scholarly journals Classroom Analysis of a Packed Bed Reactor with and without the Use of Effectiveness Factor

2016 ◽  
Vol 07 (15) ◽  
pp. 2094-2106
Author(s):  
Sebastiao R. Ferreira
Keyword(s):  
Packed Bed ◽  
Effectiveness Factor ◽  
Packed Bed Reactor ◽  
Classroom Analysis

scholarly journals Pre-purification of Plantago lanceolata extracts with biologically active compounds using yeast cells

2018 ◽  
Vol 11 (2) ◽  
pp. 163-169
Author(s):  
Vladimír Štefuca ◽  
Lukáš Rada ◽  
Alžbeta Chochulová ◽  
Michal Rosenberg
Keyword(s):  
Mass Transfer ◽  
Plantago Lanceolata ◽  
Packed Bed ◽  
Point Of View ◽  
Production Costs ◽  
Biologically Active ◽  
Effectiveness Factor ◽  
Packed Bed Reactor ◽  
Yeast Cells ◽  
Immobilized Cell

AbstractLeaves of the plantPlantago lanceolatacontain many economically interesting bioactive compounds, among them aucubin and catalpol are the most attractive. However, soluble saccharides passing to water extracts during isolation complicate chromatographic purification of these compounds. Their degradation by microbial cells transforming, for example, glucose, fructose, or sucrose to ethanol could bring important production costs savings and improved final product quality. It has been shown that the best saccharide degradation in extracts is achieved with theSaccharomyces cerevisiaecells. The cells were very active also in their immobilized form and they were able to completely remove glucose from the extract within four hours in a packed bed reactor combined with a stirring system with infinite medium recirculation.A simple mathematical model involving reaction kinetics and mass transfer limitations in the cell particles was proposed for the evaluation of cell effectiveness in their immobilized form in term of effectiveness factor. Values of the effectiveness factor calculated from the model were far below 1, indicating strong mass transfer limitations of the reaction. The model is suitable for optimization of preparation of immobilized cell particles, mainly from the point of view of cell charge in particles.

Continuous production of a chiral amine in a packed bed reactor with co-immobilized amine dehydrogenase and formate dehydrogenase

2021 ◽  
Vol 407 ◽  
pp. 127065
Author(s):  
Robert D. Franklin ◽  
Joshua A. Whitley ◽  
Adam A. Caparco ◽  
Bettina R. Bommarius ◽  
Julie A. Champion ◽  
...  
Keyword(s):  
Formate Dehydrogenase ◽  
Continuous Production ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Chiral Amine ◽  
Amine Dehydrogenase

Rotating packed bed reactor for enzymatic synthesis of biodiesel

2017 ◽  
Vol 224 ◽  
pp. 292-297 ◽  
Author(s):  
Juntao Xu ◽  
Changsheng Liu ◽  
Meng Wang ◽  
Lei Shao ◽  
Li Deng ◽  
...  
Keyword(s):  
Enzymatic Synthesis ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Rotating Packed Bed

scholarly journals Oxidation of ethene in a wall-cooled packed-bed reactor

1994 ◽  
Vol 49 (24) ◽  
pp. 4725-4747 ◽  
Author(s):  
E.P.S. Schouten ◽  
P.C. Borman ◽  
K.R. Westerterp
Keyword(s):  
Packed Bed ◽  
Packed Bed Reactor

scholarly journals Continuous Production of Lipase-Catalyzed Biodiesel in a Packed-Bed Reactor: Optimization and Enzyme Reuse Study

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Hsiao-Ching Chen ◽  
Hen-Yi Ju ◽  
Tsung-Ta Wu ◽  
Yung-Chuan Liu ◽  
Chih-Chen Lee ◽  
...  
Keyword(s):  
Flow Rate ◽  
Immobilized Lipase ◽  
Continuous Production ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Molar Ratio ◽  
System Response ◽  
Biodiesel Synthesis ◽  
Substrate Molar Ratio ◽  
Molar Conversion

An optimal continuous production of biodiesel by methanolysis of soybean oil in a packed-bed reactor was developed using immobilized lipase (Novozym 435) as a catalyst in atert-butanol solvent system. Response surface methodology (RSM) and Box-Behnken design were employed to evaluate the effects of reaction temperature, flow rate, and substrate molar ratio on the molar conversion of biodiesel. The results showed that flow rate and temperature have significant effects on the percentage of molar conversion. On the basis of ridge max analysis, the optimum conditions were as follows: flow rate 0.1 mL/min, temperature52.1∘C, and substrate molar ratio 1 : 4. The predicted and experimental values of molar conversion were83.31±2.07% and82.81±.98%, respectively. Furthermore, the continuous process over 30 days showed no appreciable decrease in the molar conversion. The paper demonstrates the applicability of using immobilized lipase and a packed-bed reactor for continuous biodiesel synthesis.

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