Pub Date : 2020-01-01DOI: 10.15255/cabeq.2019.1673
M. Shamsi, H. A. Ebrahim, M. Azarhoosh
This paper presents process simulation and optimization of coal gasification process in a moving-bed reactor using Pittsburgh No. 8 coal as feed. The system of differential equations for the mass and energy balances was solved using 4th-order Runge-Kutta method and optimized by non-dominated sorting genetic algorithm-II (NSGA-II) method. The simulation was used to predict solid and gas temperature profile and gas composition along the reactor. The simulation results were compared successfully with experimental data relevant to Westfield plant in Scotland. In addition, the effect of operating parameters such as coal-to-oxygen molar ratio, steam-to-oxygen molar ratio, inlet gas temperature, reactor pressure, and oxygen mole fraction in inlet air on amount of synthesis gas (syngas) production, hydrogen to carbon monoxide molar ratio (HCMR) in produced syngas, and coal conversion was investigated. Finally, the reactor performance was optimized to produce the highest syngas production with a HCMR of two using NSGA-II method.
本文以匹兹堡8号煤为原料，对移动床反应器内的煤气化过程进行了模拟和优化。采用四阶龙格-库塔法求解质量平衡和能量平衡的微分方程组，并采用非支配排序遗传算法- ii (NSGA-II)方法进行优化。利用模拟方法预测了反应器沿线的固体和气体温度分布以及气体成分。模拟结果与苏格兰韦斯特菲尔德电厂的实验数据进行了比较。此外，还考察了煤氧摩尔比、蒸汽氧摩尔比、进气温度、反应器压力、进气氧摩尔分数等操作参数对合成气产量、合成气中氢与一氧化碳摩尔比和煤转化率的影响。最后，采用NSGA-II法对反应器性能进行了优化，使其在HCMR为2的情况下产生最高的合成气。
{"title":"Simulation and Optimization of Coal Gasification in a Moving-bed Reactor to Produce Synthesis Gas Suitable for Methanol Production Unit","authors":"M. Shamsi, H. A. Ebrahim, M. Azarhoosh","doi":"10.15255/cabeq.2019.1673","DOIUrl":"https://doi.org/10.15255/cabeq.2019.1673","url":null,"abstract":"This paper presents process simulation and optimization of coal gasification process in a moving-bed reactor using Pittsburgh No. 8 coal as feed. The system of differential equations for the mass and energy balances was solved using 4th-order Runge-Kutta method and optimized by non-dominated sorting genetic algorithm-II (NSGA-II) method. The simulation was used to predict solid and gas temperature profile and gas composition along the reactor. The simulation results were compared successfully with experimental data relevant to Westfield plant in Scotland. In addition, the effect of operating parameters such as coal-to-oxygen molar ratio, steam-to-oxygen molar ratio, inlet gas temperature, reactor pressure, and oxygen mole fraction in inlet air on amount of synthesis gas (syngas) production, hydrogen to carbon monoxide molar ratio (HCMR) in produced syngas, and coal conversion was investigated. Finally, the reactor performance was optimized to produce the highest syngas production with a HCMR of two using NSGA-II method.","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":"33 1","pages":"427-435"},"PeriodicalIF":1.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67063623","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 : 2020-01-01DOI: 10.15255/cabeq.2018.1553
J. Buchmaier, C. Brunner, U. Griesbacher, A. Phan, A. Harvey, G. R. Krishna, B. Nidetzky, B. Muster
J. Buchmaier,a,* C. Brunner,a U. Griesbacher,a A. N. Phan,b A. P. Harvey,b R. Krishna Gudiminchi,c B. Nidetzky,c and B. Mustera aIndustrial Processes and Energy Systems, AEE – Institute for Sustainable Technologies, 8200 Gleisdorf, Feldgasse 19, Austria bNewcastle University, Chemical Engineering and Advanced Materials, Newcastle upon Tyne NE1 7RU, United Kingdom cAustrian Center of Industrial Biotechnology, 14 Petersgasse, 8010 Graz, Austria
J. Buchmaier,a，* c . Brunner,a . Griesbacher,a . N. Phan,b . P. Harvey,b . Krishna Gudiminchi,c . Nidetzky,c和b . Mustera工业过程和能源系统，AEE -可持续技术研究所，8200 Gleisdorf, Feldgasse 19，奥地利;纽卡斯尔大学，化学工程与先进材料，ne17 ru，英国工业生物技术中心，14 Petersgasse, 8010 Graz，奥地利
