燃料化学学报2021，Vol.49Issue(7)：909-917,9.DOI:10.1016/S1872-5813(21)60106-8
Zr-TiO2催化剂对燃煤NO析出特性的影响及其催化机理
Effect of Zr-TiO2 catalyst on NO emission from coal-burning and its catalytic mechanism
摘要
Abstract
The effect of desulfurizer, modified TiO2 prepared by different methods on the NO emission from inferior coal burning and the adaptability of coal type were studied by using a tube furnace. The prepared Zr-TiO2 and the char were characterized by XRD, BET, SEM, XPS, TGA, and the mechanism of denitrification was explored. The results show that the addition of desulfurizer can promote NO emission. When the combustion temperature is 850 ℃, oxygen flow rate is 40 mL/min and the desulfurizer is MgO, the NO emission is the lowest as the catalyst of 5％ Zr-TiO2 prepared by impregnation method is added, which is 51.0％ lower than that with addition of pure TiO2 and 84.6％ lower than that with pure coal under the same conditions. The catalyst 5％ Zr-TiO2 can be applied to the coal with sulfur < 3％ and ash < 30％, having a wide application range. The doping of Zr can inhibit the growth of grain, enhance the active component, increase the content of adsorbed oxygen, promote the transformation of the valence states of the elements, accelerate the devolatilization of volatiles, promote the combustion, increase the specific surface area of chars, and enhance the ability of heterogeneous reduction of chars.关键词
劣质煤/NO析出特性/Zr-TiO2/催化作用Key words
inferior coal/NO emission characteristics/Zr-TiO2/catalysis分类
资源环境引用本文复制引用
王淑勤,付豪,程伟良,付懿..Zr-TiO2催化剂对燃煤NO析出特性的影响及其催化机理[J].燃料化学学报,2021,49(7):909-917,9.基金项目
The project was supported by the National Basic Research Program of China(2018YFB060420103). （2018YFB060420103）
