Chemical and Biochemical Engineering Quarterly最新文献_第7页

Dynamic Simulation, Parameter Optimization, and Control of a Reactive Distillation Column for Production of Isopropanol via Propylene Hydration 丙烯水合法生产异丙醇反应精馏塔的动态模拟、参数优化与控制

IF 1.5 4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2021-01-01 DOI: 10.15255/CABEQ.2020.1865

Bahareh Feizi-Afshar, A. Farzi

引用次数: 3

Support Vector Machine-based Soft Sensors in the Isomerisation Process 异构化过程中基于支持向量机的软传感器

IF 1.5 4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2021-01-01 DOI: 10.15255/CABEQ.2020.1825

S. Herceg, Z. U. Andrijic, N. Bolf

引用次数: 2

Homotopy Simulation of Dissipative Micropolar Flow and Heat Transfer from a Two-Dimensional Body with Heat Sink Effect 考虑吸热效应的二维物体耗散微极流和传热的同伦模拟

IF 1.5 4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2021-01-01 DOI: 10.15255/CABEQ.2020.1849

O. Bég, B. Vasu, A. Ray, T. Bég, A. Kadir, H. Leonard, R. Gorla

{"title":"Homotopy Simulation of Dissipative Micropolar Flow and Heat Transfer from a Two-Dimensional Body with Heat Sink Effect","authors":"O. Bég, B. Vasu, A. Ray, T. Bég, A. Kadir, H. Leonard, R. Gorla","doi":"10.15255/CABEQ.2020.1849","DOIUrl":"https://doi.org/10.15255/CABEQ.2020.1849","url":null,"abstract":"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.","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":"38 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87365451","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}

引用次数: 8

Effects of Imprinting and Water Activity on Transesterification and Thermostability with Lipases in Ionic Liquid 印迹和水活度对离子液体中脂肪酶酯交换和热稳定性的影响

IF 1.5 4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2021-01-01 DOI: 10.15255/CABEQ.2020.1899

M. Matsumoto, K. Nakao, Y. Tahara

{"title":"Effects of Imprinting and Water Activity on Transesterification and Thermostability with Lipases in Ionic Liquid","authors":"M. Matsumoto, K. Nakao, Y. Tahara","doi":"10.15255/CABEQ.2020.1899","DOIUrl":"https://doi.org/10.15255/CABEQ.2020.1899","url":null,"abstract":"The effect of bio-imprinting and water activity on catalytic activities and the thermostability of lipases was investigated for transesterification using vinyl acetate and benzyl alcohol as substrates in ionic liquid, [Cnmim][PF6] (n=4,6,8), and benzene. The catalytic activities were enhanced by imprinting in benzene and [C4mim][PF6], and the relations between the transesterification activities and the water activity in both solvents were approximately bell shaped. The reactivity of the transesterification in benzene was higher than that in [C4mim][PF6]. The effects of water activity and imprinting on the kinetic parameters in [C4mim][PF6] were examined. Without controlling the water content, the values of Km,VA and Km,BA (Michaelis constants of vinyl acetate and benzyl alcohol, respectively) decreased, and the values of Vm (maximum rate) increased by imprinting. On the other hand, by controlling the water content in the organic media, the values of Vm, Km,VA, and Km,BA increased by imprinting. The activities of lipase in ionic liquid are more strongly affected by water activity and imprinting than those in benzene. We observed effects of water activity on thermostability but none from imprinting.","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":"35 1","pages":"57-63"},"PeriodicalIF":1.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67064578","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}

引用次数: 0

Photocatalytic Oxidation of Rhodamine 6G Dye Using Magnetic TiO2@Fe3O4/FeZSM-5 磁性TiO2@Fe3O4/FeZSM-5光催化氧化罗丹明6G染料

IF 1.5 4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2021-01-01 DOI: 10.15255/CABEQ.2020.1909

M. Dükkancı

{"title":"Photocatalytic Oxidation of Rhodamine 6G Dye Using Magnetic TiO2@Fe3O4/FeZSM-5","authors":"M. Dükkancı","doi":"10.15255/CABEQ.2020.1909","DOIUrl":"https://doi.org/10.15255/CABEQ.2020.1909","url":null,"abstract":"Efficient decolorization of Rhodamine 6G dye (Rh 6G) using magnetic TiO2@ Fe3O4/FeZSM-5 photocatalyst was carried out in a batch reactor equipped with two visible lights (high-pressure Na lamps). The photocatalyst was synthesized and characterized by X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, diffuse reflectance spectroscopy and vibrating sample magnetometry. The effects of initial Rh 6G concentration, catalyst loading, and pH were investigated on photocatalytic oxidation of Rh 6G. Maximum decolorization of 98.2 % was found at optimum conditions of 20 ppm Rh 6G, 1 g L–1 of catalyst, and pH of 13.04. Central composite design was used for the optimization of photocatalytic degradation of Rh 6G. Predicted decolorization efficiencies were found to be in good agreement with experimental values with high regression coefficient of 98.8 %. In addition to color removal, the toxicity of the Rh 6G aqueous solution was significantly reduced after photocatalytic oxidation. Small reduction of activity (from 34.6 % to 30.5 %) showed the stability of the catalyst after three consecutive runs. Due to the magnetic property of the catalyst, it could be removed from the solution with the help of external magnetic field. This prevents the loss of catalyst and reduces the extra separation cost, which is desired in industrial or large-scale applications.","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":"92 1","pages":"17-29"},"PeriodicalIF":1.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67064134","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}

