scholarly journals Determination of External Mass Transfer Model for Hydrolysis of Jatropha Oil Using Immobilized Lipase in Recirculated Packed-Bed Reactor

2011 ◽  
Vol 01 (04) ◽  
pp. 289-298 ◽  
Author(s):  
Chong-Wan Cheng ◽  
Rahmath Abdulla ◽  
Rao. Rampally Sridhar ◽  
Pogaku Ravindra
Keyword(s):  
Immobilized Lipase ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Transfer Model ◽  
Jatropha Oil ◽  
Mass Transfer Model ◽  
External Mass Transfer ◽  
Hydrolysis Of ◽  
External Mass Transfer Model

External mass transfer model for the hydrolysis of palm olein using immobilized lipase

2008 ◽  
Vol 86 (4) ◽  
pp. 276-282 ◽  
Author(s):  
Yin Hoon Chew ◽  
Chew Tin Lee ◽  
Mohamad Roji Sarmidi ◽  
Ramlan Abdul Aziz ◽  
Firdausi Razali
Keyword(s):  
Mass Transfer ◽  
Palm Olein ◽  
Immobilized Lipase ◽  
Transfer Model ◽  
Mass Transfer Model ◽  
External Mass Transfer ◽  
Hydrolysis Of ◽  
External Mass Transfer Model

scholarly journals EXTERNAL MASS TRANSFER MODEL FOR DEGRADATION OF SIMULATED TEXTILE EFFLUENT IN PACKED BED REACTOR

2019 ◽  
Vol 14 (01) ◽  
pp. 254-260
Author(s):  
S. Rengadurai ◽  
B. Preetha ◽  
A. Ashok Kumar ◽  
K. Manikandan ◽  
P. Elavarasan
Keyword(s):  
Mass Transfer ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Textile Effluent ◽  
Transfer Model ◽  
Mass Transfer Model ◽  
External Mass Transfer ◽  
External Mass Transfer Model

scholarly journals External Mass Transfer Model for Hydrogen Peroxide Decomposition by Terminox Ultra Catalase in a Packed-Bed Reactor

2017 ◽  
Vol 38 (2) ◽  
pp. 307-319 ◽  
Author(s):  
Ireneusz Grubecki
Keyword(s):  
Mass Transfer ◽  
Reaction Rate ◽  
Packed Bed ◽  
Transfer Model ◽  
Mass Transfer Model ◽  
External Mass Transfer ◽  
Hydrogen Peroxide Decomposition ◽  
Reaction Rate Constants ◽  
Peroxide Decomposition ◽  
External Mass Transfer Model

Abstract It is known that external diffusional resistances are significant in immobilized enzyme packed-bed reactors, especially at large scales. Thus, the external mass transfer effects were analyzed for hydrogen peroxide decomposition by immobilized Terminox Ultra catalase in a packed-bed bioreactor. For this purpose the apparent reaction rate constants, kP, were determined by conducting experimental works at different superficial velocities, U, and temperatures. To develop an external mass transfer model the correlation between the Colburn factor, JD, and the Reynolds number, Re, of the type JD = K Re(n-1) was assessed and related to the mass transfer coefficient, kmL. The values of K and n were calculated from the dependence (am kp-1 - kR-1) vs. Re-1 making use of the intrinsic reaction rate constants, kR, determined before. Based on statistical analysis it was found that the mass transfer correlation JD = 0.972 Re-0.368 predicts experimental data accurately. The proposed model would be useful for the design and optimization of industrial-scale reactors.

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.

Modeling and Optimization of Lipase-Catalyzed Partial Hydrolysis for Diacylglycerol Production in Packed Bed Reactor

2016 ◽  
Vol 12 (7) ◽  
pp. 681-689 ◽  
Author(s):  
Eng-Tong Phuah ◽  
Yee-Ying Lee ◽  
Teck-Kim Tang ◽  
Oi-Ming Lai ◽  
Thomas Shean-Yaw Choong ◽  
...  
Keyword(s):  
Immobilized Enzyme ◽  
Rhizomucor Miehei ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Partial Hydrolysis ◽  
Optimal Conditions ◽  
Lack Of Fit ◽  
Bed Height ◽  
Hydrolysis Of ◽  
Quadratic Models

Abstract Response surface methodology (RSM) was employed to optimize the process variables namely packed bed height (cm) and flow rates (ml/min) on diacylglycerol (DAG) production via partial hydrolysis of palm oil using immobilized Rhizomucor miehei lipase in packed bed reactor (PBR). Quadratic models were successfully developed for both DAG(y) and unhydrolyzed triacylglycerol ((un)TAG) with determination coefficient (R2) of 0.9931 and 0.9986, respectively coupled with insignificant lack of fit (p > 0.05). Optimal conditions for DAG synthesis were evaluated to be 10 cm packed bed height and 3.8 ml/min flow rate. Immobilized enzyme can be reused up to 10 times without significant changes in enzymatic activity. The partial hydrolysis under studied was found to be mass transfer-controlled.

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