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Kinetics of free fatty acid esterification in used cooking oil using hypercrosslinked exchange resin as catalyst

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journal contribution
posted on 19.12.2016 by Sumaiya Z. Abidin, Goran Vladisavljevic, Basu Saha
A kinetic study of free fatty acid esterification was carried out using Purolite D5081 as a catalyst. Esterification reaction was carried out using 1.25% (w/w) catalyst loading, 6:1 methanol to oil feed mole ratio, 350 rpm stirring speed and reaction temperatures ranging from 323 - 335 K. The experimental data from the esterification reaction were fitted to three kinetic models: Pseudo Homogeneous (PH), Eley-Rideal(ER) and Langmuir-Hinshelwood-Hougen-Watson (LHHW) models. A built-in ODE45 solver in MATLAB 7.0 was used to numerically integrate the differential molar balances describing the concentration of FFA in the system. The influence of temperature on the kinetic constants was determined by fitting the results to the Arrhenius equation. Experimental data were successfully fitted by the PH model and a good agreement between the experimental and the calculated moles of FFA were observed for all the experimental data points. The activation energies for the esterification and hydrolysis reactions were found to be 53 and 107 kJ/mol, respectively. These results proved that the hydrolysis reverse reaction requires more energy to occur as compared to esterification reaction, hence validated the proposed model.

Funding

We gratefully acknowledge Purolite International Ltd.(late Dr. Jim Dale and Mr. Brian Windsor) for kindly supplying the catalysts for this research work and GreenFuel Oil Co. Ltd. for supplying the UCO. We would like to acknowledge UMP research grant RDU130311 for the conference budget allocation.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Chemical Engineering

Published in

International Journal of Chemical Engineering and Applications

Volume

7

Issue

5

Pages

295 - 298

Citation

ABIDIN, S.Z., VLADISAVLJEVIC, G.T. and SAHA, B., 2016. Kinetics of free fatty acid esterification in used cooking oil using hypercrosslinked exchange resin as catalyst. International Journal of Chemical Engineering and Applications, 7 (5), pp. 295 - 298.

Publisher

© International Journal of Chemical Engineering and Applications

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2016-10-31

Copyright date

2016

Notes

This is an open access article published in the International Journal of Chemical Engineering and Applications.

ISSN

2010-0221

Language

en

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