{"title":"Oscillatory Flow Bioreactor (OFB) Applied in Enzymatic Hydrolysis at High Solid Loadings","authors":"J. Buchmaier, C. Brunner, U. Griesbacher, A. Phan, A. Harvey, G. R. Krishna, B. Nidetzky, B. Muster","doi":"10.15255/cabeq.2018.1553","DOIUrl":"https://doi.org/10.15255/cabeq.2018.1553","url":null,"abstract":"J. Buchmaier,a,* C. Brunner,a U. Griesbacher,a A. N. Phan,b A. P. Harvey,b R. Krishna Gudiminchi,c B. Nidetzky,c and B. Mustera aIndustrial Processes and Energy Systems, AEE – Institute for Sustainable Technologies, 8200 Gleisdorf, Feldgasse 19, Austria bNewcastle University, Chemical Engineering and Advanced Materials, Newcastle upon Tyne NE1 7RU, United Kingdom cAustrian Center of Industrial Biotechnology, 14 Petersgasse, 8010 Graz, Austria","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":"33 1","pages":"459-470"},"PeriodicalIF":1.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67064055","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 : 2020-01-01DOI: 10.15255/cabeq.2020.1824
J. Henrique, R. Sousa, A. Secchi, M. Ravagnani, Abdessamad Barbara, C. Costa
J. P. Henrique,a R. de Sousa Jr.,a,b A. R. Secchi,c M. A. S. S. Ravagnani,d A. Barbara,e and C. B. B. Costad,* aChemical Engineering Graduate Program, Universidade Federal de São Carlos (UFSCar), Rodovia Washington Luís (SP-310), km 235, São Carlos, SP, CEP: 13565-905, Brazil bChemical Engineering Department/UFSCar, Universidade Federal de São Carlos (UFSCar), Rodovia Washington Luís (SP-310), km 235, São Carlos, SP, CEP: 13565-905, Brazil cInstituto Alberto Luiz de Coimbra de Pós-Graduação e Pesquisa de Engenharia, COPPE, Universidade Federal do Rio de Janeiro, UFRJ, Cidade Universitária, Rio de Janeiro, RJ, CEP: 21941-972, Brazil dChemical Engineering Department, Universidade Estadual de Maringá, Av. Colombo, 5790 Bloco D90, CEP 87020-290, Maringá, PR, Brazil eInstitut de Mathématiques de Bourgogne (IMB), Université de Bourgogne, 9 avenue Alain Savary, 21078 Dijon cedex, France
的j·p·亨利·r·索萨Jr ., a、b a . r .西奇,c a d s m a s Ravagnani,芭芭拉,b和b和c Costad * aChemical工程研究生计划,联邦大学圣卡洛斯(UFSCar),华盛顿·路易斯(SP - -310)高速公路235公里,是卡洛斯SP -905,邮编:13565,巴西bChemical工程部门/ UFSCar联邦大学圣卡洛斯(UFSCar),华盛顿·路易斯(SP - -310)高速公路235公里,是卡洛斯SP,邮编:13565年到-905年,巴西cInstituto阿尔贝托·鲁兹Coimbra的研究生和工程研究,COPPE,巴西里约热内卢联邦大学的校园,在里约热内卢,r . j .,邮政编码:21941 -972,巴西dChemical工程部门,巴西州立大学哥伦布大道D90 5790多座,我87020年到-290年,巴西,因此,巴西eInstitut勃艮地的数学(IMB)勃艮第大学9大道21078第戎cedex阿兰•Savary法国
{"title":"Divided Wall Column Modeling and Simulation in an Open-Source Environment","authors":"J. Henrique, R. Sousa, A. Secchi, M. Ravagnani, Abdessamad Barbara, C. Costa","doi":"10.15255/cabeq.2020.1824","DOIUrl":"https://doi.org/10.15255/cabeq.2020.1824","url":null,"abstract":"J. P. Henrique,a R. de Sousa Jr.,a,b A. R. Secchi,c M. A. S. S. Ravagnani,d A. Barbara,e and C. B. B. Costad,* aChemical Engineering Graduate Program, Universidade Federal de São Carlos (UFSCar), Rodovia Washington Luís (SP-310), km 235, São Carlos, SP, CEP: 13565-905, Brazil bChemical Engineering Department/UFSCar, Universidade Federal de São Carlos (UFSCar), Rodovia Washington Luís (SP-310), km 235, São Carlos, SP, CEP: 13565-905, Brazil cInstituto Alberto Luiz de Coimbra de Pós-Graduação e Pesquisa de Engenharia, COPPE, Universidade Federal do Rio de Janeiro, UFRJ, Cidade Universitária, Rio de Janeiro, RJ, CEP: 21941-972, Brazil dChemical Engineering Department, Universidade Estadual de Maringá, Av. Colombo, 5790 Bloco D90, CEP 87020-290, Maringá, PR, Brazil eInstitut de Mathématiques de Bourgogne (IMB), Université de Bourgogne, 9 avenue Alain Savary, 21078 Dijon cedex, France","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":"34 1","pages":"149-167"},"PeriodicalIF":1.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67064081","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 : 2020-01-01DOI: 10.15255/cabeq.2019.1614
