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Vol.2 , No. 3, Publication Date: Apr. 21, 2015, Page: 87-94
 as heterogeneous catalyst has been developed. The model is based on the resverse mechanism of transesterification reactions and describes dynamic concentration changes of all the reactants and products. The study was conducted at the following reaction conditions: methanol to oil ratio (10:1); catalyst concentration (8wt %); time (1hr); temperature (55oC) and stirrer speed (700rpm). It was observed that the changes in concentration of all reactants and products as a function of time and temperature were highly significant between 0-25 minutes. The study also revealed that conversion of triglyceride to diglyceride was the rate determining step (RDS) and the effective rate constants for all the six reactions (reversible and irreversible) were favoured by high temperature. The observed kinetics was first order and the temperature dependent terms obtained using Arrhenius law revealed Activation energy of 14.80kJ/mol and frequency factor of 20.697s-1. The predictive power of the developed model was checked by fitting experimental data and revealed good correlation.&picture=http://www.aascit.org/aascit/decorators/img/journal/896.jpg)
| [1] | Mu’azu K., National Research Institute for Chemical Technology, Zaria, Nigeria. |
| [2] | Mohammed-Dabo I. A., Chemical Engineering Department, Ahmadu Bello University, Zaria, Nigeria. |
| [3] | Waziri S. M., Chemical Engineering Department, Ahmadu Bello University, Zaria, Nigeria. |
| [4] | Ahmed A. S., Chemical Engineering Department, Ahmadu Bello University, Zaria, Nigeria. |
| [5] | Bugaje I. M., National Research Institute for Chemical Technology, Zaria, Nigeria. |
| [6] | Zanna U. A. S., National Research Institute for Chemical Technology, Zaria, Nigeria. |
A mathematical model describing chemical kinetics of transesterification of jatropha curcas oil using calcium oxide (CaO) as heterogeneous catalyst has been developed. The model is based on the resverse mechanism of transesterification reactions and describes dynamic concentration changes of all the reactants and products. The study was conducted at the following reaction conditions: methanol to oil ratio (10:1); catalyst concentration (8wt %); time (1hr); temperature (55oC) and stirrer speed (700rpm). It was observed that the changes in concentration of all reactants and products as a function of time and temperature were highly significant between 0-25 minutes. The study also revealed that conversion of triglyceride to diglyceride was the rate determining step (RDS) and the effective rate constants for all the six reactions (reversible and irreversible) were favoured by high temperature. The observed kinetics was first order and the temperature dependent terms obtained using Arrhenius law revealed Activation energy of 14.80kJ/mol and frequency factor of 20.697s-1. The predictive power of the developed model was checked by fitting experimental data and revealed good correlation.
Keywords
Kinetic Modeling, Transesterification, Simulation, Jatropha Seed Oil, Heterogeneous Catalyst
Reference
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