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Kinetics Analysis of Heterogeneous Oxidation of Coal Particles in Supercritical Water
Author(s) -
Ma Honghe,
Wang Shuzhong,
Zhou Lu,
Ma Suxia,
Fan Jiang,
Xu Donghai
Publication year - 2015
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201400278
Subject(s) - supercritical fluid , supercritical water oxidation , chemistry , kinetics , coal , particle (ecology) , mass transfer , chemical kinetics , particle size , heat transfer , reaction rate , chemical engineering , oxygen , thermodynamics , catalysis , chromatography , organic chemistry , physics , oceanography , quantum mechanics , engineering , geology
Little research has been conducted on the heterogeneous kinetics of coal oxidation in supercritical water (SCW). Therefore, the oxidation of coal particles in SCW coupled with heat and mass transfer was investigated. The real coal particle temperature was estimated in terms of a simplified heat balance. With increasing particle temperature, the rate‐limiting step of the oxidation reaction gradually changed from the surface reaction to the mass transfer of oxygen. According to this result, the reaction rate model was built. The model could be used to predict the quantitative relationship among the particle size, the particle temperature, and the time to complete oxidation.