Pub Date : 2021-10-20DOI: 10.15255/cabeq.2021.1913
A. B. Ani, H. Ale Ebrahim
Nowadays, protecting the environment is of utmost importance worldwide, and sulfur dioxide is one of the main pollutants in the atmosphere. This work proposes a new method for simultaneous SO2 removal by MgO, and production of magnesium sulfate in a packed bed reactor for which breakthrough curves have been obtained. Furthermore, the effect of important operating parameters, including temperature, SO2 concentration, and gaseous flow rate was investigated. Experiments showed that increasing the temperature improved the breakthrough lifetime, but the increase in concentration and flow rate reduced the lifetime. The experimental results were predicted successfully by applying the Random Pore Model (RPM). Finally, the Non-dominated Sorting Genetic Algorithm II (NSGA II) that is a technique for multi-objective optimization, was employed to determine the best operating parameters for SO2 removal by magnesium oxide in the packed bed reactor.
{"title":"Modeling and Multi-objective Optimization of a Packed Bed Reactor for Sulfur Dioxide Removal by Magnesium Oxide Using Non-dominated Sorting Genetic Algorithm II","authors":"A. B. Ani, H. Ale Ebrahim","doi":"10.15255/cabeq.2021.1913","DOIUrl":"https://doi.org/10.15255/cabeq.2021.1913","url":null,"abstract":"Nowadays, protecting the environment is of utmost importance worldwide, and sulfur dioxide is one of the main pollutants in the atmosphere. This work proposes a new method for simultaneous SO2 removal by MgO, and production of magnesium sulfate in a packed bed reactor for which breakthrough curves have been obtained. Furthermore, the effect of important operating parameters, including temperature, SO2 concentration, and gaseous flow rate was investigated. Experiments showed that increasing the temperature improved the breakthrough lifetime, but the increase in concentration and flow rate reduced the lifetime. The experimental results were predicted successfully by applying the Random Pore Model (RPM). Finally, the Non-dominated Sorting Genetic Algorithm II (NSGA II) that is a technique for multi-objective optimization, was employed to determine the best operating parameters for SO2 removal by magnesium oxide in the packed bed reactor.","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45476169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-01DOI: 10.15255/CABEQ.2020.1857
Leonard Javier Mamani-Asqui, Lucero Nataly Peredo-Berlanga, Francisco Javier Roque Rodríguez, Giancarlo Richard Salazar Banda
L. J. Mamani-Asqui,a L. N. Peredo-Berlanga,a F. J. Roque Rodríguez,a,b and G. R. Salazar-Bandac,d,* aAcademic Department of Chemical Engineering, Universidad Nacional de San Agustín de Arequipa, Arequipa 0401, Perú bPostgraduate Unit of the Faculty of Process Engineering, Universidad Nacional de San Agustín de Arequipa, Arequipa 0401, Perú cElectrochemistry and Nanotechnology Laboratory, Institute of Technology and Research (ITP), 49032-490, Aracaju-SE, Brazil dGraduate Program in Process Engineering (PEP), Universidade Tiradentes, 49032-490, Aracaju-SE, Brazil
