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Bioresource Technology, Vol.287, 2019
Pyrolysis of Chinese chestnut shells: Effects of temperature and Fe presence on product composition
To understand the role of Fe on biomass pyrolysis, Fe-catalyzed biomass pyrolysis in a fixed-bed reactor was investigated. It was found that the introduction of Fe increased the yields of gases and solid char while decreasing the yield of liquid oil. With increasing temperature, Hydrogen content in gaseous products obtained in the presence of Fe increased, while that of CH4 decreased. In the case of liquid oil, the introduction of Fe promoted the formation of ketones and acids at 400-600 degrees C, and these species became dominant (67.51%) at 700-800 degrees C. Finally, solid char obtained in the presence of Fe at 700-800 degrees C featured a larger pore volume, specific surface area, and graphitization degree, and was characterized by a mesoporous structure with narrow pores size distribution (similar to 5.3 nm).