Pub Date : 2018-12-20DOI: 10.33070/ETARS.4.2018.03
V. Marchevskii, Y. Grobovenko
The authors of the article justified the physical model of the drying process of titanium dioxide paste and the drying of TiO2 fine powder to a residual moisture content of 0.3%, on the basis of which a mathematical model of the drying process is developed. The result of solving the mathematical model is the kinetic parameters of the drying process, with the help of which the drying apparatus of the vortex type was designed, designed and manufactured. The results of the simulation were verified by experimental studies of the drying and drying of TiO2 paste, and experimental graphical dependences of the drying rate and product temperature on the drying time were obtained. The obtained dependences are analyzed and the necessary initial parameters of the coolant are established, which allow increasing the drying rate and reducing energy costs for the drying process. As a result of the experiments, the fine powder of titanium dioxide fits the requirements of state standards and possesses the necessary mechanical and consumer properties. Bibl. 10, Fig. 7.
{"title":"KINETICS OF THE PROCESS OF DRYING THE PASTE OF TITANIUM DIOXIDE IN AN ORIGINAL DRYING VORTEX APPARATUS AND OBTAINING A FINE POWDER TIO2","authors":"V. Marchevskii, Y. Grobovenko","doi":"10.33070/ETARS.4.2018.03","DOIUrl":"https://doi.org/10.33070/ETARS.4.2018.03","url":null,"abstract":"The authors of the article justified the physical model of the drying process of titanium dioxide paste and the drying of TiO2 fine powder to a residual moisture content of 0.3%, on the basis of which a mathematical model of the drying process is developed. The result of solving the mathematical model is the kinetic parameters of the drying process, with the help of which the drying apparatus of the vortex type was designed, designed and manufactured. The results of the simulation were verified by experimental studies of the drying and drying of TiO2 paste, and experimental graphical dependences of the drying rate and product temperature on the drying time were obtained. The obtained dependences are analyzed and the necessary initial parameters of the coolant are established, which allow increasing the drying rate and reducing energy costs for the drying process. As a result of the experiments, the fine powder of titanium dioxide fits the requirements of state standards and possesses the necessary mechanical and consumer properties. Bibl. 10, Fig. 7.","PeriodicalId":11558,"journal":{"name":"Energy Technologies & Resource Saving","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80648392","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 : 2018-12-20DOI: 10.33070/ETARS.1.2018.04
K. Kostohryz, V. Zhaivoronok, Yu.I. Khvastukhin, S. Román
In dry desulfurization, for example, of gaseous combustion products of thermal power plants and incineration plants, calcium oxide CaO, as a product of firing of natural carbonate rocks, mainly limestones (CaCO3), is widely used. Firing technology, depending on the limestone heat treatment regimes, form a product with certain physicochemical properties: porosity, specific surface, shrinkage value, chemical activity. The influence of heat treatment conditions on the properties of the product obtained is studied. The possibility of fast low temperature heat treatment of finely dispersed limestone in a fluidized bed of an inert material to produce CaO of the required quality is shown. Research facility, technique for carrying out experiments and processing experimental data are described. As a result of the research, the degree of calcination of 80 % of fine limestone in a device with fluidized bed of inert material was achieved and the residence time of the particles in the inert layer was determined. Bibl. 10, Fig. 2, Tab. 1.
