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CO2 Gasification Characteristics of Biomass Residues from Agricultural and Woody Production

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In this article, various chars were prepared at the pyrolysis temperature of 973–1,273 K, using the biomass residues (rice shell, rapeseed shell, and wood scrap) from agricultural and woody production as raw materials, and their CO2 gasification characteristics were mainly investigated from room temperature to 1,673 K by a non-isothermal method. The residues presented a very high content of volatile matters and their de-volatilization process was very easy. The order of the gasification activity of the three biomass residues was as follows: rapeseed shell > wood scrap > rice shell. The residues wholly presented quite high activity and their gasification activity was far higher than that of coal. Consequently, the residues were suitable to be used as fuels for the median temperature gasification. The apparent activation energies for the CO 2 gasification reaction of chars from these residues ranged from 282.05 to 363.72 kJ/mol. In addition, it was found that a marked compensation effect was also presented between the activation energy and the pre-exponential factor for the gasification reaction of chars from these residues.
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Keywords: CO2 gasification characteristics; agricultural and woody production; biomass residue; kinetic compensation effect; reaction kinetics

Document Type: Research Article

Affiliations: Department of Chemical Engineering for Energy Resources and Key Laboratory of Coal Gasification of Ministry of Education,East China University of Science and Technology, Shanghai, China

Publication date: March 15, 2013

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