燃料化学学报2016，Vol.44Issue(11)：1388-1393,6.
不同分子筛负载锰铈催化剂的低温NH3-SCR脱硝性能
Performance of Mn-Ce catalysts supported on different zeolites in the NH3-SCR of NOx
摘要
Abstract
With various zeolites such as β, ZSM-5 and USY as the support, a series of Mn-Ce catalysts were prepared by impregnation method and characterized by XRD, BET, NH3-TPD, H2-TPR and XPS;their catalytic performance in the NH3-SCR of NOx at low temperature was investigated. The results show that all these catalysts are highly active in the NH3-SCR reaction at low temperature; especially, over the Mn-Ce/USY catalyst, the conversion of NOx reaches 90% at 107 ℃. After loaded of manganese and cerium, the specific surface area and pore volume of supported catalysts are decreased. Amorphous MnOx as the active component and crystalline CeO2 are detected on the surface of ZSM-5 zeolite. The weak acid sites on the catalyst surface probably play an important role in the NH3-SCR at low temperature. Meanwhile, a high atomic ratio of Mn4+/Mn3+ and concentration of adsorbed oxygen may also promote the NH3-SCR reaction at low temperature.关键词
NH3-SCR/锰/铈/分子筛/NOxKey words
NH3-SCR/manganese/cerium/zeolite/NOx分类
化学化工引用本文复制引用
黄增斌,李翠清,王振,徐胜美,冯凌波,王虹,宋永吉,张伟..不同分子筛负载锰铈催化剂的低温NH3-SCR脱硝性能[J].燃料化学学报,2016,44(11):1388-1393,6.基金项目
The project was supported by the National Natural Science Foundation of China(21343009).国家自然科学基金(21343009)资助 （21343009）
