Study on the reaction kinetics of petroleum coke char and nitrogen oxide on the temperature rang of fluidized bed

Based on the physical and chemical characteristics of petroleum coke char, the global kinetics of the heterogeneous reaction between petroleum coke chars and NO on the temperature range of fluidized bed were studied on with programmed-temperature thermogravimetric method. The effects of pyrolysis temperature and combustion processes on the reaction were also investigated. The results show that the reactivity of petroleum char to NO mostly depends on the pore structure, and the reaction is governed by the internal diffusion in the pore of petroleum coke char. According to the results of Coats-Redfern method. The heterogeneous reaction mechanism of JM char, GH char and WH char can be described by 1-(1-X)4, 1-(1-X)3and-ln(l-X)3, and the activation energy are 192, 17, 198.33 and 207.7 kJ/mol, respectively. Further more, the pyrolysis temperature has no influence on the reactivity of the chars, and the reactivity of char improves with the burn-out ratio.