Pub Date : 2023-08-31DOI: 10.18799/24131830/2023/8/4016
I. M. Vanchugov, K. S. Rezanov, R. A. Shestakov
Link for citation: Vanchugov I.M., Rezanov K.S., Shestakov R.A. On the issue of transportation of liquefied carbon dioxide. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 8, рр. 190-209. In Rus. The relevance of the study is caused by the need to capture and utilize one of the main types of greenhouse gases – carbon dioxide (CO2). This need is primarily related to the ever-increasing CO2 emissions, three quarters of which are accounted for by the combustion of various fuels. The main aim is to analyze and systematize international methods for calculating the pipeline transport of liquefied carbon dioxide (LCO2) to determine differences in numerical results, including factors taken into account and not taken into account in the methods under consideration, as well as to analyze water transport type as an alternative to pipeline transport. Objects: liquefied carbon dioxide, a pipeline for transporting LCO2. Methods: numerical modeling of LCO2 pipeline transport according to international methods to estimate the required diameter capable of providing a given pumping flow rate, analysis of the results obtained. Results. The authors have carried out a review of existing methods for calculating LCO2 pipelines, carried out numerical modeling and analysis of the results were, during which it was revealed that most models ignore the influence of impurities, which, however, affect the technological parameters of operation and modeling of LCO2 pipelines, which will lead to inaccuracies in their design and operation. In addition, it was found that the fluid velocity in the pipeline is calculated according to the parameters in the initial section, which corresponds to its minimum value in the pipeline, and is assumed to be equal to it throughout the pipeline without taking into account the expansion of LCO2 from changes in temperature and pressure along its length and, consequently, without taking into account additional pressure losses and changes in other technological parameters that they can directly affect the operational safety and economic efficiency of the designed or operated LCO2 pipeline. It should also be noted that the diameter determination equations depending on the length of the pipeline are not suitable for estimating the optimal diameter of the pipeline. As for alternatives to pipeline transport, first of all, it is worth noting the possibility of transportation by tankers over long distances or the possibility of using LCO2 to increase the flow rate of deposits on the shelf and in hard-to-reach places of the coastal zone.
{"title":"ON THE ISSUE OF TRANSPORTATION OF LIQUEFIED CARBON DIOXIDE","authors":"I. M. Vanchugov, K. S. Rezanov, R. A. Shestakov","doi":"10.18799/24131830/2023/8/4016","DOIUrl":"https://doi.org/10.18799/24131830/2023/8/4016","url":null,"abstract":"Link for citation: Vanchugov I.M., Rezanov K.S., Shestakov R.A. On the issue of transportation of liquefied carbon dioxide. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 8, рр. 190-209. In Rus.\u0000The relevance of the study is caused by the need to capture and utilize one of the main types of greenhouse gases – carbon dioxide (CO2). This need is primarily related to the ever-increasing CO2 emissions, three quarters of which are accounted for by the combustion of various fuels. The main aim is to analyze and systematize international methods for calculating the pipeline transport of liquefied carbon dioxide (LCO2) to determine differences in numerical results, including factors taken into account and not taken into account in the methods under consideration, as well as to analyze water transport type as an alternative to pipeline transport. Objects: liquefied carbon dioxide, a pipeline for transporting LCO2. Methods: numerical modeling of LCO2 pipeline transport according to international methods to estimate the required diameter capable of providing a given pumping flow rate, analysis of the results obtained. Results. The authors have carried out a review of existing methods for calculating LCO2 pipelines, carried out numerical modeling and analysis of the results were, during which it was revealed that most models ignore the influence of impurities, which, however, affect the technological parameters of operation and modeling of LCO2 pipelines, which will lead to inaccuracies in their design and operation. In addition, it was found that the fluid velocity in the pipeline is calculated according to the parameters in the initial section, which corresponds to its minimum value in the pipeline, and is assumed to be equal to it throughout the pipeline without taking into account the expansion of LCO2 from changes in temperature and pressure along its length and, consequently, without taking into account additional pressure losses and changes in other technological parameters that they can directly affect the operational safety and economic efficiency of the designed or operated LCO2 pipeline. It should also be noted that the diameter determination equations depending on the length of the pipeline are not suitable for estimating the optimal diameter of the pipeline. As for alternatives to pipeline transport, first of all, it is worth noting the possibility of transportation by tankers over long distances or the possibility of using LCO2 to increase the flow rate of deposits on the shelf and in hard-to-reach places of the coastal zone.","PeriodicalId":51816,"journal":{"name":"Bulletin of the Tomsk Polytechnic University-Geo Assets Engineering","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77577429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-31DOI: 10.18799/24131830/2023/8/4089
L. Rybnikova, P. Rybnikov, V. Navolokina
Link for citation: Rybnikova L.S., Rybnikov P.A., Navolokina V.Y. Rehabilitation of man-made formation of abandoned copper pyrite deposits on the example of Levikhinsky mine (Middle Urals). Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 8, рр. 137-150. In Rus. The relevance of the research is related to the need to rehabilitate of abandoned copper pyrite deposits affected by acid mine waters and justify measures to clean up the existing clarification pond. The main aim is to study the sludge composition and justify the measures to reduce the environmental load on the hydrosphere. Objects: clarification pond and neutralization sludge of the Levikhinsky copper pyrite mine acid mine waters. Methods. Laboratory studies of water and bottom sediments were carried out using atomic emission and mass spectral analysis; methods of flame emission spectrometry, flame atomic absorption, photometric method with Nessler's reagent, titrimetric, mercumetric and potentiometric methods; mass spectrometry with ionization in inductively coupled plasma and gravimetric method. Results. Sludge samples are dominated by sulfates (gypsum and bassanite), iron oxides and hydroxides (goethite), carbonates (calcite), clay minerals (mainly hydromica) and chlorine-containing salts (carnallite). The chemical composition of the sludge is dominated by oxides of iron, sulfur and calcium. The analysis of water and acid extracts showed that up to 24 elements belonging to hazard classes 2, 3 and 4 can be leached from the sludge in concentrations exceeding the maximum allowable values for fishery water bodies. Several options for the use of sludge from the clarification pond were analyzed: reclamation of waste rock dumps and substandard ores; backfilling of mined-out area of quarries; production of building materials; extraction of components; storage of sludge in geotubes (Geotube). The most rational is the disposal of sludge as the production of building materials on the basis of a public-private partnership, the implementation of which will allow the state and the private sector to derive mutual benefit.