{"title":"Vicia faba Crop Residues for Sustainable Electricity Generation Using a Sludge-based Microbial Fuel Cell","authors":"Leonard Javier Mamani-Asqui, Lucero Nataly Peredo-Berlanga, Francisco Javier Roque Rodríguez, Giancarlo Richard Salazar Banda","doi":"10.15255/CABEQ.2020.1857","DOIUrl":"https://doi.org/10.15255/CABEQ.2020.1857","url":null,"abstract":"L. J. Mamani-Asqui,a L. N. Peredo-Berlanga,a F. J. Roque Rodríguez,a,b and G. R. Salazar-Bandac,d,* aAcademic Department of Chemical Engineering, Universidad Nacional de San Agustín de Arequipa, Arequipa 0401, Perú bPostgraduate Unit of the Faculty of Process Engineering, Universidad Nacional de San Agustín de Arequipa, Arequipa 0401, Perú cElectrochemistry and Nanotechnology Laboratory, Institute of Technology and Research (ITP), 49032-490, Aracaju-SE, Brazil dGraduate Program in Process Engineering (PEP), Universidade Tiradentes, 49032-490, Aracaju-SE, Brazil","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":"34 1","pages":"289-296"},"PeriodicalIF":1.5,"publicationDate":"2021-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49663312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.15255/CABEQ.2020.1866
Aysu Ulusal, Cemre Avşar
One of the most important problems of the fertilizer industry is that fertilizers show caking tendency during transportation and storage. Caking occurs as a result of interaction at the contact points formed between solid fertilizer particles. These interactions, also called contact mechanisms, are activated by a number of properties that fertilizers have and by environmental conditions. Prevention of caking mechanism is a substantial research subject that directly affects the quality and financial value of the final product and ensures its applicability. Fertilizer in good quality can provide ease in agricultural applications, and directly affect plant nutrition and crop productivity. At this point, there are various promoter practices for obtaining the free-flowing property in fertilizers that can be maintained or suggested during or after production, both in industry and in R&D studies. In order to develop new process control points in the industry, it is important to understand the factors that cause caking and the mechanism of physicochemical interactions that progress depending on these factors. In addition, it is essential to improve the storage conditions of the fertilizer, as well as to maintain its quality until end-use. This paper focuses on the caking behavior of fertilizers in detail, giving brief information about the prevention of caking and various types of anticaking agents.
{"title":"Understanding Caking Phenomena in Industrial Fertilizers","authors":"Aysu Ulusal, Cemre Avşar","doi":"10.15255/CABEQ.2020.1866","DOIUrl":"https://doi.org/10.15255/CABEQ.2020.1866","url":null,"abstract":"One of the most important problems of the fertilizer industry is that fertilizers show caking tendency during transportation and storage. Caking occurs as a result of interaction at the contact points formed between solid fertilizer particles. These interactions, also called contact mechanisms, are activated by a number of properties that fertilizers have and by environmental conditions. Prevention of caking mechanism is a substantial research subject that directly affects the quality and financial value of the final product and ensures its applicability. Fertilizer in good quality can provide ease in agricultural applications, and directly affect plant nutrition and crop productivity. At this point, there are various promoter practices for obtaining the free-flowing property in fertilizers that can be maintained or suggested during or after production, both in industry and in R&D studies. In order to develop new process control points in the industry, it is important to understand the factors that cause caking and the mechanism of physicochemical interactions that progress depending on these factors. In addition, it is essential to improve the storage conditions of the fertilizer, as well as to maintain its quality until end-use. This paper focuses on the caking behavior of fertilizers in detail, giving brief information about the prevention of caking and various types of anticaking agents.","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":"34 1","pages":"209-222"},"PeriodicalIF":1.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67064494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.15255/CABEQ.2020.1872