{"title":"PRODUCTION OF LIME WITH HIGH REACTIVITY IN A FLUIDIZED BED APPARATUS OF AN INERT MATERIAL","authors":"K. Kostohryz, V. Zhaivoronok, Yu.I. Khvastukhin, S. Román","doi":"10.33070/ETARS.1.2018.04","DOIUrl":"https://doi.org/10.33070/ETARS.1.2018.04","url":null,"abstract":"In dry desulfurization, for example, of gaseous combustion products of thermal power plants and incineration plants, calcium oxide CaO, as a product of firing of natural carbonate rocks, mainly limestones (CaCO3), is widely used. Firing technology, depending on the limestone heat treatment regimes, form a product with certain physicochemical properties: porosity, specific surface, shrinkage value, chemical activity. The influence of heat treatment conditions on the properties of the product obtained is studied. The possibility of fast low temperature heat treatment of finely dispersed limestone in a fluidized bed of an inert material to produce CaO of the required quality is shown. Research facility, technique for carrying out experiments and processing experimental data are described. As a result of the research, the degree of calcination of 80 % of fine limestone in a device with fluidized bed of inert material was achieved and the residence time of the particles in the inert layer was determined. Bibl. 10, Fig. 2, Tab. 1.","PeriodicalId":11558,"journal":{"name":"Energy Technologies & Resource Saving","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75329429","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 : 2018-12-20DOI: 10.33070/ETARS.1.2018.09
V. Korzhyk, V. Kolesnyk, V. Orlyk, V. Shevchenko, S. Kostash
Thermodynamic analysis of the high-toxic substances (hydrazine, dimethylhydrazine and dinitrogen tetroxide) thermal decomposition process contained in liquid mixtures in different concentrations was carried out. Calculations of equilibrium compositions were carried out in a wide temperature range for a steam-water plasmatron. The aim of the study was finding the operational parameter’s optimal range of values ensuring the complete decomposition of primary high-toxic components provided secondary harmful substances minimal formation and obtaining acceptance level of specific energy consumption. The methods of further harmful secondary emissions neutralization have been determined. Bibl. 9, Fig. 7.
{"title":"THERMODYNAMIC ANALYSIS OF HIGHLY TOXIC EFFLUENTS NEUTRALIZATION PROCESS","authors":"V. Korzhyk, V. Kolesnyk, V. Orlyk, V. Shevchenko, S. Kostash","doi":"10.33070/ETARS.1.2018.09","DOIUrl":"https://doi.org/10.33070/ETARS.1.2018.09","url":null,"abstract":"Thermodynamic analysis of the high-toxic substances (hydrazine, dimethylhydrazine and dinitrogen tetroxide) thermal decomposition process contained in liquid mixtures in different concentrations was carried out. Calculations of equilibrium compositions were carried out in a wide temperature range for a steam-water plasmatron. The aim of the study was finding the operational parameter’s optimal range of values ensuring the complete decomposition of primary high-toxic components provided secondary harmful substances minimal formation and obtaining acceptance level of specific energy consumption. The methods of further harmful secondary emissions neutralization have been determined. Bibl. 9, Fig. 7.","PeriodicalId":11558,"journal":{"name":"Energy Technologies & Resource Saving","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75170530","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 : 2018-12-20DOI: 10.33070/ETARS.1.2018.08
N. Gomelya, V. Ivanova
Processes of membrane water purification from heavy metal ions in highly diluted solutions were studied. It was shown that the productivity of the nanofiltration membrane OPMN-P in filtering highly diluted cadmium sulfate solutions main depends on the operating pressure and is close to the values obtained when distilled water is used. In the case of separation of copper, cadmium and lead ions at concentrations of – 0.1 mg/dm3, the membrane selectivity was very low and did not exceed 10 %. In some cases when complexons were used, the selectivity of the membrane was as high as 100 % while the initial concentration of metal ions decreased to 10–8 mg/dm3. In this case, metal ions accumulated in concentrates in equivalent amounts, which is important for concentrating metal ion solutions in cases where super super dilute solutions are analyzed. Bibl. 11, Fig. 7, Tab. 3.
