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Supercritical extraction as an effective first-step in a maize stover biorefinery
University of York, UK.
Ecover Co-ordination Center NV, Belgium.
University of York, UK.
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Processum.
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2015 (English)In: RSC Advances, ISSN 2046-2069, E-ISSN 2046-2069, Vol. 5, no 54, p. 43831-43838Article in journal (Refereed) Published
Abstract [en]

Supercritical carbon dioxide (scCO<inf>2</inf>) has been investigated for the generation of valuable waxy compounds and as an added-value technology in a holistic maize stover biorefinery. ScCO<inf>2</inf> extraction and fractionation was carried out prior to hydrolysis and fermentation of maize stover. Fractionation of the crude extracts by scCO<inf>2</inf> resulted in wax extracts having different compositions and melting temperatures, enabling their utilisation in different applications. One such fraction demonstrated significant potential as a renewable defoaming agent in washing machine detergent formulations. Furthermore, scCO<inf>2</inf> extraction has been shown to have a positive effect on the downstream processing of the maize stover. Fermentation of the scCO<inf>2</inf> extracted maize stover hydrolysates exhibited a higher glucose consumption and greater potential growth for surfactant (in comparison with non-scCO<inf>2</inf> treated stover) axnd ethanol production (a 40% increase in overall ethanol production after scCO<inf>2</inf> pre-treatment). This work represents an important development in the extraction of high value components from low value wastes and demonstrates the benefits of using scCO<inf>2</inf> extraction as a first-step in biomass processing, including enhancing downstream processing of the biomass for the production of 2nd generation biofuels as part of an integrated holistic biorefinery.

Place, publisher, year, edition, pages
Royal Society of Chemistry , 2015. Vol. 5, no 54, p. 43831-43838
Keywords [en]
Bioconversion, Carbon dioxide, Ethanol, Extraction, Fermentation, Refining, Biomass processing, Detergent formulations, Downstream-processing, Ethanol production, Glucose consumption, Potential growth, Supercritical carbon dioxides, Supercritical extraction, Supercritical fluid extraction
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:ri:diva-43183DOI: 10.1039/c5ra07485aScopus ID: 2-s2.0-84929587441OAI: oai:DiVA.org:ri-43183DiVA, id: diva2:1385326
Available from: 2020-01-14 Created: 2020-01-14 Last updated: 2020-01-20Bibliographically approved

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