R. Slimani, H. Hiyane, M. Haddad, S. Lazar, S. Antri, Y. Achour, M. Essoufy, S. Benkaddour, I. E. Ouahabi
R. Slimani,a I. El Ouahabi,b S. Benkaddour,b H. Hiyane,b M. Essoufy,a Y. Achour,c S. El Antri,b S. Lazar,b,* and M. El Haddadc aLaboratory of Spectroscopy, Molecular Modeling, Materials, Nanomaterials, Water & Environment-CERNE2D, Faculty of Sciences, Mohammed V University in Rabat, BP 1014RP, Rabat, Morocco bLaboratory of Biochemistry, Environment &Agroalimentary URAC36, Faculty of Sciences and Techniques, Hassan II University of Casablanca, BP 146, 20650, Mohammedia, Morocco cLaboratory of Analytical & Molecular Chemistry, Faculty Poly-Disciplinary of Safi, University of Cadi Ayyad, BP4162, 46000 Safi, Morocco
R. Slimani,a I. El Ouahabi,b S. Benkaddour,b H. Hiyane,b M. Essoufy,a Y. Achour,c S. El Antri,b S. Lazar,b，*和M. El Haddadc光谱学、分子建模、材料、纳米材料、水与环境cerne2d实验室，拉巴特穆罕默德五世大学理学院，BP 1014RP，摩洛哥拉巴特哈桑二世大学生物化学、环境与农业实验室，URAC36，科学与技术学院，BP 146,20650, Mohammedia，摩洛哥分析与分子化学实验室，萨菲大学多学科学院，BP4162, 46000萨菲，摩洛哥
{"title":"Removal Efficiency of Textile Dyes from Aqueous Solutions Using Calcined Waste of Eggshells as Eco-friendly Adsorbent","authors":"R. Slimani, H. Hiyane, M. Haddad, S. Lazar, S. Antri, Y. Achour, M. Essoufy, S. Benkaddour, I. E. Ouahabi","doi":"10.15255/CABEQ.2020.1872","DOIUrl":"https://doi.org/10.15255/CABEQ.2020.1872","url":null,"abstract":"R. Slimani,a I. El Ouahabi,b S. Benkaddour,b H. Hiyane,b M. Essoufy,a Y. Achour,c S. El Antri,b S. Lazar,b,* and M. El Haddadc aLaboratory of Spectroscopy, Molecular Modeling, Materials, Nanomaterials, Water & Environment-CERNE2D, Faculty of Sciences, Mohammed V University in Rabat, BP 1014RP, Rabat, Morocco bLaboratory of Biochemistry, Environment &Agroalimentary URAC36, Faculty of Sciences and Techniques, Hassan II University of Casablanca, BP 146, 20650, Mohammedia, Morocco cLaboratory of Analytical & Molecular Chemistry, Faculty Poly-Disciplinary of Safi, University of Cadi Ayyad, BP4162, 46000 Safi, Morocco","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":"35 1","pages":"43-56"},"PeriodicalIF":1.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67064505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.15255/CABEQ.2020.1863
Dahai Sun, Hui Tian, J. Sun, W. Xu
Cyclohexanol is an organic chemical intermediate product widely used in chemical industry and commonly produced by cyclohexene hydration. Because of the low mutual solubility of cyclohexene and water, the reaction is limited by chemical equilibrium, which has the disadvantage of low conversion of cyclohexene. In this paper, the hydration reaction of cyclohexene catalysed by A-36 cation exchange resin catalyst was analysed by Aspen Plus V8.6 simulation software in the presence of isophorone as cosolvent. The process model of synthesising cyclohexanol by catalytic distillation was verified by process experiments. The simulation experiments were carried out using the process model, and suitable operating conditions of the catalytic distillation column were obtained. These are: ketene feed ratio 1.5, alkene/water ratio 0.5, distillation stage trays 5, reaction stage trays 12, stripping stage trays 6, cyclohexene feed at the 18th tray, water and isophorone feed at the 5th tray, reflux ratio 3, feed ratio (D/F) 0.25. Under these operating conditions, the conversion of cyclohexene can reach 40.63 %.