{"title":"REHABILITATION OF MAN-MADE FORMATION OF ABANDONED COPPER PYRITE DEPOSITS ON THE EXAMPLE OF LEVIKHINSKY MINE (MIDDLE URALS)","authors":"L. Rybnikova, P. Rybnikov, V. Navolokina","doi":"10.18799/24131830/2023/8/4089","DOIUrl":"https://doi.org/10.18799/24131830/2023/8/4089","url":null,"abstract":"Link for citation: Rybnikova L.S., Rybnikov P.A., Navolokina V.Y. Rehabilitation of man-made formation of abandoned copper pyrite deposits on the example of Levikhinsky mine (Middle Urals). Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 8, рр. 137-150. In Rus.\u0000The relevance of the research is related to the need to rehabilitate of abandoned copper pyrite deposits affected by acid mine waters and justify measures to clean up the existing clarification pond. The main aim is to study the sludge composition and justify the measures to reduce the environmental load on the hydrosphere. Objects: clarification pond and neutralization sludge of the Levikhinsky copper pyrite mine acid mine waters. Methods. Laboratory studies of water and bottom sediments were carried out using atomic emission and mass spectral analysis; methods of flame emission spectrometry, flame atomic absorption, photometric method with Nessler's reagent, titrimetric, mercumetric and potentiometric methods; mass spectrometry with ionization in inductively coupled plasma and gravimetric method. Results. Sludge samples are dominated by sulfates (gypsum and bassanite), iron oxides and hydroxides (goethite), carbonates (calcite), clay minerals (mainly hydromica) and chlorine-containing salts (carnallite). The chemical composition of the sludge is dominated by oxides of iron, sulfur and calcium. The analysis of water and acid extracts showed that up to 24 elements belonging to hazard classes 2, 3 and 4 can be leached from the sludge in concentrations exceeding the maximum allowable values for fishery water bodies. Several options for the use of sludge from the clarification pond were analyzed: reclamation of waste rock dumps and substandard ores; backfilling of mined-out area of quarries; production of building materials; extraction of components; storage of sludge in geotubes (Geotube). The most rational is the disposal of sludge as the production of building materials on the basis of a public-private partnership, the implementation of which will allow the state and the private sector to derive mutual benefit.","PeriodicalId":51816,"journal":{"name":"Bulletin of the Tomsk Polytechnic University-Geo Assets Engineering","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73140269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-31DOI: 10.18799/24131830/2023/8/4163
Igor A. Melnik
Link for citation: Melnik I.A. Polymodality of secondary kaolinite distribution in open sandy reservoir systems. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 8, рр. 17-29. In Rus. Relevance. Numerous studies of the forms of distributions of the registered characteristics of the investigated environment according to the results of transformation of open systems have shown that the intensities and contents of transformed elements have a polymodal form of statistical distribution in the case of external impact on the system. Apparently, the essence of the phenomenon of statistical polymodality of transformation of systems is universal. Therefore, the universal theory of polymodal distribution formation can be used to analyze samples of secondary mineral contents in permeable sand reservoirs, which are open systems. Obviously, each mode of the polymodal statistical distribution of the transformed elements will be the result of the manifestation of some attractor. The purpose of this paper is to present a universal kinematic theory of the formation of a polymodal statistical distribution of the number of transformed elements of an open system, where secondary clay minerals – kaolinites, due to superimposed epigenesis in a sandy reservoir are considered as the formed elements. The objects of the study are samples of secondary kaolinitization intensity values in sand intervals of oil and gas fields of the Yamal Peninsula and the contents of secondary kaolinite (determined from the core) in Upper Jurassic sand strata of the Stolbovoe oil and gas field. Secondary kaoliniteization is caused by the influence of deep fluids. The research method was determined on the basis of the obtained equation of unified modes of polymodal distribution of the number of transforming elements (in transformation of systems). The number (intensity) of transformed elements is proportional to the ratio of the system transformation time to the flow time of the external influence on the elements of this system. Seven basic constants (attractors) related to the «golden» proportion were theoretically calculated, bringing them into conformity with universal principles of system transformation processes states. Results. Having compared constants obtained theoretically with calculated unified values of modes of empirical data, the states of system transformation processes with respect to each mode have been determined. Analysis of modes calculated in a polymodal distribution of secondary kaolinite intensities and kaolinite content, as well as comparing mode values (with corresponding transformation principle) with empirical data on transformation processes gave evidence for the validity of the universal kinematic theory. Conclusions. Thus, using universal principles of transformation, on the basis of the determined contents of secondary kaolinite in the studied intervals of permeable strata, it is possible to allocate zones with the chemica
{"title":"POLYMODALITY OF SECONDARY KAOLINITE DISTRIBUTION IN OPEN SANDY RESERVOIR SYSTEMS","authors":"Igor A. Melnik","doi":"10.18799/24131830/2023/8/4163","DOIUrl":"https://doi.org/10.18799/24131830/2023/8/4163","url":null,"abstract":"Link for citation: Melnik I.A. Polymodality of secondary kaolinite distribution in open sandy reservoir systems. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 8, рр. 17-29. In Rus.