Z. Pilić, Ivana Martinović
The inhibition of copper corrosion by Helichrysum italicum extract (HI) in simulated acid rain was investigated using electrochemical techniques. Results indicate an increase in corrosion inhibition efficiency with the HI extract concentration. The inhibitive process was assumed to occur via adsorption of the extract on the metal surface. The thermodynamic data indicated physical adsorption and followed the Freundlich isotherm. The effect of temperature on the copper corrosion was studied. The value of the activation energy confirmed physisorption of extract molecules on the copper surface. The concentration of Cu ions released into solution, measured by atomic absorption spectrometry, was in accordance with the electrochemical results.
{"title":"Effect of Helichrysum italicum on the Corrosion of Copper in Simulated Acid Rain Solution","authors":"Z. Pilić, Ivana Martinović","doi":"10.15255/cabeq.2019.1614","DOIUrl":"https://doi.org/10.15255/cabeq.2019.1614","url":null,"abstract":"The inhibition of copper corrosion by Helichrysum italicum extract (HI) in simulated acid rain was investigated using electrochemical techniques. Results indicate an increase in corrosion inhibition efficiency with the HI extract concentration. The inhibitive process was assumed to occur via adsorption of the extract on the metal surface. The thermodynamic data indicated physical adsorption and followed the Freundlich isotherm. The effect of temperature on the copper corrosion was studied. The value of the activation energy confirmed physisorption of extract molecules on the copper surface. The concentration of Cu ions released into solution, measured by atomic absorption spectrometry, was in accordance with the electrochemical results.","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":"33 1","pages":"449-457"},"PeriodicalIF":1.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67063613","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 : 2020-01-01DOI: 10.15255/cabeq.2020.1826
G. Sangavi, Argho Bakshi, M. Ganapathy, N. Ganesan
All parts of the plantain are widely used in India for various purposes. But plantain leaf sheath always ends up as waste material which accumulates as a biowaste. The present study focuses on the preparation of activated carbon using phosphoric acid as activating agent, and its efficacy as an adsorbent for the removal of reactive dyes, Reactive Green 19, and Reactive Red 141. Batch adsorption studies have been conducted and optimum adsorption conditions were determined as a function of contact time, initial dye concentration, adsorbent dosage, and pH. The experimental data were analyzed using Langmuir, Freundlich and Temkin isotherm models. The pseudo-first and second-order, intraparticle diffusion, and Elovich models were used to analyze the kinetic parameters of the adsorption system. Under the optimum conditions (initial dye concentration = 200 mg L–1, adsorbent dose = 1 g, pH = 2, contact time = 220 min for reactive green 19 and 180 min for reactive red 141), maximum percentage removal for reactive green 19 and reactive red 141 were obtained as 65.9 % and 72.7 %, respectively. The results demonstrate that activated carbon produced from chemical activation of the plantain waste has the potential of adsorbing reactive dyes from industrial effluents.