{"title":"EVALUATION OF THE EFFECTIVENESS OF BAROMEMBRANE METHODS OF PURIFICATION WATER FROM HEAVY METAL IONS","authors":"N. Gomelya, V. Ivanova","doi":"10.33070/ETARS.1.2018.08","DOIUrl":"https://doi.org/10.33070/ETARS.1.2018.08","url":null,"abstract":"Processes of membrane water purification from heavy metal ions in highly diluted solutions were studied. It was shown that the productivity of the nanofiltration membrane OPMN-P in filtering highly diluted cadmium sulfate solutions main depends on the operating pressure and is close to the values obtained when distilled water is used. In the case of separation of copper, cadmium and lead ions at concentrations of – 0.1 mg/dm3, the membrane selectivity was very low and did not exceed 10 %. In some cases when complexons were used, the selectivity of the membrane was as high as 100 % while the initial concentration of metal ions decreased to 10–8 mg/dm3. In this case, metal ions accumulated in concentrates in equivalent amounts, which is important for concentrating metal ion solutions in cases where super super dilute solutions are analyzed. Bibl. 11, Fig. 7, Tab. 3.","PeriodicalId":11558,"journal":{"name":"Energy Technologies & Resource Saving","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84375160","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 : 2018-12-19DOI: 10.33070/ETARS.4.2018.06
I. Mikulionok
Advantages of use of a wood filler as a component of thermoplastic composite materials (TpCM) with use of a polymeric matrix are considered. The analysis of design of an area of preparation of wood and polymeric composition melt is made. Rational options of design of process of extrusion preparation and formation of TpCM are defined, their advantages and disadvantages are shown. The description of the industrial line for production of wood and polymeric sheets is provided. Recommendations about use of extrusive installations for processing TpCM are made (use of extrusion lines on the basis of a single-screw extruder, and for receiving production with increased requirements to quality – cascade schemes with a twin-screw extruder is preferable). Pictures of finished goods, and also rheological characteristics of wood and polymeric composition melt depending on structure and temperature are given. It is also shown that rheological characteristics of the filled TpCM with use of secondary polymeric raw materials can significantly differ from the corresponding characteristics of primary polymers. Bibl. 28, Fig. 2.
{"title":"RESOURCE-SAVING MANUFACTURING TECHNOLOGY OF WOOD-POLYMER SHEETS AND PROFILE PRODUCTS","authors":"I. Mikulionok","doi":"10.33070/ETARS.4.2018.06","DOIUrl":"https://doi.org/10.33070/ETARS.4.2018.06","url":null,"abstract":"Advantages of use of a wood filler as a component of thermoplastic composite materials (TpCM) with use of a polymeric matrix are considered. The analysis of design of an area of preparation of wood and polymeric composition melt is made. Rational options of design of process of extrusion preparation and formation of TpCM are defined, their advantages and disadvantages are shown. The description of the industrial line for production of wood and polymeric sheets is provided. Recommendations about use of extrusive installations for processing TpCM are made (use of extrusion lines on the basis of a single-screw extruder, and for receiving production with increased requirements to quality – cascade schemes with a twin-screw extruder is preferable). Pictures of finished goods, and also rheological characteristics of wood and polymeric composition melt depending on structure and temperature are given. It is also shown that rheological characteristics of the filled TpCM with use of secondary polymeric raw materials can significantly differ from the corresponding characteristics of primary polymers. Bibl. 28, Fig. 2.","PeriodicalId":11558,"journal":{"name":"Energy Technologies & Resource Saving","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91204516","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 : 2018-12-19DOI: 10.33070/ETARS.4.2018.04
V. Kolesnyk, V. Orlyk, V. Zhaivoronok
In the article the comparative analysis of energy consumption in the process of combustion of solid fuel containing sulfur compounds, while simultaneously feeding directly into the fire space of the boiler of carbonate sorbents (CaCO3, Ca(OH)2, CaO) for the absorption of formed sulfur dioxide, as is the case in dry methods of flue gas desulphurization, was presented. The calculations were made when supplying sorbents in a stoichiometric ratio and with a triple excess sorbent. It was shown that the energy costs for decomposition and heating of CaCO3 and Ca(OH)2 or only the heating of CaO when applied in the dry method desulphurization are practically compensated by the secondary reactions of the sequestration of sulfur dioxide. A simple and practical method for determining the temperature of a stationary state with simultaneous flow of coal combustion processes and sulfur dioxide chemisorption by carbonate sorbents was proposed, which is essential for choosing a temperature range in which sulfur is actively absorbed without decomposition of CaSO4 formed. Bibl. 6, Fig. 3, Tab. 1.
