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http://dx.doi.org/10.5855/ENERGY.2011.20.4.346

A Study on Char Oxidation Kinetics by Direct Measurement of Coal Ignition Temperature  

Kwon, Jong-Seo (Graduate School of Mechanical Engineering, Pusan National University)
Kim, Ryang-Gyoon (Graduate School of Mechanical Engineering, Pusan National University)
Song, Ju-Hun (School of Mechanical Engineering, Pusan National University)
Chang, Young-June (School of Mechanical Engineering, Pusan National University)
Jeon, Chung-Hwan (School of Mechanical Engineering, Pusan National University)
Publication Information
Journal of Energy Engineering / v.20, no.4, 2011 , pp. 346-352 More about this Journal
Abstract
The experiment was designed to study the char oxidation kinetics of pulverized coals commonly utilized in Korean power plants. The kinetics has been estimated using the Semenov's thermal spontaneous ignition theory adapted to coal char particle ignition temperature. The ignition temperature of coal char particle is obtained by a direct measurement of the particle temperature with photo detector as well as by means of a solid thermocouple which is used as both a heating and a measuring element. The ignition temperatures for subbituminous coal, Wira, and bituminous coal, Yakutugol, have been measured for 4 sizes in the range of 0.52-1.09 mm. The ignition temperature of the particle increases with the increasing diameter. The results were used to calculate the activation energy and the pre-exponential factor. As a result, the kinetic parameters are in an agreement with ones reported from other investigations.
Keywords
Coal char; Oxidation kinetics; Ignition temperature; Thermal spontaneous ignition theory;
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Times Cited By KSCI : 1  (Citation Analysis)
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