DOI码：10.1016/j.fuel.2019.116380
发表刊物：FUEL
关键字：Coal catalytic combustion; Perovskite; Thermogravimetric analysis; Kinetic analysis.
摘要：Perovskite catalysts are increasingly devoted to the field of coal combustion due to their special crystal structure and excellent catalytic effect. In this study, the lanthanide perovskite type catalyst La(0.8-x)Sr0.2KxMnO3 (x is the doping amount of K+) was prepared by solgel method, and the effect of K+ amount on the catalytic activity for coal combustion was investigated in detail. The catalyst was well characterized and the thermal dynamic parameters of coal catalytic combustion were calculated by the single reaction (SR) model and the distributed activation energy (DAE) model. The results show that the doping amount of K+ affects the specific surface area and particle size of the catalyst, due to the relatively large ionic radius of K+ and the effect of doping on the valence of other cations. The highest combustion reaction rate was achieved over La0.66Sr0.2K0.14MnO3, and it will change the specific surface area and particle size of the catalyst extremely. The dynamic calculation shows that there is a compensation relationship between the activation energy and the frequency factor. The DAE model can get the variation of activation energy in different reaction stages, and the final calculation results are in good agreement with the experimental results.
论文类型：期刊论文
学科门类：工学
一级学科：动力工程及工程热物理
文献类型：J
是否译文：否
发表时间：2020-01-15
收录刊物：SCI