采用向半焦中添加CeO2和MnO2两种催化剂的方法，通过热重分析（TGA）、扫描电子显微镜(SEM)和X射线光电子能谱(XPS)等技术，研究了添加剂种类及比例对催化半焦燃烧和脱硝的影响。结果表明：当添加质量分数为5%的CeO2催化剂时半焦的着火温度和燃尽温度分别降低了1和11 ℃，当添加质量分数为5%的MnO2催化剂时着火温度升高了11 ℃，燃尽温度降低了15 ℃，当添加质量分数为5%CeO2-5%MnO2的复合催化剂时着火温度和燃尽温度分别降低了20和26 ℃；当向半焦中添加质量分数分别为5%CeO2和5%MnO2的催化剂时NOx和CO的排放质量均有所下降，添加质量分数为5%CeO2-5%MnO2的复合催化剂时NOx和CO的排放质量显著降低，分别下降为79.19%和38.80%。这一研究表明，质量分数为5%CeO2-5%MnO2复合催化剂对促进半焦燃烧和提高脱硝效率具有一定的协同作用。

By adding two kinds of catalysts of CeO2 and MnO2 into semicoke, the effects of the types and proportions of catalysts on the catalytic combustion and denitration of semicoke were studied by thermogravimetric analysis(TGA),scanning electron microscopy(SEM)and Xray photoelectron spectroscopy(XPS).The results show that when adding CeO2 catalyst with 5% mass fraction, the ignition temperature and burnout temperature of semicoke reduce by 1 ℃ and 11 ℃ respectively. When adding MnO2 catalyst with 5% mass fraction, the ignition temperature increases by 11 ℃, and the burnout temperature decreases by 15 ℃. When adding the composite catalyst consisting of CeO2 with 5% mass fraction and MnO2 with 5% mass fraction, the ignition temperature and burnout temperature reduce by 20 ℃ and 26 ℃ respectively; When adding the catalyst consisting of CeO2 with 5% mass fraction and MnO2 with 5% mass fraction into the semicoke, the emission qualities of NOx and CO reduce slightly. When adding the composite catalyst of CeO2 with 5% mass fraction and MnO2 with 5% mass fraction, the emission qualities of NOx and CO decrease significantly, which reduce by 79.19% and 38.80% respectively. This research phenomenon illustrates that the composite catalyst of CeO2 with 5% mass fraction and MnO2 with 5% mass fraction has a certain synergistic effect on the combustion and denitration of semicoke.

TQ534

国家重点研发计划（2018YFB0605002）