环己醇是一种广泛应用于化工行业的有机化工中间体产品，通常采用环己烯水化法生产。由于环己烯与水的相互溶解度低，反应受到化学平衡的限制，具有环己烯转化率低的缺点。本文采用Aspen Plus V8.6模拟软件，对A-36阳离子交换树脂催化剂催化环己烯在异佛尔酮为助溶剂下的水化反应进行了分析。通过工艺实验验证了催化精馏法合成环己醇的工艺模型。利用该工艺模型进行了模拟实验，得到了适宜的催化精馏塔操作条件。这些是:烯酮进料比1.5，烯烃/水比0.5，蒸馏级塔板5，反应级塔板12，汽提级塔板6，环己烯进料在第18塔板，水和异佛尔酮进料在第5塔板，回流比3，进料比(D/F) 0.25。在此操作条件下，环己烯的转化率可达40.63%。
{"title":"Reactive Distillation for the Production of Cyclohexanol","authors":"Dahai Sun, Hui Tian, J. Sun, W. Xu","doi":"10.15255/CABEQ.2020.1863","DOIUrl":"https://doi.org/10.15255/CABEQ.2020.1863","url":null,"abstract":"Cyclohexanol is an organic chemical intermediate product widely used in chemical industry and commonly produced by cyclohexene hydration. Because of the low mutual solubility of cyclohexene and water, the reaction is limited by chemical equilibrium, which has the disadvantage of low conversion of cyclohexene. In this paper, the hydration reaction of cyclohexene catalysed by A-36 cation exchange resin catalyst was analysed by Aspen Plus V8.6 simulation software in the presence of isophorone as cosolvent. The process model of synthesising cyclohexanol by catalytic distillation was verified by process experiments. The simulation experiments were carried out using the process model, and suitable operating conditions of the catalytic distillation column were obtained. These are: ketene feed ratio 1.5, alkene/water ratio 0.5, distillation stage trays 5, reaction stage trays 12, stripping stage trays 6, cyclohexene feed at the 18th tray, water and isophorone feed at the 5th tray, reflux ratio 3, feed ratio (D/F) 0.25. Under these operating conditions, the conversion of cyclohexene can reach 40.63 %.","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":"34 1","pages":"223-232"},"PeriodicalIF":1.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67064371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.15255/CABEQ.2020.1864
Kavita Sharmaa, A. Srivastava, T. Sreekrishnan
The present study focuses on sustainable production of biodegradable polymers by Cupriavidus necator DSMZ 545 using glycerol as substrate. The batch growth and biopolymer production kinetics were established in a 7-L bioreactor, which resulted in a total biomass of 8.88 g L–1 and poly(3-hydroxybutyrate) (PHB) accumulation of 6.76 g L–1. The batch kinetic and independently acquired substrate inhibition data were then used to develop a mathematical model for PHB production process. This was eventually used to design different nutrient feeding strategies under constant feed rate, decreasing feed rate, and pseudo steady state of substrate (glycerol) to optimize the PHB production during fed-batch cultivation. Among all the fed-batch cultivation strategies, the highest PHB accumulation and productivity of 13.12 g L–1 and 0.27 g L–1 h–1, respectively, was achieved in fed-batch bioreactor cultivation where a pseudo steady state with respect to glycerol was maintained.
本文主要研究了以甘油为底物，利用Cupriavidus necator DSMZ 545可持续生产生物可降解聚合物。在7-L的生物反应器中建立了间歇生长和生物聚合物生产动力学，总生物量为8.88 g L-1，聚(3-羟基丁酸酯)(PHB)积累量为6.76 g L-1。然后利用间歇动力学和独立获得的底物抑制数据建立了PHB生产过程的数学模型。最终设计了定投喂率、降低投喂率和底物(甘油)伪稳态下的不同营养投料策略，以优化分批投料培养过程中PHB的产量。在所有补料间歇培养策略中，PHB积累量和生产力最高的是补料间歇生物反应器培养，分别为13.12 g L-1和0.27 g L-1 h-1，并保持甘油的准稳态。
{"title":"Model-based Optimization of Biopolymer Production from Glycerol","authors":"Kavita Sharmaa, A. Srivastava, T. Sreekrishnan","doi":"10.15255/CABEQ.2020.1864","DOIUrl":"https://doi.org/10.15255/CABEQ.2020.1864","url":null,"abstract":"The present study focuses on sustainable production of biodegradable polymers by Cupriavidus necator DSMZ 545 using glycerol as substrate. The batch growth and biopolymer production kinetics were established in a 7-L bioreactor, which resulted in a total biomass of 8.88 g L–1 and poly(3-hydroxybutyrate) (PHB) accumulation of 6.76 g L–1. The batch kinetic and independently acquired substrate inhibition data were then used to develop a mathematical model for PHB production process. This was eventually used to design different nutrient feeding strategies under constant feed rate, decreasing feed rate, and pseudo steady state of substrate (glycerol) to optimize the PHB production during fed-batch cultivation. Among all the fed-batch cultivation strategies, the highest PHB accumulation and productivity of 13.12 g L–1 and 0.27 g L–1 h–1, respectively, was achieved in fed-batch bioreactor cultivation where a pseudo steady state with respect to glycerol was maintained.","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":"35 1","pages":"65-80"},"PeriodicalIF":1.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67064426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.15255/CABEQ.2020.1901
