Esterification and transesterification over SrO–ZnO/Al2O3 as a novel bifunctional catalyst for biodiesel production

Al-Saadi, Ali, Mathan, Bobby, and He, Yinghe (2020) Esterification and transesterification over SrO–ZnO/Al2O3 as a novel bifunctional catalyst for biodiesel production. Renewable Energy, 158. pp. 388-399.

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Abstract

A series of novel bifunctional catalysts (SrO–ZnO/Al2O3) have been synthesised via the wet impregnation method for biodiesel production. The basic and acidic activities of the prepared catalysts were investigated using corn oil and oleic acid, respectively. Physio-chemical characteristics of the synthesised catalysts were analysed by XRD, SEM-EDS, TGA-DSC, and FT-IR. 1H NMR was used for analysing the fatty acid ethyl ester and the free fatty acid. The catalyst exhibited higher catalytic activity in transesterification reaction, with 95.1% reaction conversion at operating conditions of 10:1 ethanol to corn oil molar ratio, 10 wt% catalyst loading, and 180 min at 70 °C. However, the conversion for esterification reaction was 71.4% at operating conditions 5:1 ethanol to corn oil molar ratio, 10 wt% catalyst loading, 6 h reaction time at 70 °C reaction temperature. The kinetic studies revealed that the transesterification and esterification reactions have good agreement with the first-order model.

Item ID: 66682
Item Type: Article (Research - C1)
ISSN: 1879-0682
Keywords: Acid-base catalyst, Corn oil, Heterogeneous catalyst, Oleic acid, Reaction kinetics, SrO–ZnO/Al O 2 3
Copyright Information: © 2020 Elsevier Ltd. All rights reserved.
Date Deposited: 11 May 2021 22:31
FoR Codes: 40 ENGINEERING > 4012 Fluid mechanics and thermal engineering > 401202 Bio-fluids @ 50%
40 ENGINEERING > 4099 Other engineering > 409999 Other engineering not elsewhere classified @ 50%
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