Gasification reactivity and kinetic parameters of coal chars for non-isothermal steam gasification
Ya-jie Wang1, Hai-bin Zuo1, Jun Zhao1, Guang-wei Wang2
1 State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China; 2 School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
Gasification reactivity and kinetic parameters of coal chars for non-isothermal steam gasification
Ya-jie Wang1, Hai-bin Zuo1, Jun Zhao1, Guang-wei Wang2
1 State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China; 2 School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
摘要 The gasification reactivity and kinetic parameters of coal chars for non-isothermal steam gasification were investigated. One kind of lignite and three kinds of bituminous coals were used as the samples, and their coal ranks follow the ascending order: XB< KL< ZJ< GD. As characterized by the comprehensive gasification index, the gasification reactivity of coal chars follows the descending order: XB>KL>ZJ>GD. Through systematically analyzing factors affecting gasification reactivity, it was ascertained that the gasification reactivity is mostly determined by the carbonaceous structure. The gasification reactivity is inversely proportional to the coal rank, and the higher the coal rank, the lower the gasification reactivity. A new kinetic model was proposed to calculate the kinetic parameters, in which the reaction order was considered as an unknown kinetic parameter. The reaction order n follows the ascending order: XB< KL<ZJ <GD, which are n = 1.00, n = 1.34, n = 1.83, and n = 2.63, respectively. It is proved that the reaction order is proportional to the coal rank, and the higher the coal rank, the higher the reaction order.
Abstract:The gasification reactivity and kinetic parameters of coal chars for non-isothermal steam gasification were investigated. One kind of lignite and three kinds of bituminous coals were used as the samples, and their coal ranks follow the ascending order: XB \ KL \ ZJ \ GD. As characterized by the comprehensive gasification index, the gasification reactivity of coal chars follows the descending order: XB [ KL [ ZJ [ GD. Through systematically analyzing factors affecting gasification reactivity, it was ascertained that the gasification reactivity is mostly determined by the carbonaceous structure. The gasification reactivity is inversely proportional to the coal rank, and the higher the coal rank, the lower the gasification reactivity. A new kinetic model was proposed to calculate the kinetic parameters, in which the reaction order was considered as an unknown kinetic parameter. The reaction order n follows the ascending order: XB \ KL \ ZJ \ GD, which are n = 1.00, n = 1.34, n = 1.83, and n = 2.63, respectively. It is proved that the reaction order is proportional to the coal rank, and the higher the coal rank, the higher the reaction order.
Ya-jie Wang,Hai-bin Zuo,Jun Zhao, et al. Gasification reactivity and kinetic parameters of coal chars for non-isothermal steam gasification[J]. Journal of Iron and Steel Research International, 2021, 28(1): 1-9.