文献类型：期刊文献

英文题名：A Novel MnOx-MoOx Codoped Iron-Based Catalyst for NH3-SCR with Superior Catalytic Activity over a Wide Temperature Range

作者：Zhang, Shuangshuang[1];Zhang, Qiyao[1];Hu, Xu[1];Huang, Yongmin[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Specially Funct Polymer Mat & Related Tech, Shanghai 200237, Peoples R China

年份：2024

卷号：63

期号：18

起止页码：8163

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20241816019740);WOS:【SCI-EXPANDED(收录号:WOS:001227811100001)】；

基金：This research was supported by the Fundamental Research Funds for the Central Universities (no. 222201817001) and the Shanghai Sailing Program (no. 21YF140800). The Research Centre of Analysis and Test of ECUST provided analysis assistance.

语种：英文

外文关键词：Additives - Catalyst activity - Iron - Iron alloys - Molybdenum oxide - Nitrogen oxides - Precipitation (chemical) - Reaction intermediates - Selective catalytic reduction - Surface reactions

摘要：MnOx and MoOx, as additives, have proved effective in enhancing the NH3 selective catalytic reduction activity of catalysts. In this study, a new Mn-Fe-Mo catalyst was prepared using both the precipitation method and impregnation method. The redox properties, surface acidity, and reaction intermediates of the prepared catalysts were analyzed using various techniques. The test results showed that the MFMo4 catalyst achieved a NOx conversion rate exceeding 90% over the temperature range of 120-390 degrees C, demonstrating high potential to replace V-based catalysts due to outstanding activity at both high and low temperatures. The addition of MoOx exerted a detrimental impact on the redox property and avoided the production of N2O, thereby enhancing the N-2 selectivity. Furthermore, the codoping of MnOx and MoOx inhibited the adsorption of NOx on the catalysts while resulting in an increased number of Lewis acid sites on the catalyst. This promoted its reaction via the Eley-Rideal mechanism, which played a crucial role in ensuring the catalyst had excellent SCR activity over a wide temperature range.