\u0000Relevance. Numerous studies of the forms of distributions of the registered characteristics of the investigated environment according to the results of transformation of open systems have shown that the intensities and contents of transformed elements have a polymodal form of statistical distribution in the case of external impact on the system. Apparently, the essence of the phenomenon of statistical polymodality of transformation of systems is universal. Therefore, the universal theory of polymodal distribution formation can be used to analyze samples of secondary mineral contents in permeable sand reservoirs, which are open systems. Obviously, each mode of the polymodal statistical distribution of the transformed elements will be the result of the manifestation of some attractor. The purpose of this paper is to present a universal kinematic theory of the formation of a polymodal statistical distribution of the number of transformed elements of an open system, where secondary clay minerals – kaolinites, due to superimposed epigenesis in a sandy reservoir are considered as the formed elements. The objects of the study are samples of secondary kaolinitization intensity values in sand intervals of oil and gas fields of the Yamal Peninsula and the contents of secondary kaolinite (determined from the core) in Upper Jurassic sand strata of the Stolbovoe oil and gas field. Secondary kaoliniteization is caused by the influence of deep fluids. The research method was determined on the basis of the obtained equation of unified modes of polymodal distribution of the number of transforming elements (in transformation of systems). The number (intensity) of transformed elements is proportional to the ratio of the system transformation time to the flow time of the external influence on the elements of this system. Seven basic constants (attractors) related to the «golden» proportion were theoretically calculated, bringing them into conformity with universal principles of system transformation processes states. Results. Having compared constants obtained theoretically with calculated unified values of modes of empirical data, the states of system transformation processes with respect to each mode have been determined. Analysis of modes calculated in a polymodal distribution of secondary kaolinite intensities and kaolinite content, as well as comparing mode values (with corresponding transformation principle) with empirical data on transformation processes gave evidence for the validity of the universal kinematic theory. Conclusions. Thus, using universal principles of transformation, on the basis of the determined contents of secondary kaolinite in the studied intervals of permeable strata, it is possible to allocate zones with the chemica","PeriodicalId":51816,"journal":{"name":"Bulletin of the Tomsk Polytechnic University-Geo Assets Engineering","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79361422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-31DOI: 10.18799/24131830/2023/8/4017
T. V. Bukharkina, S. V. Verzhichinskaya, I. Tarkhanova, A. Konovalov
Link for citation: Bukharkina T.V., Verzhichinskaya S.V., Tarkhanova I.G., Konovalov A.V. Recycling of solid residue of pyrolysis of car tires. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 8, рр. 79-90. In Rus. The relevance. Tire recycling contributes to the environmental situation due to the cost-effective disposal of large volumes of tires out of service, in addition, it is an opportunity to obtain valuable chemical products without using natural resources as the main sources of initial reagents. The main aim of the research is to identify and propose directions for processing car tires and the solid residue of their pyrolysis, depending on their type and quality. Objects: automobile tires of domestic and foreign production; pyrolysis products and their subsequent refinement of various car tires. Methods: technical analysis of solid carbon-containing materials – Eschka method, iodometry for determining the iodine number, determination of moisture and pH of an aqueous suspension, ash content, volatile matter, light transmission coefficient of a toluene extract. Results. It was revealed that the solid pyrolysis residue studied in the work with the obtained indicators of its quality can be used as a filler in the rubber mixture or as a sorbent for heavy oil products, and a scheme was developed that reflects the ways of processing the solid pyrolysis residue obtained as a result of the disposal of passenger cars. and truck tires of various domestic and foreign manufacturers. The result of the work, in particular, the dependence of the direction of processing the solid residue of the pyrolysis of car tires from various manufacturers on its quality indicators, can serve as a theoretical basis for developing a unified program for recycling car tires in order to preserve and improve the environmental situation in various regions.
{"title":"RECYCLING OF SOLID RESIDUE OF PYROLYSIS OF CAR TIRES","authors":"T. V. Bukharkina, S. V. Verzhichinskaya, I. Tarkhanova, A. Konovalov","doi":"10.18799/24131830/2023/8/4017","DOIUrl":"https://doi.org/10.18799/24131830/2023/8/4017","url":null,"abstract":"Link for citation: Bukharkina T.V., Verzhichinskaya S.V., Tarkhanova I.G., Konovalov A.V. Recycling of solid residue of pyrolysis of car tires. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 8, рр. 79-90. In Rus.\u0000The relevance. Tire recycling contributes to the environmental situation due to the cost-effective disposal of large volumes of tires out of service, in addition, it is an opportunity to obtain valuable chemical products without using natural resources as the main sources of initial reagents. The main aim of the research is to identify and propose directions for processing car tires and the solid residue of their pyrolysis, depending on their type and quality. Objects: automobile tires of domestic and foreign production; pyrolysis products and their subsequent refinement of various car tires. Methods: technical analysis of solid carbon-containing materials – Eschka method, iodometry for determining the iodine number, determination of moisture and pH of an aqueous suspension, ash content, volatile matter, light transmission coefficient of a toluene extract. Results. It was revealed that the solid pyrolysis residue studied in the work with the obtained indicators of its quality can be used as a filler in the rubber mixture or as a sorbent for heavy oil products, and a scheme was developed that reflects the ways of processing the solid pyrolysis residue obtained as a result of the disposal of passenger cars. and truck tires of various domestic and foreign manufacturers. The result of the work, in particular, the dependence of the direction of processing the solid residue of the pyrolysis of car tires from various manufacturers on its quality indicators, can serve as a theoretical basis for developing a unified program for recycling car tires in order to preserve and improve the environmental situation in various regions.","PeriodicalId":51816,"journal":{"name":"Bulletin of the Tomsk Polytechnic University-Geo Assets Engineering","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84817633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-31DOI: 10.18799/24131830/2023/8/4044
Van-Binh Duong, I. Fomenko, Duc-Tuan Ta, Trung K. Nguyen, O. Zerkal, D. Gorobtsov, Hong-Dang Vu
