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Carbon Catalyst from Corn Stover and its Application to Catalytic Microwave Pyrolysis

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

Citation:  Paper number  131594788,  2013 Kansas City, Missouri, July 21 - July 24, 2013. (doi: http://dx.doi.org/10.13031/aim.20131594788) @2013
Authors:   LEI ZHU, HANWU LEI, LU WANG, QUAN BU, YI WEI, YUPENG LIU, JING LIANG
Keywords:   Microwave Catalytic Pyrolysis Carbon Catalyst Surface Functional Group Corn Stover

Abstract. This study investigated catalytic microwave pyrolysis of Douglas fir sawdust pellets using carbon catalysts produced from corn stover. The effects of catalyst to biomass ratio on the bio-oil, syngas, and biochar yields were determined. Functional groups (carbonyls, phenolics, lactones, carboxyls) of carbon catalysts and GC/MS analysis were used to study the catalytic pyrolysis of Douglas fir sawdust pellets. Surface functional groups of carbon catalysts were quantified by titration with bases of different ionization potential before and after catalytic pyrolysis. GC/MS analysis results showed that the phenols and hydrocarbons in bio-oil increased with the increase of the carbon catalyst loading while the guaiacol decreased. Comparison between the carbon catalyst from before and after microwave catalytic pyrolysis showed that the variation in the amount of carbonyl group has a close relationship with the upgrading bio-oils. The carbon catalyst might be served as a cost-competitive catalyst in biomass conversion and bio-oil upgrading.

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