{"title":"THERMODYNAMIC EVALUATION OF THE USING OF CARBONATE SORBENTS IN DRY METHODS OF FLUE GAS DESULPHURIZATION","authors":"V. Kolesnyk, V. Orlyk, V. Zhaivoronok","doi":"10.33070/ETARS.4.2018.04","DOIUrl":"https://doi.org/10.33070/ETARS.4.2018.04","url":null,"abstract":"In the article the comparative analysis of energy consumption in the process of combustion of solid fuel containing sulfur compounds, while simultaneously feeding directly into the fire space of the boiler of carbonate sorbents (CaCO3, Ca(OH)2, CaO) for the absorption of formed sulfur dioxide, as is the case in dry methods of flue gas desulphurization, was presented. The calculations were made when supplying sorbents in a stoichiometric ratio and with a triple excess sorbent. It was shown that the energy costs for decomposition and heating of CaCO3 and Ca(OH)2 or only the heating of CaO when applied in the dry method desulphurization are practically compensated by the secondary reactions of the sequestration of sulfur dioxide. A simple and practical method for determining the temperature of a stationary state with simultaneous flow of coal combustion processes and sulfur dioxide chemisorption by carbonate sorbents was proposed, which is essential for choosing a temperature range in which sulfur is actively absorbed without decomposition of CaSO4 formed. Bibl. 6, Fig. 3, Tab. 1.","PeriodicalId":11558,"journal":{"name":"Energy Technologies & Resource Saving","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86940647","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 : 2018-12-19DOI: 10.33070/ETARS.4.2018.08
I. Sigal, A. Smikhula, O. Sigal, O. Marasin, E. S. Kernazhytska
During the combustion of natural gas and the supply of exhaust gases recirculation like a ballast was shown. It is necessary to take into account that they contain nitrogen oxides, mainly in the form of NO, which does not decompose in the combustion zone, but is added to nitrogen oxides that has been produced during burning of fuel. The combustion products are affordable, but not ideal ballast. As on the one side, they reduce the maximum temperature in the combustion zone and the concentration of reagents, i.e. reduces the formation of «thermal» NOx, on the other side, they add to the combustion zone an additional amount of nitric oxide, which is summed up with that has been formed during burning in the combustion chamber and also reducing the efficiency of the method. When the maximum temperature in the combustion zone is the highest and the entire volume of fuel and ballast before to the combustion is best mixed during recirculation of exhaust gases, their effect on the formation of nitrogen oxides is the highest. The most effective ballast that reduces the formation of NO during combustion is carbon dioxide, provided it is well pre-molecularly mixed with natural gas before to the combustiontion zone. Bibl. 16, Tab. 4, Fig. 2.
{"title":"FEATURES OF THE INFLUENCE OF RECIRCULATION OF COMBUSTION PRODUCTS ON THE FORMATION OF NITROGEN OXIDES IN BOILERS DURING BURNING NATURAL GAS","authors":"I. Sigal, A. Smikhula, O. Sigal, O. Marasin, E. S. Kernazhytska","doi":"10.33070/ETARS.4.2018.08","DOIUrl":"https://doi.org/10.33070/ETARS.4.2018.08","url":null,"abstract":"During the combustion of natural gas and the supply of exhaust gases recirculation like a ballast was shown. It is necessary to take into account that they contain nitrogen oxides, mainly in the form of NO, which does not decompose in the combustion zone, but is added to nitrogen oxides that has been produced during burning of fuel. The combustion products are affordable, but not ideal ballast. As on the one side, they reduce the maximum temperature in the combustion zone and the concentration of reagents, i.e. reduces the formation of «thermal» NOx, on the other side, they add to the combustion zone an additional amount of nitric oxide, which is summed up with that has been formed during burning in the combustion chamber and also reducing the efficiency of the method. When the maximum temperature in the combustion zone is the highest and the entire volume of fuel and ballast before to the combustion is best mixed during recirculation of exhaust gases, their effect on the formation of nitrogen oxides is the highest. The most effective ballast that reduces the formation of NO during combustion is carbon dioxide, provided it is well pre-molecularly mixed with natural gas before to the combustiontion zone. Bibl. 16, Tab. 4, Fig. 2.","PeriodicalId":11558,"journal":{"name":"Energy Technologies & Resource Saving","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90900225","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 : 2018-12-19DOI: 10.33070/ETARS.4.2018.05
V. Kotov, A. Nebesniy, M. Svyatenko, A. Khovavko, D. Filonenko
The possibility of increasing of a specific yield of carbon nanomaterial from the products of methane-air conversion through the use of spent gases recirculation is considered. The analysis of the influence of water vapor and carbon dioxide contained in the recirculated gases on the methane conversion has been performed. According to the developed calculation method, the assessment of changes in the main parameters of carbon material synthesis was done. Evaluation was performed depending on the degree of recirculation of spent gases in the transition and steady-state periods of the process. It is shown that the use of gas recirculation increases the specific yield of the carbon material, but in this case, due to the accumulation of nitrogen in the gas phase, there is a decrease in the productivity of the process for the resulting product. The evaluation of the productivity enhancing by rising of the gases pressure in the system was made. It has been established that in order to increase the specific yield of carbon material, the obtained converted gas and reusable recirculated gas should be subjected to deep purification from water vapor. Bibl. 16, Fig. 6, Tab. 2.