Link for citation: Van B. Duong, Fomenko I.K., Duc T. Ta, Trung K. Nguyen, Zerkal O.V., Gorobtsov D.N., Hong D. Vu. Influence of digital elevation model resolution on mapping territory susceptibility to landslide development. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 8, рр. 164-181. In Rus. The relevance. Landslides are one of the most hazardous natural disasters in the world, causing significant economic damage and human deaths. For 20 years (1995–2014), 3876 landslides killed 163658 people and injured 11689 people, as reported by the U. Haque study (2019), based on the data from 128 countries. Excluding events triggered by earthquakes, the total number of fatal landslides from 2004 to 2016 was 4862, and most landslides (75 %) occurred in Asia. In Vietnam, particularly in the northern mountainous regions, landslides frequently caused considerable losses of life and property. The systematic evaluation of landslide hazards is a crucial component of Vietnam's disaster prevention strategy. The main aim of this study is to assess the landslide susceptibility of the Batxat district, Laocai province (Vietnam), using four digital elevation model resolutions (10, 30, 40, and 60 m) and nine landslide causative factors: slope aspect, elevation, slope, distance to roads, distance to faults, distance to drainage, average monthly precipitation, land use, and weathering crust. Object of the study is the landslide susceptibility in Batxat district, Laocai province, Vietnam. Methods: Certainty Factor method, fractal method. Results. The performed analyses indicated a statistically significant relationship between the distribution of landslides and the landslide causative factors in the study area. As a result, the territory was divided into five zones according to its susceptibility to the landslide process: very low, low, moderate, high, and very high. The very low landslide susceptibility zone is less than 10 % of the study area, while the very high susceptibility zone varies from 14,95 to 18,32 %, depending on the digital elevation model spatial resolution. Analysis of the Receiver Operating Characteristics curve revealed that all models, independent of digital elevation model resolution, have good prediction efficiency, with the area under the receiver operating characteristic curve over 70 %. In addition, the Receiver operating characteristic and fractal analysis results indicated that the model with a digital elevation model spatial resolution of 60 m has the highest accuracy. This significant conclusion may be explained by the fact that the accuracy of the landslide susceptibility assessment result is dependent not only on the digital elevation model resolution but also on the ratio of the digital elevation model resolution and the average area of landslides in the study area. This conclusion proves that it is necessary to depict landslide locations and their detailed morphological characteristics on the lan
引用链接:Van B. Duong, Fomenko I.K, Duc T. Ta, Trung K. Nguyen, Zerkal O.V, Gorobtsov d.n.， Hong D. Vu。数字高程模型分辨率对测绘区域滑坡发展敏感性的影响。托木斯克理工大学公报。岩土工程Аssets, 2023，第334卷，第2期。8日,рр。164 - 181。俄文。的相关性。山体滑坡是世界上最危险的自然灾害之一，造成重大经济损失和人员死亡。哈克大学的研究(2019年)基于128个国家的数据，报告称，在20年(1995年至2014年)期间，发生了3876次山体滑坡，造成163658人死亡，11689人受伤。除地震引发的事件外，2004年至2016年发生的致命滑坡总数为4862起，其中大多数(75%)发生在亚洲。在越南，特别是在北部山区，山体滑坡经常造成相当大的生命和财产损失。对滑坡灾害进行系统评估是越南防灾战略的重要组成部分。本研究的主要目的是利用4种数字高程模型分辨率(10、30、40和60 m)和9个滑坡成因因子:坡向、高程、坡度、与道路的距离、与断层的距离、与排水的距离、月平均降水量、土地利用和风化层，对越南老菜省巴扎特地区的滑坡易损性进行评估。以越南老蔡省巴特夏地区滑坡易感性为研究对象。方法:确定性因子法、分形法。结果。分析表明，研究区滑坡分布与滑坡成因之间存在显著的统计学关系。因此，根据其对滑坡过程的易感性，将该地区划分为五个区域:极低、低、中、高和极高。根据数字高程模型空间分辨率的不同，极低滑坡易感性区小于研究区面积的10%，而极高滑坡易感性区在14.95 ~ 18.32%之间变化。对接收机工作特性曲线的分析表明，所有模型与数字高程模型分辨率无关，均具有良好的预测效率，接收机工作特性曲线下面积超过70%。此外，接收机的工作特性和分形分析结果表明，数字高程模型空间分辨率为60 m的模型精度最高。这一重要结论可以解释为，滑坡易感性评价结果的准确性不仅取决于数字高程模型分辨率，还取决于数字高程模型分辨率与研究区滑坡平均面积的比值。这一结论证明了在滑坡清查图上描绘滑坡位置及其详细形态特征的必要性。
{"title":"INFLUENCE OF DIGITAL ELEVATION MODEL RESOLUTION ON MAPPING TERRITORY SUSCEPTIBILITY TO LANDSLIDE DEVELOPMENT","authors":"Van-Binh Duong, I. Fomenko, Duc-Tuan Ta, Trung K. Nguyen, O. Zerkal, D. Gorobtsov, Hong-Dang Vu","doi":"10.18799/24131830/2023/8/4044","DOIUrl":"https://doi.org/10.18799/24131830/2023/8/4044","url":null,"abstract":"Link for citation: Van B. Duong, Fomenko I.K., Duc T. Ta, Trung K. Nguyen, Zerkal O.V., Gorobtsov D.N., Hong D. Vu. Influence of digital elevation model resolution on mapping territory susceptibility to landslide development. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 8, рр. 164-181. In Rus.\u0000The relevance. Landslides are one of the most hazardous natural disasters in the world, causing significant economic damage and human deaths. For 20 years (1995–2014), 3876 landslides killed 163658 people and injured 11689 people, as reported by the U. Haque study (2019), based on the data from 128 countries. Excluding events triggered by earthquakes, the total number of fatal landslides from 2004 to 2016 was 4862, and most landslides (75 %) occurred in Asia. In Vietnam, particularly in the northern mountainous regions, landslides frequently caused considerable losses of life and property. The systematic evaluation of landslide hazards is a crucial component of Vietnam's disaster prevention strategy.\u0000The main aim of this study is to assess the landslide susceptibility of the Batxat district, Laocai province (Vietnam), using four digital elevation model resolutions (10, 30, 40, and 60 m) and nine landslide causative factors: slope aspect, elevation, slope, distance to roads, distance to faults, distance to drainage, average monthly precipitation, land use, and weathering crust. Object of the study is the landslide susceptibility in Batxat district, Laocai province, Vietnam. Methods: Certainty Factor method, fractal method. Results. The performed analyses indicated a statistically significant relationship between the distribution of landslides and the landslide causative factors in the study area. As a result, the territory was divided into five zones according to its susceptibility to the landslide process: very low, low, moderate, high, and very high. The very low landslide susceptibility zone is less than 10 % of the study area, while the very high susceptibility zone varies from 14,95 to 18,32 %, depending on the digital elevation model spatial resolution. Analysis of the Receiver Operating Characteristics curve revealed that all models, independent of digital elevation model resolution, have good prediction efficiency, with the area under the receiver operating characteristic curve over 70 %. In addition, the Receiver operating characteristic and fractal analysis results indicated that the model with a digital elevation model spatial resolution of 60 m has the highest accuracy. This significant conclusion may be explained by the fact that the accuracy of the landslide susceptibility assessment result is dependent not only on the digital elevation model resolution but also on the ratio of the digital elevation model resolution and the average area of landslides in the study area. This conclusion proves that it is necessary to depict landslide locations and their detailed morphological characteristics on the lan","PeriodicalId":51816,"journal":{"name":"Bulletin of the Tomsk Polytechnic University-Geo Assets Engineering","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86680400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-31DOI: 10.18799/24131830/2023/8/4189
