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Language: English

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received September 26, 2003
Accepted December 29, 2003

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 unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Thermal and Chemical Desulfurization of Low Sulfur Coals

Young-Woo Nam^† Kye-Sung Park

Department of Chemical and Envionmental Engineering, Soongsil University, Seoul 156-743, Korea

Korean Journal of Chemical Engineering, March 2004, 21(2), 370-377(8), 10.1007/BF02705422

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Abstract

This paper describes desulfurization characteristics of low sulfur coals prior to combustion and optimum conditions of three different desulfurization processes. These processes include two thermal treatment processes (mild pyrolysis and air oxidation) and an H₂O₂ leaching process. Dual processes composed of thermal and leaching processes were also evaluated. Low sulfur coals employed were two imported bituminous coals and two domestic anthracite coals. The optimum reaction temperatures and times of the thermal processes were 500-550 ℃ and 15-20 minutes, respectively. The optimum condition for the leaching process was obtained when the experiment carried out for 60 min at 90 ℃ using 30% H₂O₂. The dual process showed the best sulfur removal efficiency as expected among the evaluated processes.

Keywords

Desulfurization Low Sulfur Coal Mild Pyrolysis Air Oxidation Leaching

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