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Transesterification of sunflower oil over zeolites using different metal loading: A case of leaching and agglomeration studies

Paper ID Volume ID Publish Year Pages File Format Full-Text
42987 45950 2008 7 PDF Available
Title
Transesterification of sunflower oil over zeolites using different metal loading: A case of leaching and agglomeration studies
Abstract

The aim of this study was to analyse the catalytic performance of several heterogeneous catalysts in the transesterification of sunflower oil with methanol. In order to characterize the different catalysts, nitrogen adsorption/desorption and CO2 temperature programmed desorption were used. The transesterification of sunflower oil was carried out using three different zeolites: mordenite, beta and X, to determine the influence of the kind of zeolite on the methyl ester production. The influence of the metal incorporation technique was studied using both impregnation and ion-exchange methods. Also, the transesterification reaction was carried out using catalysts with different metal loading. Finally, zeolite X was agglomerated with a binder, sodium bentonite, to study how the presence of a binder could change the catalytic performance of the zeolite. A methyl ester content of 93.5 and 95.1 wt% was obtained at 60 °C employing zeolite X with or without sodium bentonite, respectively. All biodiesel synthesized were characterized using the standard UNE-EN 14214. A complete deactivation study was carried out in order to check the sodium leaching from the catalyst. The results supported the hypothesis of a homogeneous-like mechanism where the alkali methoxide species were leached out.

Graphical abstractThe transesterification of sunflower oil was carried out using three different zeolites (mordenite, beta and X). A methyl ester content of 95.1 wt% was obtained at 60 °C employing zeolite X. The high catalytic activity of zeolite X gives processes competitive advantages over conventional processes based on homogeneous catalysis at the same temperature. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Transesterification; Biodiesel; Zeolites; Binder; Heterogeneous basic catalysis; Leaching
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Transesterification of sunflower oil over zeolites using different metal loading: A case of leaching and agglomeration studies
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 346, Issues 1–2, 31 August 2008, Pages 79–85
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