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http://dx.doi.org/10.7464/ksct.2013.19.3.333

Characterization of CO2 Gasification of 17 Coals With Regard to Coal Rank  

Kim, Soohyun (Clean Fuel Department, Korea Institute of Energy Research)
Yoo, Jiho (Clean Fuel Department, Korea Institute of Energy Research)
Chun, Donghyuk (Clean Fuel Department, Korea Institute of Energy Research)
Lee, Sihyun (Clean Fuel Department, Korea Institute of Energy Research)
Rhee, Young Woo (Graduate school of Green Energy Technology, Chungnam National University)
Publication Information
Clean Technology / v.19, no.3, 2013 , pp. 333-341 More about this Journal
Abstract
This paper presents results on $CO_2$ gasification of 17 raw coals containing a wide range of volatile matter (21-57 wt%). The gasification is performed using a TGA under $CO_2$ and also under $N_2$ atmosphere. An amount of weight loss with increasing temperature is proportional to that of volatile matter in a coal under $N_2$ atmosphere. Reactivity of $CO_2$ gasification also increases with a content of volatile matter. However, the correlation is a little scattered. Oxygenated functional groups in a coal are generally reactive and therefore, an increase in O/C ratio leads to enhanced reactivity. However, $CO_2$ reactivity is affected by neither H/C ratio nor a content of ashes that possibly activate the gasification reaction. These findings are also applicable to steam coal gasification and the reactivity series are confirmed in the test at a fixed bed reactor.
Keywords
$CO_2$ gasification; Coal gasification; Coal rank; Pyrolysis; Volatile matter;
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