{"title":"CARBON NANOMATERIAL PRODUCTION FROM PRODUCTS OF METHANE-AIR CONVERSION WITH SPENT GASES RECIRCULATION","authors":"V. Kotov, A. Nebesniy, M. Svyatenko, A. Khovavko, D. Filonenko","doi":"10.33070/ETARS.4.2018.05","DOIUrl":"https://doi.org/10.33070/ETARS.4.2018.05","url":null,"abstract":"The possibility of increasing of a specific yield of carbon nanomaterial from the products of methane-air conversion through the use of spent gases recirculation is considered. The analysis of the influence of water vapor and carbon dioxide contained in the recirculated gases on the methane conversion has been performed. According to the developed calculation method, the assessment of changes in the main parameters of carbon material synthesis was done. Evaluation was performed depending on the degree of recirculation of spent gases in the transition and steady-state periods of the process. It is shown that the use of gas recirculation increases the specific yield of the carbon material, but in this case, due to the accumulation of nitrogen in the gas phase, there is a decrease in the productivity of the process for the resulting product. The evaluation of the productivity enhancing by rising of the gases pressure in the system was made. It has been established that in order to increase the specific yield of carbon material, the obtained converted gas and reusable recirculated gas should be subjected to deep purification from water vapor. Bibl. 16, Fig. 6, Tab. 2.","PeriodicalId":11558,"journal":{"name":"Energy Technologies & Resource Saving","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78567343","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 : 2018-12-19DOI: 10.33070/ETARS.4.2018.07
G. Tulsky, L. Lyashok, M. P. Osmanova
The possibility of chemical and electrochemical dissolution of secondary raw materials on the basis of tungsten carbides electrolytes from solutions of acids HNO3, HCl, H2SO4 has been considered. The influence of nature and concentration of electrolyte on the process of anodic dissolution of the alloy WC–Co has been studied. It has been established that the final product of the dissolution of the WC–Co alloy in acid solutions is the higher tungsten oxide WO3. The reduction of the electrochemical process efficiency in the series HNO3 + HF > HCl > H2SO4 has been shown. In order to obtain tungsten carbide or tungsten powder, during the electrochemical treatment of the WC–Co alloy, the introduction of an admixture-reductant in a solution of sulfate acid has been proposed for the preparation of tungsten powder. On the basis of the conducted studies, a working electrolyte has been selected which allows to obtain the target product WC or W. Bibl. 10, Fig. 6.