H. S. Khwayyir, G. Maria, D. Dinculescu
Model-based evaluation of major accident consequences and effects occurring during the transport of dangerous substances presents a great interest, because it allows derivation of relevant conclusions on the cause-effect close relationship. Such a numerical (in-silico) analysis helps to improve safety regulations for the transport of hazardous substances aimed at preventing dramatic accidents causing many deaths, injuries, and structural damage. By using the standard TNT equivalency math model, coupled with the Probit functions technique, the consequences and effects of an accidental blast have been estimated.1,2 The approached case study here refers to the accidental explosion of a truck while transporting 20 t of ammonium nitrate (AN) in the proximity of Mihăileşti village (Romania) on 24 May 2004. The model-based simulated accident consequences and effects match the data taken on the spot after the accident. Multiple simulations lead to deriving relevant conclusions of practiced value for improving the transport safety of hazardous substances.
{"title":"Simulation of the Consequences of the Ammonium Nitrate Explosion Following the Truck Accident Next to MihDileEti Village (Romania) in 2004","authors":"H. S. Khwayyir, G. Maria, D. Dinculescu","doi":"10.15255/CABEQ.2020.1901","DOIUrl":"https://doi.org/10.15255/CABEQ.2020.1901","url":null,"abstract":"Model-based evaluation of major accident consequences and effects occurring during the transport of dangerous substances presents a great interest, because it allows derivation of relevant conclusions on the cause-effect close relationship. Such a numerical (in-silico) analysis helps to improve safety regulations for the transport of hazardous substances aimed at preventing dramatic accidents causing many deaths, injuries, and structural damage. By using the standard TNT equivalency math model, coupled with the Probit functions technique, the consequences and effects of an accidental blast have been estimated.1,2 The approached case study here refers to the accidental explosion of a truck while transporting 20 t of ammonium nitrate (AN) in the proximity of Mihăileşti village (Romania) on 24 May 2004. The model-based simulated accident consequences and effects match the data taken on the spot after the accident. Multiple simulations lead to deriving relevant conclusions of practiced value for improving the transport safety of hazardous substances.","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":"34 1","pages":"277-287"},"PeriodicalIF":1.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67064123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.15255/CABEQ.2020.1865
Bahareh Feizi-Afshar, A. Farzi
In this study, a reactive distillation column for production of isopropanol was investigated. Firstly, a dynamic model was developed for the process. The model of the process was then programmed, and the process simulated using a base case obtained from the literature. Results showed that distillate contained more than 58 mol% propylene-free isopropanol. In the next step, optimization of some operating variables was performed to maximize concentration of isopropanol in distillate with condenser temperature as constraint, which was considered to be above the freezing point of water. Several simulations were performed by changing operating parameters, and finally optimum isopropanol content in distillate was obtained above 58 mol%. Results of using classic controllers showed that PID controller had the best performance for both condenser temperature set-point tracking and disturbance rejection.
