Sunday, May 4, 2008
4-41
Effects of Treatment Variables on Supercritical Gasification of High-Diversity Grassland Perennials
Bo Zhang, Zhigang Zhang, Marc Von Keitz, and Kenneth Valentas. BioTechnology Institute, University of Minnesota, 1479 Gortner Avenue, Suite 140, St. Paul, MN 55108
Low-input high-diversity (LIHD) mixtures of native grassland perennials were subjected to a supercritical treatment process with the aim of obtaining hydrogen rich gases. The process was optimized based on the following treatment variables: reaction temperature (374-575 °C, corresponding to a pressure range of 22-40MPa), residence time (10-30 min), biomass content in the feed, and catalysts (0-4% NaOH and solid alkali CaO-ZrO2). The gaseous phase from gasification of LIHD primarily consisted of hydrogen (H2), with a mixture of carbon monoxide (CO), methane (CH4), carbon dioxide (CO2), and a small amount of ethylene (C2H4) and ethane (C2H6). The statistical significance of treatment variables was evaluated using analysis of variance (ANONA) F test. It showed that both temperature and catalysts significantly affected gas yields (P<10-5), while biomass content in the feed and residence time were not significant at the level of P<0.01.
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See more of The 30th Symposium on Biotechnology for Fuels and Chemicals (May 4 -- 7, 2008)
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See more of The 30th Symposium on Biotechnology for Fuels and Chemicals (May 4 -- 7, 2008)