A. Tsimmerman, I. Shanenkov, Artur Nassyrbayev, D. Nikitin, A. Sivkov
Link for citation: Tsimmerman A.I., Shanenkov I.I., Nassyrbayev A.R., Nikitin D.S., Sivkov A.A. Influence of configuration of the electrode system of a coaxial magneto plasma accelerator on arc discharge formation and development. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 8, рр. 39-50. In Rus. The relevance of the research is explained by a wide range of practical areas, where various plasma generators can be used, including analytical devices, technological installations, tokamaks, ion and plasma engines, satellites, laser technology, as well as by the possibility of applying them for both producing coatings on various surfaces and synthesizing fine and nanopowders. The main aim of the research is to determine the best way to initiate an arc discharge in the acceleration channel of the coaxial magnetoplasma accelerator, to estimate the effect of the plasma formation zone configuration on the electrodynamic loads of the accelerator, and to calculate the efficiency of conversion of stored energy to supplied one. Objects: coaxial magnetoplasma accelerator, arc discharge initiation, central electrode, electrode-barrel, plasma formation zone. Methods: experiment, plasma dynamic synthesis, measurement and registration of pulsed currents and voltages, electrical erosion measurement by means of weighing the eroding electrode-bore, high-speed photoregistration of the plasma jet. Results. Two methods of arc discharge initiation using metal wires and graphitization were considered. It is established that they do not affect the energy parameters of the plasma dynamic synthesis, but the graphitization looks preferable due to the greater processability of the procedure that provides easy accelerator preparation and reliability of its operation. The possibility of reducing the arc discharge current amplitude by 29 % with increasing the plasma formation zone length from 5,5 to 11,5 mm was established that results in reducing electrodynamic loads on all system nodes. The optimal plasma formation zone length of 9,5 mm was determined to provide obtaining a high efficiency of conversion of stored energy into supplied energy and reliability of the system operation.
{"title":"INFLUENCE OF CONFIGURATION OF THE ELECTRODE SYSTEM OF A COAXIAL MAGNETO PLASMA ACCELERATOR ON ARC DISCHARGE FORMATION AND DEVELOPMENT","authors":"A. Tsimmerman, I. Shanenkov, Artur Nassyrbayev, D. Nikitin, A. Sivkov","doi":"10.18799/24131830/2023/8/4189","DOIUrl":"https://doi.org/10.18799/24131830/2023/8/4189","url":null,"abstract":"Link for citation: Tsimmerman A.I., Shanenkov I.I., Nassyrbayev A.R., Nikitin D.S., Sivkov A.A. Influence of configuration of the electrode system of a coaxial magneto plasma accelerator on arc discharge formation and development. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 8, рр. 39-50. In Rus.\u0000The relevance of the research is explained by a wide range of practical areas, where various plasma generators can be used, including analytical devices, technological installations, tokamaks, ion and plasma engines, satellites, laser technology, as well as by the possibility of applying them for both producing coatings on various surfaces and synthesizing fine and nanopowders. The main aim of the research is to determine the best way to initiate an arc discharge in the acceleration channel of the coaxial magnetoplasma accelerator, to estimate the effect of the plasma formation zone configuration on the electrodynamic loads of the accelerator, and to calculate the efficiency of conversion of stored energy to supplied one. Objects: coaxial magnetoplasma accelerator, arc discharge initiation, central electrode, electrode-barrel, plasma formation zone. Methods: experiment, plasma dynamic synthesis, measurement and registration of pulsed currents and voltages, electrical erosion measurement by means of weighing the eroding electrode-bore, high-speed photoregistration of the plasma jet. Results. Two methods of arc discharge initiation using metal wires and graphitization were considered. It is established that they do not affect the energy parameters of the plasma dynamic synthesis, but the graphitization looks preferable due to the greater processability of the procedure that provides easy accelerator preparation and reliability of its operation. The possibility of reducing the arc discharge current amplitude by 29 % with increasing the plasma formation zone length from 5,5 to 11,5 mm was established that results in reducing electrodynamic loads on all system nodes. The optimal plasma formation zone length of 9,5 mm was determined to provide obtaining a high efficiency of conversion of stored energy into supplied energy and reliability of the system operation.","PeriodicalId":51816,"journal":{"name":"Bulletin of the Tomsk Polytechnic University-Geo Assets Engineering","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76480228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-31DOI: 10.18799/24131830/2023/8/4349
S. Kladiev
Link for citation: Kladiev S.N. Review and critical analysis of the current state and ways of developing the technological process of oil production by an electric drive in intermittent modes of operation of low- and medium-rate wells. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 8, рр. 220-231. In Rus. Relevance. The Russian Federation is one of the world leaders among oil-producing countries in terms of proven oil reserves. Historically, industrial oil production in the Russian Empire began in the area of the Caspian Sea on the territory of modern Azerbaijan. The energy strategy of the Russian Federation for the period up to 2035, as one of the measures to ensure the energy security of the country, provides for the introduction into economic circulation of hard-to-recover oil reserves (including from the Bazhenov formation) based on innovative domestic technologies and equipment. The main problem of the oil industry in Russia, as well as throughout the world, is the decline in the quality of the resource base. In oil-producing regions, there is a depletion of active oil reserves. Significant residual reserves of developed fields are expected to be brought into active exploitation using new oil production technologies. Ways of growth in oil production are possible in accordance with three different scenarios: innovative – it is supposed to increase the contribution to the total indicators of Russian oil production from new provinces, such as Eastern Siberia, the Republic of Sakha (Yakutia), as well as new fields in Western Siberia and the Krasnoyarsk Territory and the development of the shelf