{"title":"Adsorption of Reactive Dyes from Aqueous Solution Using Activated Carbon Prepared from Plantain Leaf Sheath Waste","authors":"G. Sangavi, Argho Bakshi, M. Ganapathy, N. Ganesan","doi":"10.15255/cabeq.2020.1826","DOIUrl":"https://doi.org/10.15255/cabeq.2020.1826","url":null,"abstract":"All parts of the plantain are widely used in India for various purposes. But plantain leaf sheath always ends up as waste material which accumulates as a biowaste. The present study focuses on the preparation of activated carbon using phosphoric acid as activating agent, and its efficacy as an adsorbent for the removal of reactive dyes, Reactive Green 19, and Reactive Red 141. Batch adsorption studies have been conducted and optimum adsorption conditions were determined as a function of contact time, initial dye concentration, adsorbent dosage, and pH. The experimental data were analyzed using Langmuir, Freundlich and Temkin isotherm models. The pseudo-first and second-order, intraparticle diffusion, and Elovich models were used to analyze the kinetic parameters of the adsorption system. Under the optimum conditions (initial dye concentration = 200 mg L–1, adsorbent dose = 1 g, pH = 2, contact time = 220 min for reactive green 19 and 180 min for reactive red 141), maximum percentage removal for reactive green 19 and reactive red 141 were obtained as 65.9 % and 72.7 %, respectively. The results demonstrate that activated carbon produced from chemical activation of the plantain waste has the potential of adsorbing reactive dyes from industrial effluents.","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":"34 1","pages":"169-180"},"PeriodicalIF":1.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67063674","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 : 2020-01-01DOI: 10.15255/cabeq.2019.1692
M. Matsumoto, Y. Matsumoto
To avoid the use of compounds that burden the environment, a solvent-free enzymatic reaction was the focus of this study. Investigated were the catalytic activities and kinetics of lipases that were pretreated with carboxylic acids for the solvent-free esterification of propionic acid with isoamyl alcohol. The enhancements of the esterification yields and rates by the bio-imprinting effects of carboxylic acids were observed. We found no inhibition of isoamyl alcohol on the solvent-free enzymatic esterification, and obtained a large imprinting effect under a largely excessive amount of isoamyl alcohol to propionic acid. From the kinetic analysis, the imprinting of lipases mainly enhanced the catalytic reaction rate constant rather than the affinity between lipase and propionic acid compared with untreated lipase. The bio-imprinting treatment of lipase is found to be very effective for the yield and kinetics in solvent-free esterification.
{"title":"Enzymatic Kinetics of Solvent-free Esterification with Bio-imprinted Lipase","authors":"M. Matsumoto, Y. Matsumoto","doi":"10.15255/cabeq.2019.1692","DOIUrl":"https://doi.org/10.15255/cabeq.2019.1692","url":null,"abstract":"To avoid the use of compounds that burden the environment, a solvent-free enzymatic reaction was the focus of this study. Investigated were the catalytic activities and kinetics of lipases that were pretreated with carboxylic acids for the solvent-free esterification of propionic acid with isoamyl alcohol. The enhancements of the esterification yields and rates by the bio-imprinting effects of carboxylic acids were observed. We found no inhibition of isoamyl alcohol on the solvent-free enzymatic esterification, and obtained a large imprinting effect under a largely excessive amount of isoamyl alcohol to propionic acid. From the kinetic analysis, the imprinting of lipases mainly enhanced the catalytic reaction rate constant rather than the affinity between lipase and propionic acid compared with untreated lipase. The bio-imprinting treatment of lipase is found to be very effective for the yield and kinetics in solvent-free esterification.","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":"33 1","pages":"495-499"},"PeriodicalIF":1.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67063696","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 : 2020-01-01DOI: 10.15255/cabeq.2019.1702
Y. Satyawali, L. Cauwenberghs, W. Dejonghe
Polyglycerol fatty acid esters, which have been widely used as emulsifiers in food, medicine and cosmetics industries, were the subject of solvent-free enzymatic synthesis in this study. There have been previous reports on enzymatic synthesis of various polyglycerol esters; however, this investigation extends the synthesis to PG-10 esters. The effects of substrate molar ratio, addition of emulsifiers to enhance mixing, and addition of molecular sieves or N2 flushing for water removal, was investigated. The solvent-free synthesis using N2 flushing leads to complete conversion of fatty acid, yielding a completely acid free product. The synthesis is validated for polyglycerol laurate and polyglycerol caprylate, both useful products in the cosmetic industry.
