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Impact of Internal/External Diffusion on Gasification Reaction Rate Analysis of Coal Char in High Temperatures and Elevated pressures  

Kim, Gyeong-Min (School of Mechanical Engineering, Pusan Nat'l University)
Kim, Jin-Ho (School of Mechanical Engineering, Pusan Nat'l University)
Lisandy, Kevin Yohanes (School of Mechanical Engineering, Pusan Nat'l University)
Kim, Ryang-Gyoon (Research Institute of Industrial Science & Technology, PosCC)
Kim, Gyu-Bo (Pusan Clean Coal Center, Pusan National University)
Jeon, Chung-Hwan (School of Mechanical Engineering, Pusan Nat'l University)
Publication Information
Journal of the Korean Society of Combustion / v.21, no.4, 2016 , pp. 23-29 More about this Journal
Reactivity of gasification defined by bouardard reaction is critical parameter in efficiency of the gasifier. In this study, char reactivity of the gasification was derived from the experiments using the intrinsic reaction kinetics model. Pressurized wire mesh heating reactor (PWMR) can produce high temperature and high pressure conditions up to 50 atm and 1750 K, respectively and PWMR was designed to evaluate the intrinsic reaction kinetics of $CO_2$ gasification. In this study, Kideco and KCH (sub-bituminous Indonesian coal) were pulverized and converted into char. Experiments used the PWMR were conducted and the conditions of the temperature and pressure were 1373~1673 K, 1~40 atm. To distinguish the pressure effect from high pressurized condition, internal and external effectiveness factors were considered. Finally, the intrinsic kinetics of the Kideco and KCH coal char were derived from $n^{th}$ order reaction rate equations.
PWMR; Gasification; Char reaction rate; Intrinsic kinetic;
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