{"title":"Dynamic Simulation, Parameter Optimization, and Control of a Reactive Distillation Column for Production of Isopropanol via Propylene Hydration","authors":"Bahareh Feizi-Afshar, A. Farzi","doi":"10.15255/CABEQ.2020.1865","DOIUrl":"https://doi.org/10.15255/CABEQ.2020.1865","url":null,"abstract":"In this study, a reactive distillation column for production of isopropanol was investigated. Firstly, a dynamic model was developed for the process. The model of the process was then programmed, and the process simulated using a base case obtained from the literature. Results showed that distillate contained more than 58 mol% propylene-free isopropanol. In the next step, optimization of some operating variables was performed to maximize concentration of isopropanol in distillate with condenser temperature as constraint, which was considered to be above the freezing point of water. Several simulations were performed by changing operating parameters, and finally optimum isopropanol content in distillate was obtained above 58 mol%. Results of using classic controllers showed that PID controller had the best performance for both condenser temperature set-point tracking and disturbance rejection.","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":"34 1","pages":"233-242"},"PeriodicalIF":1.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67064444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.15255/CABEQ.2020.1825
S. Herceg, Z. U. Andrijic, N. Bolf
This paper presents the development of soft sensor empirical models using support vector machine (SVM) for the continual assessment of 2,3-dimethylbutane and 2-methylpentane mole percentage as important product quality indicators in the refinery isomerisation process. During the model development, critical steps were taken, including selection and pre-processing of the industrial process data, which are broadly discussed in this paper. The SVM model results were compared with dynamic linear output error model and nonlinear Hammerstein-Wiener model. Evaluation of the developed models on independent data sets showed their reliability in the assessment of the component contents. The soft sensors are to be embedded into the process control system, and serve primarily as a replacement during the process analysersb failure and service periods.
{"title":"Support Vector Machine-based Soft Sensors in the Isomerisation Process","authors":"S. Herceg, Z. U. Andrijic, N. Bolf","doi":"10.15255/CABEQ.2020.1825","DOIUrl":"https://doi.org/10.15255/CABEQ.2020.1825","url":null,"abstract":"This paper presents the development of soft sensor empirical models using support vector machine (SVM) for the continual assessment of 2,3-dimethylbutane and 2-methylpentane mole percentage as important product quality indicators in the refinery isomerisation process. During the model development, critical steps were taken, including selection and pre-processing of the industrial process data, which are broadly discussed in this paper. The SVM model results were compared with dynamic linear output error model and nonlinear Hammerstein-Wiener model. Evaluation of the developed models on independent data sets showed their reliability in the assessment of the component contents. The soft sensors are to be embedded into the process control system, and serve primarily as a replacement during the process analysersb failure and service periods.","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":"34 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67063840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.15255/CABEQ.2020.1849
O. Bég, B. Vasu, A. Ray, T. Bég, A. Kadir, H. Leonard, R. Gorla
Non-Newtonian flow from a wedge constitutes a fundamental problem in chemical engineering systems and is relevant to processing of polymers, coating systems, etc. Motivated by such applications, the homotopy analysis method (HAM) was employed to obtain semi-analytical solutions for thermal convection boundary layer flow of incompressible micropolar fluid from a two-dimensional body (wedge). Viscous dissipation and heat sink effects were included. The non-dimensional boundary value problem emerges as a system of nonlinear coupled ordinary differential equations, by virtue of suitable coordinate transformations. The so-called Falkner-Skan flow cases are elaborated. Validation of the HAM solutions was achieved with earlier simpler models, as well as with a Nakamura finite difference method for the general model. The micropolar model employed simulates certain polymeric solutions quite accurately, and features rotary motions of micro-elements. Primary and secondary shear stress, wall couple stress, Nusselt number, microrotation velocity, and temperature were computed for the effect of vortex viscosity parameter (micropolar rheological), Eckert number (viscous dissipation), Falkner-Skan (pressure gradient) parameter, micro-inertia density, and heat sink parameter. The special cases of Blasius and stagnation flow were also addressed. It was observed from the study that the temperature and thermal boundary layer thickness are both suppressed with increasing wedge parameter and wall heat sink effect, which is beneficial to temperature regulation in polymer coating dynamics. Further, strong reverse spin was generated in the microrotation with increasing vortex viscosity, which resulted in increase in angular momentum boundary layer thickness. Also, both primary and secondary skin friction components were reduced with increasing wedge parameter. Nusselt number was also enhanced substantially with greater wedge parameter.
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