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Transesterification of soybean oil catalyzed by potassium loaded on alumina as a solid-base catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
44171 46006 2006 8 PDF Available
Title
Transesterification of soybean oil catalyzed by potassium loaded on alumina as a solid-base catalyst
Abstract

Biodiesel fuel, consisting of methyl esters of long chain fatty acids produced by transesterification of vegetable oils or animal fats with methanol, is a promising alternative diesel fuel regarding the limited resources of fossil fuels and the environmental concerns. In this work, an environmentally benign process for the transesterification of soybean oil to methyl esters using alumina loaded with potassium as a solid base catalyst in a heterogeneous manner was developed. The catalyst loaded KNO3 of 35 wt.% on Al2O3, after being calcined at 773 K for 5 h, it was found to be the optimum catalyst, which can give the highest basicity and the best catalytic activity for this reaction. The effects of various reaction variables such as the catalyst loading, oil to methanol ratio, reaction time and temperature on the conversion of soybean oil were investigated. The catalysts were characterized by means of XRD, IR and Hammett titration method. The results indicated that K2O derived from KNO3 at high temperature and that the Al–O–K groups were, probably, the main reasons for the catalytic activity towards the reaction. The catalyst activity was correlated closely with its basicity as determined by the Hammett method.

Keywords
Heterogeneous catalyst; Transesterification; Biodiesel; Loading of KNO3 on Al2O3; Calcination
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Transesterification of soybean oil catalyzed by potassium loaded on alumina as a solid-base catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 300, Issue 1, 20 January 2006, Pages 67–74
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us