文献类型：期刊文献

英文题名：Effect of SO2 on Activated Carbon Honeycomb Supported CeO2-MnOx Catalyst for NO Removal at Low Temperature

作者：Wang, Yanli[1];Li, Xiaoxiao[1];Zhan, Liang[1];Li, Cui[1];Qiao, Wenming[1];Ling, Licheng[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Key Lab Specially Funct Polymers & Related Techno, Minist Educ, Shanghai 200237, Peoples R China

年份：2015

卷号：54

期号：8

起止页码：2274

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20152000850981);WOS:【SCI-EXPANDED(收录号:WOS:000350615200002)】；

基金：The authors gratefully acknowledge financial support from the National Natural Science Foundation of China (51472086, 20806024, 51002051), the Natural Science Foundation of Shanghai City (12ZR1407200), and the program of Shanghai Subject Chief Scientist (B type, 13XD1424900).

语种：英文

外文关键词：Catalyst poisoning - Gas adsorption - Honeycomb structures - X ray photoelectron spectroscopy - Activated carbon - Catalyst activity - Catalyst supports - Salts - Cerium oxide - Temperature - X ray diffraction - Selective catalytic reduction

摘要：The influence mechanisms of SO2 on selective catalytic reduction (SCR) of NO over activated carbon honeycomb supported MnOx (Mn/ACH) and CeO2-MnOx (CeMn/ACH) catalysts were investigated at low temperature. The catalysts under different conditions were characterized by transient response experiment, nitrogen adsorption, X-ray diffraction, and X-ray photoelectron spectroscopy techniques. Results indicate that SO2 deactivates the SCR activities of Mn/ACH and CeMn/ACH catalysts at 160 degrees C. The deactivation is mainly due to the deposition of ammonium sulfite and ammonium sulfate on the catalysts surfaces during the NO removal process in the presence of SO2. Compared with Mn/ACH, CeMn/ACH catalyst exhibits a higher resistance to SO2 poisoning, because the addition of CeO2 inhibits the formation of ammonium salts. These ammonium salts decrease SCR activities through pore blocking; however, they can be completely removed by thermal regeneration at 350 degrees C. Furthermore, the competitive adsorption between SO2 and NH3 also decreases SCR activities.