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Vol. 31 No. 8 (2019): Vol 31 Issue 8

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Kinetic and Thermodynamic Studies of Microwave-Assisted Transesterification of Papaya Oil

https://doi.org/10.14233/ajchem.2019.21943
Milap G. Nayak
Department of Chemical Engineering, Vishwakarma Government Engineering College (Affliated to Gujarat Technological University), Chandkheda-382424, India
https://orcid.org/0000-0002-2730-7243
Amish P. Vyas
Department of Chemistry, Saffrony Institute of Technology (Affliated to Gujarat Technological University), At & P.-Linch, Mehsana-384435, India
https://orcid.org/0000-0001-8446-7975

Corresponding Author(s) : Milap G. Nayak

milapnayak0510@gmail.com

Asian Journal of Chemistry, Vol. 31 No. 8 (2019): Vol 31 Issue 8

Abstract

Microwave-assisted transesterification due to drastic reduction in reaction time when compared with conventional method gain the research attention. Pesent study explores the kinetic and thermodynamic study of microwave-assisted transesterification of non-edible papaya oil. The experiments were performed using pre-optimized process parameters having 9:1 molar ratio of methanol to oil, 1 wt. % NaOH catalyst. The experiments carried out in commercial microwave reactor with infrared temperature controller. Kinetic study of microwave-assisted palm oil methyl ester (POME) conversion was carried out by varying temperature from 50 to 65 ºC with an increment of 5 ºC. Kinetic study revealed that microwave-assisted homogeneous alkali-catalyzed transesterification follows first order having lower activation energy 27.86 KJ mol-1. Also, higher frequency factor 14764 min-1 and rate constant 0.6703 min-1 at 60 ºC revealed the non-thermal and thermal effect of the microwave. Other thermodynamic properties such as ΔG, ΔH and ΔS were found out to be 94.48 KJ/mol, 24.87 KJ/mol and -0.209 KJ/mol K, respectively, which show that reaction is non-spontaneous, endothermic and endergonic in nature.

Keywords

Papaya oil Biodiesel Microwave Transesterification
Nayak, M. G., & Vyas, A. P. (2019). Kinetic and Thermodynamic Studies of Microwave-Assisted Transesterification of Papaya Oil. Asian Journal of Chemistry, 31(8), 1688–1692. https://doi.org/10.14233/ajchem.2019.21943
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