{"title":"Lipase-catalyzed Solvent-free Synthesis of Polyglycerol 10 (PG-10) Esters","authors":"Y. Satyawali, L. Cauwenberghs, W. Dejonghe","doi":"10.15255/cabeq.2019.1702","DOIUrl":"https://doi.org/10.15255/cabeq.2019.1702","url":null,"abstract":"Polyglycerol fatty acid esters, which have been widely used as emulsifiers in food, medicine and cosmetics industries, were the subject of solvent-free enzymatic synthesis in this study. There have been previous reports on enzymatic synthesis of various polyglycerol esters; however, this investigation extends the synthesis to PG-10 esters. The effects of substrate molar ratio, addition of emulsifiers to enhance mixing, and addition of molecular sieves or N2 flushing for water removal, was investigated. The solvent-free synthesis using N2 flushing leads to complete conversion of fatty acid, yielding a completely acid free product. The synthesis is validated for polyglycerol laurate and polyglycerol caprylate, both useful products in the cosmetic industry.","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":"33 1","pages":"501-509"},"PeriodicalIF":1.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67063807","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 : 2020-01-01DOI: 10.15255/cabeq.2019.1738
T. Keskin-Gundogdu
In this study, novel and conventional techniques for the production of bioethanol from fruit and vegetable wastes (FVWs) by yeast and bacterial fermentation were investigated experimentally. Different pretreatment techniques (acid, heat, acid/heat, and microwave) for yeast fermentation were compared. Maximum ethanol concentrations of 11.7 and 11.8 g L–1 were observed from acid/heat and microwave pretreatment, respectively, by using Saccharomyces cerevisiae. On the other hand, biochar production from FVWs and syngas fermentation from the waste gas of this process were integrated. From waste gas with 12 % CO content, 5.5 g L–1 and 2.5 g L–1 ethanol production was observed by using anaerobic mixed culture and Clostridium ljungdahlii, respectively. The overall results emphasize the potential of bioethanol production from FVWs by economically feasible and environmentally friendly methods.
本文研究了利用酵母和细菌发酵从果蔬废弃物中生产生物乙醇的新技术和传统技术。比较了酵母发酵的不同预处理技术(酸、热、酸/热和微波)。酸/热预处理和微波预处理的乙醇最高浓度分别为11.7和11.8 g L-1。另一方面，将FVWs生产生物炭与该工艺废气的合成气发酵相结合。以CO含量为12%的废气为原料，分别采用厌氧混合培养和隆达梭菌制备了5.5 g L-1和2.5 g L-1的乙醇。总体结果强调了通过经济可行和环境友好的方法从汽车生产生物乙醇的潜力。
{"title":"Comparison of Conventional and Novel Pre-treatment Methods for Bioethanol Production from Fruit and Vegetable Wastes","authors":"T. Keskin-Gundogdu","doi":"10.15255/cabeq.2019.1738","DOIUrl":"https://doi.org/10.15255/cabeq.2019.1738","url":null,"abstract":"In this study, novel and conventional techniques for the production of bioethanol from fruit and vegetable wastes (FVWs) by yeast and bacterial fermentation were investigated experimentally. Different pretreatment techniques (acid, heat, acid/heat, and microwave) for yeast fermentation were compared. Maximum ethanol concentrations of 11.7 and 11.8 g L–1 were observed from acid/heat and microwave pretreatment, respectively, by using Saccharomyces cerevisiae. On the other hand, biochar production from FVWs and syngas fermentation from the waste gas of this process were integrated. From waste gas with 12 % CO content, 5.5 g L–1 and 2.5 g L–1 ethanol production was observed by using anaerobic mixed culture and Clostridium ljungdahlii, respectively. The overall results emphasize the potential of bioethanol production from FVWs by economically feasible and environmentally friendly methods.","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":"33 1","pages":"471-483"},"PeriodicalIF":1.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67063887","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 : 2020-01-01DOI: 10.15255/cabeq.2020.1781
F. Strniša, P. Žnidaršič-Plazl, I. Plazl
The benefits of continuous processing and the challenges related to the integration with efficient downstream units for end-to-end manufacturing have spurred the development of efficient miniaturized continuously-operated separators. Membrane-free microseparators with specifically positioned internal structures subjecting fluids to a capillary pressure gradient have been previously shown to enable efficient gas-liquid separation. Here we present initial studies on the model-based design of a liquid-liquid microseparator with pillars of various diameters between two plates. For the optimization of in silico separator performance, mesoscopic lattice-Boltzmann modeling was used. Simulation results at various conditions revealed the possibility to improve the separation of two liquids by changing the geometrical characteristics of the microseparator.
