Search:
Computing and Library Services - delivering an inspiring information environment

Hypercrosslinked polystyrene sulphonic acid catalysts for the esterification of free fatty acids in biodiesel synthesis

Andrijanto, E., Dawson, E.A. and Brown, D.R. (2012) Hypercrosslinked polystyrene sulphonic acid catalysts for the esterification of free fatty acids in biodiesel synthesis. Applied Catalysis B: Environmental, 115-6. pp. 261-268. ISSN 09263373

[img]
Preview
PDF - Accepted Version
Download (851kB) | Preview

    Abstract

    New sulphonic acid catalysts supported on hypercrosslinked polystyrene have been studied in the esterification of oleic acid with methanol and in the rearrangement of α-pinene to camphene and limonenes. The catalysts have been characterised in terms of specific surface areas and porosities, affinities for water and for cylcohexane vapours, and both concentrations and strengths of acid sites. They have been compared with conventional macroporous polystyrene sulphonic acids (Amberlysts 15 and 35) and SAC-13, a composite between Nafion and silica. The results show that the hypercrosslinked polystyrene sulphonic acids, despite exhibiting relatively low concentrations of acid sites and acid site strengths below those of Amberlysts 15 and 35, are very much more catalytically active than conventional resins in reactions such as the esterification in which high acid site strengths are not required. It is thought that this is due to the highly accessible acid sites throughout the catalyst particles. Reusability studies are reported and it appears that the temperature at which the catalyst is used is important in controlling and minimising catalyst deactivation.

    Item Type: Article
    Additional Information: this is the author’s version of a work that was accepted for publication in Applied Catalysis B: Environmental. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Applied Catalysis B: Environmental Volumes 115–116, 5 April 2012, Pages 261–268 doi:10.1016/j.apcatb.2011.12.040
    Subjects: Q Science > QD Chemistry
    Schools: School of Applied Sciences
    Related URLs:
    Depositing User: Graham Stone
    Date Deposited: 11 Apr 2012 11:36
    Last Modified: 03 May 2012 16:05
    URI: http://eprints.hud.ac.uk/id/eprint/12664

    Document Downloads

    Downloader Countries

    More statistics for this item...

    Item control for Repository Staff only:

    View Item

    University of Huddersfield, Queensgate, Huddersfield, HD1 3DH Copyright and Disclaimer All rights reserved ©