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Mild Solvent Extraction of Wood Waste

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Paper number  036019,  2003 ASAE Annual Meeting . (doi: 10.13031/2013.15046) @2003
Authors:   Czarena Crofcheck, Michael D. Montross, Adam Berkovich, Rodney Andrews
Keywords:   biomass conversion, thermochemical conversion, biobased materials, pitch

Mild solvent extraction (MSE) is an extractive process that has been previously used to directly convert coal to liquid products, gases, and solid chars. The MSE of white oak flour was investigated at three temperatures 300, 350, and 425 C and of red oak particles at a single temperature, 350 C. For white oak, the intermediate temperature of 350 C achieved a biomass conversion of 99%, producing 189 g of pitch from a biomass charge of 298 g, with a solvent loss of 29%. MSE of the red oak particles at the same temperature achieved a biomass conversion of 94%, producing 338 g of pitch with a solvent loss of 37%. These results indicate that this process can be utilized with a biomass feedstock, where performance will depend on biomass characteristics, processing temperature, and particle size. Future studies will focus on the optimization of product yield and distribution, while minimizing solvent loss.

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