{"title":"Lattice Boltzmann Modeling-based Design of a Membrane-free Liquid-liquid Microseparator","authors":"F. Strniša, P. Žnidaršič-Plazl, I. Plazl","doi":"10.15255/cabeq.2020.1781","DOIUrl":"https://doi.org/10.15255/cabeq.2020.1781","url":null,"abstract":"The benefits of continuous processing and the challenges related to the integration with efficient downstream units for end-to-end manufacturing have spurred the development of efficient miniaturized continuously-operated separators. Membrane-free microseparators with specifically positioned internal structures subjecting fluids to a capillary pressure gradient have been previously shown to enable efficient gas-liquid separation. Here we present initial studies on the model-based design of a liquid-liquid microseparator with pillars of various diameters between two plates. For the optimization of in silico separator performance, mesoscopic lattice-Boltzmann modeling was used. Simulation results at various conditions revealed the possibility to improve the separation of two liquids by changing the geometrical characteristics of the microseparator.","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":"34 1","pages":"73-78"},"PeriodicalIF":1.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67063910","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 : 2020-01-01DOI: 10.15255/cabeq.2020.1797
E. Mourid, M. Lakraimi, L. Benaziz, M. Cherkaoui
Clofibric acid (CA) is widely used as regulator of lipid levels in blood; it is considered one of the residual drugs that have a high persistence in the aquatic environment. After wastewater treatment, only a small amount of CA can be removed. The aim of this work was to investigate the reduction of CA in contaminated wastewater using calcined anionic clay ZnAl-CO3, which was chosen for its higher adsorption capacity, recyclability, and non-regeneration of sludge. The maximum retention amount, Qm, exceeded 2220 mg g–1, and the value of DH° suggested a physical process. The removal rate achieved 90 %, and the remaining quantity was widely below the tolerance thresholds. Retention was achieved by hydrogen bonds and electrostatic interactions between the adsorbate molecules. Recycling tests clearly suggested that this material is recyclable, promising, and very effective compared to other adsorbents. This retention contributes to the attenuation of persistent lipid regulator.
{"title":"Removal Efficiency of Lipid-regulating Drug Clofibric Acid from the Aquatic Environment by Calcined Anionic Clay ZnAl-CO3","authors":"E. Mourid, M. Lakraimi, L. Benaziz, M. Cherkaoui","doi":"10.15255/cabeq.2020.1797","DOIUrl":"https://doi.org/10.15255/cabeq.2020.1797","url":null,"abstract":"Clofibric acid (CA) is widely used as regulator of lipid levels in blood; it is considered one of the residual drugs that have a high persistence in the aquatic environment. After wastewater treatment, only a small amount of CA can be removed. The aim of this work was to investigate the reduction of CA in contaminated wastewater using calcined anionic clay ZnAl-CO3, which was chosen for its higher adsorption capacity, recyclability, and non-regeneration of sludge. The maximum retention amount, Qm, exceeded 2220 mg g–1, and the value of DH° suggested a physical process. The removal rate achieved 90 %, and the remaining quantity was widely below the tolerance thresholds. Retention was achieved by hydrogen bonds and electrostatic interactions between the adsorbate molecules. Recycling tests clearly suggested that this material is recyclable, promising, and very effective compared to other adsorbents. This retention contributes to the attenuation of persistent lipid regulator.","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":"34 1","pages":"79-92"},"PeriodicalIF":1.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67063917","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}
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