northern seas; forced scenario – in case of more active introduction of new technologies and incentive measures that reduce the cost of the production process, it is possible to increase the efficiency of oil production in offshore and hard-to-recover fields; extensive scenario of oil production is possible only at high market prices for oil. The main volume of production is carried out and will continue to be exclusively electrically driven. The purpose: a review and critical analysis of the current state and ways of developing the technological process of oil production by an electric drive in intermittent modes of operation of low- and medium-rate wells. Object: theoretical substantiation of the introduction of cyclic or short-term operation of electric centrifugal pump installations with an electric drive method of downhole oil production into practice. Methods: geophysical research to develop a concept for the operation of a marginal well stock, ways to increase the profitability of oil production, methods for optimizing the stock of medium and marginal wells, putting them into economic circulation. Results. Based on a critical analysis of literary sources and a feasibility study, it is shown that the most promising way to extract hard-to-recover oil reserves on the example of the Bazhenov formation is the e
{"title":"REVIEW AND CRITICAL ANALYSIS OF THE CURRENT STATE AND WAYS OF DEVELOPING THE TECHNOLOGICAL PROCESS OF OIL PRODUCTION BY AN ELECTRIC DRIVE IN INTERMITTENT MODES OF OPERATION OF LOW- AND MEDIUM-RATE WELLS","authors":"S. Kladiev","doi":"10.18799/24131830/2023/8/4349","DOIUrl":"https://doi.org/10.18799/24131830/2023/8/4349","url":null,"abstract":"Link for citation: Kladiev S.N. Review and critical analysis of the current state and ways of developing the technological process of oil production by an electric drive in intermittent modes of operation of low- and medium-rate wells. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 8, рр. 220-231. In Rus.\u0000Relevance. The Russian Federation is one of the world leaders among oil-producing countries in terms of proven oil reserves. Historically, industrial oil production in the Russian Empire began in the area of the Caspian Sea on the territory of modern Azerbaijan. The energy strategy of the Russian Federation for the period up to 2035, as one of the measures to ensure the energy security of the country, provides for the introduction into economic circulation of hard-to-recover oil reserves (including from the Bazhenov formation) based on innovative domestic technologies and equipment. The main problem of the oil industry in Russia, as well as throughout the world, is the decline in the quality of the resource base. In oil-producing regions, there is a depletion of active oil reserves. Significant residual reserves of developed fields are expected to be brought into active exploitation using new oil production technologies. Ways of growth in oil production are possible in accordance with three different scenarios: innovative – it is supposed to increase the contribution to the total indicators of Russian oil production from new provinces, such as Eastern Siberia, the Republic of Sakha (Yakutia), as well as new fields in Western Siberia and the Krasnoyarsk Territory and the development of the shelf northern seas; forced scenario – in case of more active introduction of new technologies and incentive measures that reduce the cost of the production process, it is possible to increase the efficiency of oil production in offshore and hard-to-recover fields; extensive scenario of oil production is possible only at high market prices for oil. The main volume of production is carried out and will continue to be exclusively electrically driven. The purpose: a review and critical analysis of the current state and ways of developing the technological process of oil production by an electric drive in intermittent modes of operation of low- and medium-rate wells. Object: theoretical substantiation of the introduction of cyclic or short-term operation of electric centrifugal pump installations with an electric drive method of downhole oil production into practice. Methods: geophysical research to develop a concept for the operation of a marginal well stock, ways to increase the profitability of oil production, methods for optimizing the stock of medium and marginal wells, putting them into economic circulation. Results. Based on a critical analysis of literary sources and a feasibility study, it is shown that the most promising way to extract hard-to-recover oil reserves on the example of the Bazhenov formation is the e","PeriodicalId":51816,"journal":{"name":"Bulletin of the Tomsk Polytechnic University-Geo Assets Engineering","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74702012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-31DOI: 10.18799/24131830/2023/8/4174
M. Korovkin, Lyudmila G. Ananyeva, A. Zherlitsyn, S. Kondratiev, O. Savinova, Veronika S. Kurskaya
Link for citation: Korovkin M.V., Ananyeva L.G., Zherlitsyn A.A., Kondratiev S.S., Savinova O.V., Kurskaya V.S. Assessment of crystallinity degree of quartz raw materials. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 8, рр. 59-67. In Rus. The relevance of research is determined by the need to assess the degree of transformation of quartz raw materials in its natural occurrence, as well as, changes in the properties of raw materials and products are exploited under various operating conditions. X-ray diffraction and Infrared spectroscopy was used to assess the degree of crystallinity of various crystalline quartz materials and products made of silicon dioxide, which showed satisfactory convergence of results and can be recommended for use in world practice. Objects: artificially grown quartz, including samples of synthetic quartz with an admixture of aluminum, zone-colored single crystal of quartz with an admixture of two and ferric iron; natural crystals of amethyst, smoky quartz, optical quartz; samples of fused quartz, products made of technical and optical quartz and silicate glass; as well as fine-grained samples of quartzites, including their micro- and nano-sized fractions. Methods: optical and electron scanning microscopy, X-ray spectral and analysis, infrared spectroscopy, X-ray diffraction. Results. The paper shows that the degree of crystallinity of quartz raw materials and products based on it is determined by the presence of a structural ordering in the near zone that characterizes the crystalline state corresponding to the a-quartz phase, which is confidently recorded by XRD and FTIR methods. The local disorder of high-purity quartz or quartzites having various impurities or defects in their structure that arise under the influence of external influences or exploitation causes deterioration of their properties and decrease in the degree of crystallinity.
