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Title: Low-rank coal drying technologies - Current status and new developments
Authors: Karthikeyan, M. 
Zhonghua, W. 
Mujumdar, A.S. 
Keywords: Blending
Coal drying
Heat treatment
Low-rank coal
Moisture content
Spontaneous combustion
Issue Date: 2009
Citation: Karthikeyan, M., Zhonghua, W., Mujumdar, A.S. (2009). Low-rank coal drying technologies - Current status and new developments. Drying Technology 27 (3) : 403-415. ScholarBank@NUS Repository.
Abstract: Despite their vast reserves, low-rank coals are considered undesirable because their high moisture content entails high transportation costs, potential safety hazards in transportation and storage, and the low thermal efficiency obtained in combustion of such coals. Their high moisture content, greater tendency to combust spontaneously, high degree of weathering, and the dusting characteristics restrict widespread use of such coals. The price of coal sold to utilities depends upon the heating value of the coal. Thus, removal of moisture from low-rank coals (LRC) is an important operation. Furthermore, LRC can be used cost effectively for pyrolysis, gasification, and liquefaction processes. This article provides an overview the diverse processes - both those that utilize conventional drying technologies and those that is not yet commercialized and hence in need of R&D. Relative merits and limitations of the various technologies and the current state of their development are presented. Drying characteristics of low-rank coal as well as factors affecting drying characteristics of coal samples are also discussed.
Source Title: Drying Technology
ISSN: 07373937
DOI: 10.1080/07373930802683005
Appears in Collections:Staff Publications

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