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Reaction Rate Analysis of Combustion for Indonesian Coal Char Applied by External/Internal Diffusion
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  • Journal title : Korean Chemical Engineering Research
  • Volume 52, Issue 1,  2014, pp.133-140
  • Publisher : The Korean Institute of Chemical Engineers
  • DOI : 10.9713/kcer.2014.52.1.133
 Title & Authors
Reaction Rate Analysis of Combustion for Indonesian Coal Char Applied by External/Internal Diffusion
Hwang, Chan-Won; Kim, Ryang-Gyoon; Ryu, Kwang-Il; Wu, Ze-Lin; Jeon, Chung-Hwan;
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 Abstract
The experiment was designed to compare the char combustion kinetics of pulverized Indonesia coals commonly utilized in Korea power plants. The reaction rate of coal char has been formulated using the external and internal effectiveness factors to describe the diffusion effect quantitatively. The Random Pore Model (RPM) was used for applying internal specific surface area as a function of carbon conversion ratio. Reaction rate was obtained from reaction time using the Wire Heating Reactor (WHR) which can heat and measure the char particle temperature at the same time. BET and TGA were used to obtain physical properties such as internal specific surface area and structural parameter. Three kinds of Indonesia Sub-bituminous coals "BARAMULTI, ENERGYMAN, AGM" were used in order to derive the activation energy and pre-exponential factor. The results of this study showed that the effect of internal diffusion than that of external diffusion is the dominant as comparison of kinetics was reflected in external and internal effectiveness factors. For three kinds of coal char, finally, activation energy of intrinsic kinetics indicates 110~118 kJ/mol.
 Keywords
Coal Char;Reaction Rate;Kinetics;WHR;RPM;
 Language
Korean
 Cited by
1.
고온, 고압조건에서의 인도네시아 석탄촤의 CO2 가스화 반응,리산디케빈요하네스;김량균;황찬원;전충환;

대한기계학회논문집B, 2014. vol.38. 9, pp.781-787 crossref(new window)
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Gasification for Indonesian Coal Char at High Temperature and Elevated Pressure, Transactions of the Korean Society of Mechanical Engineers B, 2014, 38, 9, 781  crossref(new windwow)
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