{"title":"ASSESSMENT OF CRYSTALLINITY DEGREE OF QUARTZ RAW MATERIALS","authors":"M. Korovkin, Lyudmila G. Ananyeva, A. Zherlitsyn, S. Kondratiev, O. Savinova, Veronika S. Kurskaya","doi":"10.18799/24131830/2023/8/4174","DOIUrl":"https://doi.org/10.18799/24131830/2023/8/4174","url":null,"abstract":"Link for citation: Korovkin M.V., Ananyeva L.G., Zherlitsyn A.A., Kondratiev S.S., Savinova O.V., Kurskaya V.S. Assessment of crystallinity degree of quartz raw materials. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 8, рр. 59-67. In Rus.\u0000The relevance of research is determined by the need to assess the degree of transformation of quartz raw materials in its natural occurrence, as well as, changes in the properties of raw materials and products are exploited under various operating conditions. X-ray diffraction and Infrared spectroscopy was used to assess the degree of crystallinity of various crystalline quartz materials and products made of silicon dioxide, which showed satisfactory convergence of results and can be recommended for use in world practice. Objects: artificially grown quartz, including samples of synthetic quartz with an admixture of aluminum, zone-colored single crystal of quartz with an admixture of two and ferric iron; natural crystals of amethyst, smoky quartz, optical quartz; samples of fused quartz, products made of technical and optical quartz and silicate glass; as well as fine-grained samples of quartzites, including their micro- and nano-sized fractions. Methods: optical and electron scanning microscopy, X-ray spectral and analysis, infrared spectroscopy, X-ray diffraction. Results. The paper shows that the degree of crystallinity of quartz raw materials and products based on it is determined by the presence of a structural ordering in the near zone that characterizes the crystalline state corresponding to the a-quartz phase, which is confidently recorded by XRD and FTIR methods. The local disorder of high-purity quartz or quartzites having various impurities or defects in their structure that arise under the influence of external influences or exploitation causes deterioration of their properties and decrease in the degree of crystallinity.","PeriodicalId":51816,"journal":{"name":"Bulletin of the Tomsk Polytechnic University-Geo Assets Engineering","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88537998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-31DOI: 10.18799/24131830/2023/8/4049
A. Lambin, E. Averkina
Link for citation: Lambin A.I., Averkina E.V. Study of the variability of rheological properties of water-based biopolymer dispersions in drilling fluids. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 8, рр. 91-97. In Rus. The relevance. Water-based biopolymer drilling fluids have become quite widespread in the technology of oil and gas well construction. Much attention is paid to the methods of regulating the physical and mechanical properties of biopolymer systems. In particular, rheological properties of solutions based on xanthan gum are of great practical interest. The effectiveness of the use of polymers is determined by the amount of the main reagent and modifying additives necessary to impart the required properties to the washing liquid. Biopolymer water drilling fluids based on xanthan gum have shown their effectiveness in many regions of the Russian Federation. However, the evaluation of the effectiveness of the solutions is difficult due to the differences in the saleable products of the producing companies in solubility, swelling and composition, which affects the optimized performance of the drilling mud. The main aim: consideration of the differences in aqueous solutions of a number of samples of xanthan gum in terms of power dependence: K-coefficient of consistency and n-degree of deviation from the Newtonian flow regime of the study. Objects: rheology of aqueous solutions of several xanthan samples, both purely aqueous and based on aqueous brines of potassium chloride (KCl) and sodium (NaCl). Methods: instrumental methods for determining the parameters of drilling fluids according to SS 33213-2014; the difference in the parameters of the power rheological dependence was determined by comparing its indicators after measuring the viscosity of solutions on a viscometer with direct indications. Results. The influence of a fixed concentration of NaCl and KCl salts on the considered indicators of the power model is shown. A generalized optimization indicator is proposed for solutions obeying a power-law rheological law. The calculated dependence of the accuracy of approximation of experimental data by a power model, which showed acceptable accuracy, is presented.