引用次数: 2

Preparation and Characterization of Electrospun PCL/Silk Fibroin Scaffolds 静电纺PCL/丝素蛋白支架的制备与表征

IF 1.5 4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2021-01-01 DOI: 10.15255/CABEQ.2020.1834

Emi Govorčin Bajsić, T. Grgurić, B. Mijović, I. Vrgoč Zimić, Tamara Dolenec, S. Kuzmić, Nikolina Mrkonjić, M. T. Trcin, I. Slivac, E. Zdraveva

{"title":"Preparation and Characterization of Electrospun PCL/Silk Fibroin Scaffolds","authors":"Emi Govorčin Bajsić, T. Grgurić, B. Mijović, I. Vrgoč Zimić, Tamara Dolenec, S. Kuzmić, Nikolina Mrkonjić, M. T. Trcin, I. Slivac, E. Zdraveva","doi":"10.15255/CABEQ.2020.1834","DOIUrl":"https://doi.org/10.15255/CABEQ.2020.1834","url":null,"abstract":"Natural polymer-based scaffolds are generally considered as favourable matrices for the adhesion and growth of cells in tissue repair. One of the most popular materials in this respect is silk fibroin, known for its wide usage in biomedical applications. This work focuses on the development of electrospun scaffolds based on poly(ε-caprolactone) (PCL) and silk fibroin (SF) evaluated regarding the SF effect on their morphology, surface wetting ability, thermal properties, and HaCaT model cell line biocompatibility. The study revealed that the lowest PCL/SF concentration resulted in highest bead-like morphology formation, relatively thick fibers with the presence of random beads in the case of PCL, while uniform and thinner fibers in the case of increasing PCL/SF content scaffolds. The addition of SF reduced the degree of crystallinity in the PCL due to the less organized crystal structure, and decreased its thermal stability. Both SEM and MTT analyses showed cell presence on all scaffolds three days after cell seeding. Although SF improved PCL hydrophilicity, as shown quantitatively by the MTT assay for improved cytocompatibility properties, more structured electrospun PCL/SF scaffold strategies are required.","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":"35 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67064297","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}

引用次数: 1

Polyhydroxyalkanoates – Linking Properties, Applications and End-of-life Options 聚羟基烷酸酯-连接属性，应用和寿命终止选项

IF 1.5 4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2020-11-04 DOI: 10.15255/cabeq.2020.1819

M. Koller, A. Mukherjee

{"title":"Polyhydroxyalkanoates – Linking Properties, Applications and End-of-life Options","authors":"M. Koller, A. Mukherjee","doi":"10.15255/cabeq.2020.1819","DOIUrl":"https://doi.org/10.15255/cabeq.2020.1819","url":null,"abstract":"When it comes to “bioplastics”, we currently notice an immense complexity of this topic, and, most of all, a plethora of contradictory legislations, which confuses or even misleads insufficiently informed consumers. The present article therefore showcases microbial polyhydroxyalkanoate (PHA) biopolyesters as the prime class of “bioplastics” sensu stricto. In particular, biodegradability of PHA as its central benefit in elevating the current plastic waste scenario is elaborated on the biochemical basis: this covers aspects of the enzymatic machinery involved both in intra- and extracellular PHA degradation, and environmental factors impacting biodegradability. Importantly, PHA degradability is contextualized with potential fields of application of these materials. It is further shown how the particularities of PHA in terms of feedstocks, mode of synthesis, degradability, and compostability differ from other polymeric materials sold as “bioplastics”, highlighting the unique selling points of PHA as “green” plastic products in the circular economy. Moreover, current standards, norms, and certificates applicable to PHA are presented as basis for a straight-forward, scientifically grounded classification of “bioplastics”.","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":"34 1","pages":"115-129"},"PeriodicalIF":1.5,"publicationDate":"2020-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47243964","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}

引用次数: 39

The Potential of Using Grapefruit Peel as a Natural Support for Yeast Immobilization During Beer Fermentation 利用葡萄柚皮作为啤酒发酵过程中酵母固定的天然载体的潜力

IF 1.5 4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2020-07-31 DOI: 10.15255/cabeq.2020.1808

W. Estela-Escalante, J. J. Pérez-Escalante, E. Fuentes-Navarro, R. M. Pinillos-Miñano

引用次数: 0

From Bio-waste to Bone Substitute 从生物垃圾到骨替代品

IF 1.5 4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2020-07-31 DOI: 10.15255/cabeq.2020.1783

A. Ressler, A. Gudelj, Karla Zadro, M. Antunović, M. Cvetnić, M. Ivanković, H. Ivanković

引用次数: 15

Valorization of Banana Peel for Citric Acid Production under Solid State Fermentation with Aspergillus niger 黑曲霉固态发酵生产柠檬酸的香蕉皮Valorization

IF 1.5 4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2020-04-19 DOI: 10.15255/cabeq.2019.1740

T. Chysirichote

引用次数: 4