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Energies 2015, 8(2), 1166-1180;

Hot Water Pretreatment of Boreal Aspen Woodchips in a Pilot Scale Digester

Department of Paper and Bioprocess Engineering, SUNY College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, NY 13210, USA
Author to whom correspondence should be addressed.
Academic Editor: Thomas E. Amidon
Received: 26 November 2014 / Revised: 23 January 2015 / Accepted: 27 January 2015 / Published: 3 February 2015
(This article belongs to the Special Issue Bioenergy and Biorefining)
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Hot water extraction of aspen woodchips was treated at about 160 °C for 2 h with a liquor-to-solid ratio of 4.76:1 in a 1.84 m3 batch reactor with external liquor circulation. Both five-carbon and six-carbon sugars are obtained in the extraction liquor. Xylose and xylooligomers are the main five-carbon sugar in the hot water extract, which reached a maximum concentration of 0.016 mol/L, and 0.018 mol/L, respectively. Minor monosaccharides including galactose, mannose, rhamnose, glucose, and arabinose are also obtained during the hot water extraction. Rhamnose is the main six-carbon sugar in the extraction liquor, which has a maximum concentration of 0.0042 mol/L. The variations of acetyl groups and formic acid are investigated due to their catalytic effect on the extraction reactions. Zeroth-order kinetics models are found to be adequate in describing the dissolved solids, acids, xylose, and xylooligomers. View Full-Text
Keywords: hot-water extraction; kinetics; aspen; xylose; xylooligomers hot-water extraction; kinetics; aspen; xylose; xylooligomers

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Yan, J.; Liu, S. Hot Water Pretreatment of Boreal Aspen Woodchips in a Pilot Scale Digester. Energies 2015, 8, 1166-1180.

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