{"title":"STUDY OF THE VARIABILITY OF RHEOLOGICAL PROPERTIES OF WATER-BASED BIOPOLYMER DISPERSIONS IN DRILLING FLUIDS","authors":"A. Lambin, E. Averkina","doi":"10.18799/24131830/2023/8/4049","DOIUrl":"https://doi.org/10.18799/24131830/2023/8/4049","url":null,"abstract":"Link for citation: Lambin A.I., Averkina E.V. Study of the variability of rheological properties of water-based biopolymer dispersions in drilling fluids. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 8, рр. 91-97. In Rus.\u0000The relevance. Water-based biopolymer drilling fluids have become quite widespread in the technology of oil and gas well construction. Much attention is paid to the methods of regulating the physical and mechanical properties of biopolymer systems. In particular, rheological properties of solutions based on xanthan gum are of great practical interest. The effectiveness of the use of polymers is determined by the amount of the main reagent and modifying additives necessary to impart the required properties to the washing liquid. Biopolymer water drilling fluids based on xanthan gum have shown their effectiveness in many regions of the Russian Federation. However, the evaluation of the effectiveness of the solutions is difficult due to the differences in the saleable products of the producing companies in solubility, swelling and composition, which affects the optimized performance of the drilling mud. The main aim: consideration of the differences in aqueous solutions of a number of samples of xanthan gum in terms of power dependence: K-coefficient of consistency and n-degree of deviation from the Newtonian flow regime of the study. Objects: rheology of aqueous solutions of several xanthan samples, both purely aqueous and based on aqueous brines of potassium chloride (KCl) and sodium (NaCl). Methods: instrumental methods for determining the parameters of drilling fluids according to SS 33213-2014; the difference in the parameters of the power rheological dependence was determined by comparing its indicators after measuring the viscosity of solutions on a viscometer with direct indications. Results. The influence of a fixed concentration of NaCl and KCl salts on the considered indicators of the power model is shown. A generalized optimization indicator is proposed for solutions obeying a power-law rheological law. The calculated dependence of the accuracy of approximation of experimental data by a power model, which showed acceptable accuracy, is presented.","PeriodicalId":51816,"journal":{"name":"Bulletin of the Tomsk Polytechnic University-Geo Assets Engineering","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75402004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-28DOI: 10.18799/24131830/2023/7/4220
G. Nazarova, E. Ivashkina, V. V. Maltsev
Link for citation: Nazarova G.Y., Ivashkina E.N., Maltsev V.V. Calculation of thermodynamic and kinetic parameters of catalytic cracking reactions on Lewis and Brønsted acid sites. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 7, рр. 214-225. In Rus. The relevance of the research is caused by the emerging necessity of developing a mathematical model to optimize the heterogeneous process of catalytic cracking. This tools should take into account both the chemical transformations of a wide range of hydrocarbon groups (different feedstock types), as well as the stages of adsorption, reactants diffusion, conversion of hydrocarbons on the catalyst surface, acid characteristics and pore size of the catalysts. The study of the hydrocarbon conversion patterns on Lewis or Brønsted acid sites using quantum-chemical modeling methods allow us to quantify the thermodynamic parameters of reactants adsorption, the kinetic parameters of carbocations formation and cracking on acid sites. These results are necessary to develop a mathematical model based on the of heterogeneous catalytic reaction mechanism. The aim of this work is to identify the level of quantum chemical theory and to determine the thermodynamic and kinetic parameters of reactants adsorption, carbenium ions formationand hydrocarbons cracking on Lewis and Brønsted acid sites. Methods: quantum-chemical modeling methods to optimize the molecular geometry of reactants and products of catalytic cracking reactions, calculate vibrational frequencies, thermodynamic parameters of adsorption and catalytic cracking of hydrocarbons and heteroatomic compounds with the participation of Bronsted and Lewis acid sites. Results. The chosen level of quantum-chemical theory allowed obtaining the results that are consistent with the laws of the process and the experimental reactivity of hydrocarbons in cracking reactions on acid catalysts. The thermodynamic parameters of the adsorption of C6–C16 hydrocarbons and thiophenes on Lewis and Brønsted acid sites were identified. We found that during the cracking of n-hexane on the Lewis acid site, the reaction is limited by the carbenium ion formation stage.The activation energy of this stage was 281,3 kJ/mol whereas the value for the cracking stage was 277,2 kJ/mol. Further study shows that the activation energy of carbenium ion formation from izohexane and C8–C10 alkanes with normal structure on the Lewis acid site was 257,6 and 279,2…277,9 kJ/mol. The most energetically favorable is the formation of carbocation from hexene at Brønsted acid sites (76,59 kJ/mol). The results of the work will be used to create a mathematical model of a heterogeneous process based on the Langmuir–Hinshelwood equations.
{"title":"CALCULATION OF THERMODYNAMIC AND KINETIC PARAMETERS OF CATALYTIC CRACKING REACTIONS ON LEWIS AND BRØNSTED ACID SITES","authors":"G. Nazarova, E. Ivashkina, V. V. Maltsev","doi":"10.18799/24131830/2023/7/4220","DOIUrl":"https://doi.org/10.18799/24131830/2023/7/4220","url":null,"abstract":"Link for citation: Nazarova G.Y., Ivashkina E.N., Maltsev V.V. Calculation of thermodynamic and kinetic parameters of catalytic cracking reactions on Lewis and Brønsted acid sites. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 7, рр. 214-225. In Rus.\u0000The relevance of the research is caused by the emerging necessity of developing a mathematical model to optimize the heterogeneous process of catalytic cracking. This tools should take into account both the chemical transformations of a wide range of hydrocarbon groups (different feedstock types), as well as the stages of adsorption, reactants diffusion, conversion of hydrocarbons on the catalyst surface, acid characteristics and pore size of the catalysts. The study of the hydrocarbon conversion patterns on Lewis or Brønsted acid sites using quantum-chemical modeling methods allow us to quantify the thermodynamic parameters of reactants adsorption, the kinetic parameters of carbocations formation and cracking on acid sites. These results are necessary to develop a mathematical model based on the of heterogeneous catalytic reaction mechanism. The aim of this work is to identify the level of quantum chemical theory and to determine the thermodynamic and kinetic parameters of reactants adsorption, carbenium ions formationand hydrocarbons cracking on Lewis and Brønsted acid sites. Methods: quantum-chemical modeling methods to optimize the molecular geometry of reactants and products of catalytic cracking reactions, calculate vibrational frequencies, thermodynamic parameters of adsorption and catalytic cracking of hydrocarbons and heteroatomic compounds with the participation of Bronsted and Lewis acid sites. Results. The chosen level of quantum-chemical theory allowed obtaining the results that are consistent with the laws of the process and the experimental reactivity of hydrocarbons in cracking reactions on acid catalysts. The thermodynamic parameters of the adsorption of C6–C16 hydrocarbons and thiophenes on Lewis and Brønsted acid sites were identified. We found that during the cracking of n-hexane on the Lewis acid site, the reaction is limited by the carbenium ion formation stage.The activation energy of this stage was 281,3 kJ/mol whereas the value for the cracking stage was 277,2 kJ/mol. Further study shows that the activation energy of carbenium ion formation from izohexane and C8–C10 alkanes with normal structure on the Lewis acid site was 257,6 and 279,2…277,9 kJ/mol. The most energetically favorable is the formation of carbocation from hexene at Brønsted acid sites (76,59 kJ/mol). The results of the work will be used to create a mathematical model of a heterogeneous process based on the Langmuir–Hinshelwood equations.","PeriodicalId":51816,"journal":{"name":"Bulletin of the Tomsk Polytechnic University-Geo Assets Engineering","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84072348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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