{"title":"PROCESSING OF TECHNOGENIC WASTES OF PSEUDOALLOYS WC–CO","authors":"G. Tulsky, L. Lyashok, M. P. Osmanova","doi":"10.33070/ETARS.4.2018.07","DOIUrl":"https://doi.org/10.33070/ETARS.4.2018.07","url":null,"abstract":"The possibility of chemical and electrochemical dissolution of secondary raw materials on the basis of tungsten carbides electrolytes from solutions of acids HNO3, HCl, H2SO4 has been considered. The influence of nature and concentration of electrolyte on the process of anodic dissolution of the alloy WC–Co has been studied. It has been established that the final product of the dissolution of the WC–Co alloy in acid solutions is the higher tungsten oxide WO3. The reduction of the electrochemical process efficiency in the series HNO3 + HF > HCl > H2SO4 has been shown. In order to obtain tungsten carbide or tungsten powder, during the electrochemical treatment of the WC–Co alloy, the introduction of an admixture-reductant in a solution of sulfate acid has been proposed for the preparation of tungsten powder. On the basis of the conducted studies, a working electrolyte has been selected which allows to obtain the target product WC or W. Bibl. 10, Fig. 6.","PeriodicalId":11558,"journal":{"name":"Energy Technologies & Resource Saving","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80668714","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 : 2018-12-18DOI: 10.33070/ETARS.4.2018.02
Yu.V. Ivanov, O. Pyatnychko, G. Zhuk, L. Onopa, S. P. Krushnevich, A. V. Verbovsky
The research of technological circuits of biomethane from biogas production with the use of the most widespread amine and water absorption processes of carbon dioxide and hydrogen sulfide removal from biogas is carried out. With the use of software modeling for the amine process, an effective absorbent MDEAmod — an aqueous solution of methyldiethanolamine and monoethanolamine is proposed. This absorbent can be effectively applied to a wide range of biogas and for a range of pressure practically from atmospheric to 0.28 MPa. At the same time, the heat load of desorber reboiler is less in 1.5–4 times compared with the use of monoethanolamine solutions.Comparison of energy costs for the production of biomethane using amine and water technology shows that taking into account the greater yield of biomethane in the amine process by 8–15 % than in water absorption (loss of CH4 due to dissolution in H2O), and the use of this difference to heat the amine desorber reboiler these costs are comparative. In the case of the need to produce carbon dioxide as a commodity product, the amine process has an advantage, since the CO2 achieved in this process has a concentration of 98 % versus 80 % when using water absorption. The obtained results of simulation of СО2 and H2S removal process by amine and water absorption can be used in technologies of biogas refining and production of biomethane - an analogue of natural gas, as well as carbon dioxide as a commercial product. Bibl. 24, Fig. 6, Tab. 4.
{"title":"SIMULATION OF CO2 AND H2S EXTRACTION PROCESSES FROM BIOGAS USING AMINE AND WATER ABSORPTION","authors":"Yu.V. Ivanov, O. Pyatnychko, G. Zhuk, L. Onopa, S. P. Krushnevich, A. V. Verbovsky","doi":"10.33070/ETARS.4.2018.02","DOIUrl":"https://doi.org/10.33070/ETARS.4.2018.02","url":null,"abstract":"The research of technological circuits of biomethane from biogas production with the use of the most widespread amine and water absorption processes of carbon dioxide and hydrogen sulfide removal from biogas is carried out. With the use of software modeling for the amine process, an effective absorbent MDEAmod — an aqueous solution of methyldiethanolamine and monoethanolamine is proposed. This absorbent can be effectively applied to a wide range of biogas and for a range of pressure practically from atmospheric to 0.28 MPa. At the same time, the heat load of desorber reboiler is less in 1.5–4 times compared with the use of monoethanolamine solutions.Comparison of energy costs for the production of biomethane using amine and water technology shows that taking into account the greater yield of biomethane in the amine process by 8–15 % than in water absorption (loss of CH4 due to dissolution in H2O), and the use of this difference to heat the amine desorber reboiler these costs are comparative. In the case of the need to produce carbon dioxide as a commodity product, the amine process has an advantage, since the CO2 achieved in this process has a concentration of 98 % versus 80 % when using water absorption. The obtained results of simulation of СО2 and H2S removal process by amine and water absorption can be used in technologies of biogas refining and production of biomethane - an analogue of natural gas, as well as carbon dioxide as a commercial product. Bibl. 24, Fig. 6, Tab. 4.","PeriodicalId":11558,"journal":{"name":"Energy Technologies & Resource Saving","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88252765","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：