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Identification, quantification and Chrastil modelling of wheat straw wax extraction using supercritical carbon dioxide

Marriott, R. and Sin, E. and Hunt, A. and Clark, H. (2014) Identification, quantification and Chrastil modelling of wheat straw wax extraction using supercritical carbon dioxide. Comptes Rendus Chimie, 17 (3). pp. 293-300. DOI: 10.1016/j.crci.2013.12.001

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Abstract

Supercritical carbon dioxide (scCO2) can be used as a �green� selective solvent for extractions of wheat straw waxes. For the first time, the crude extraction yields of wheat straw waxes and the yields of a single high value group of components (wax esters) using various scCO2 conditions (305.15 to 373.15 K and 7.5 to 40 MPa) have been modelled using the Chrastil equation (Chrastil, 1982). The model accurately predicts both the crude yield and percentage of valuable wax esters within the extracts enabling maximum extraction efficiency. The key compounds within the waxes (fatty acids, sterols, fatty alcohols, wax esters, β-diketones and alkanes) have been identified and quantified. This study highlighted that, 14,16 hentriacontanedione was extracted at critical temperature and pressure in concentrations of 1000 μg.g�1 straw. This molecule could demonstrate significant potential as a natural chelate for metal recovery and also in the formation of super-hydrophobic coatings.

Item Type: Article
Subjects: Research Publications
Departments: College of Natural Sciences > The BioComposites Centre
Date Deposited: 17 Jul 2015 02:17
Last Modified: 23 Sep 2015 03:00
ISSN: 1631-0748
URI: http://e.bangor.ac.uk/id/eprint/4803
Identification Number: DOI: 10.1016/j.crci.2013.12.001
Publisher: Elsevier
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