August 22, 2014

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Liquefaction of Corn Cobs with Supercritical Water Treatment

Fei Yu, Roger Ruan, Paul Chen and Dajiang Zhao
Center for Biorefining
Department of Biosystems and Agricultural Engineering
University of Minnesota
1390 Eckles Ave., St. Paul, MN 55108, USA
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Abstract

Corncob powder was liquefied in a high pressure reactor. The composition of the gas and liquid
phases produced were analyzed. It was found that the yield of gas phase increased while the
yields of solid and liquid phase decreased with increasing temperature. The gas phase was 2.5 -
7.7% (wt%), the liquid phase 87.8 – 95.5% (wt%), and solid phase 1.56 – 4.7% (wt%) at 300 –
3750C. The gas phase consisted of hydrogen, carbon dioxide, carbon monoxide, alkane, and
olefin. The liquid phase consisted of phenols, furanmethanol, and related derived compounds.
Keywords: Liquefaction; Corn cob; Supercritical Water Treatment