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Received July 25, 2014
Accepted December 8, 2014
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Gasification of ash-free coal prepared with microwave method
Department of Chemical Engineering, Hanbat National University, 125, Dongseodaero, Yuseong-gu, Daejeon 305-719, Korea
leecg@hanbat.ac.kr
Korean Journal of Chemical Engineering, September 2015, 32(9), 1784-1788(5), 10.1007/s11814-014-0370-2
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Abstract
The production of ash-free coal as a clean fuel for high temperature fuel cell was investigated. The ash-free coal was made from a bituminous coal. It was prepared by solvent extraction using a microwave. The solvent-to-coal ratio and microwave irradiation time of raw coal were parameters for the extraction yield. The microwave method showed merits in terms of faster extraction and higher extraction yield than conventional heating methods. In addition, gasification behaviors of the ash-free coal were investigated by gas chromatography. Contrary to carbon, ash-free coal showed hydrogen as a dominant gas species in its gasification and did not require carbonate catalyst. The electrical conductivity of ash-free coal was found very low close to zero.
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