Effects of different methods of introducing Mo on denitration performance and anti‐SO_(2)poisoning performance of CeO_(2)

作     者：Lulu Li Chengyan Ge Jiawei Ji Wei Tan Xin Wang Xiaoqian Wei Kai Guo Changjin Tang Lin Dong 李露露;葛成艳;季稼伟;谭伟;王鑫;魏小倩;郭凯;汤常金;董林

作者机构：School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210093JiangsuChina Jiangsu Key Laboratory of Vehicle Emissions ControlCenter of Modern AnalysisNanjing UniversityNanjing 210093JiangsuChina School of EnvironmentNanjing UniversityNanjing 210093JiangsuChina School of Environmental and Chemical EngineeringJiangsu University of Science and TechnologyZhenjiang 212003JiangsuChina School of Chemistry&Chemical EngineeringYancheng Institute of TechnologyYancheng 224051JiangsuChina School of EnvironmentNanjing Normal UniversityNanjing 210093JiangsuChina 

基　　金：国家自然科学基金(21806077 21773106 21707066 21607122) 

出 版 物：《Chinese Journal of Catalysis》 (催化学报（英文）)

年 卷 期：2021年第42卷第9期

页      码：1488-1499页

摘      要：Cerium‐based catalysts are very attractive for the catalytic abatement of nitrogen oxides(NOx)emitted from stationary ***,the main challenge is still achieving satisfactory catalytic activity in the low‐temperature range and tolerance to SO2 *** the present work,two series of Mo‐modified CeO_(2)catalysts were respectively obtained through a wet impregnation method(Mo‐CeO_(2))and a co‐precipitation method(MoCe‐cp),and the roles of the Mo species were systematically *** tests showed that the Mo‐CeO_(2)catalyst displayed much higher NO conversion at low temperature and anti‐SO2 ability than MoCe‐*** optimal Mo‐CeO_(2)catalyst displayed over 80%NO elimination efficiency even at 150°C and remarkable SO2 resistance at 250°C(nearly no activity loss after 40 h test).The characterization results indicated that the introduced Mo species were highly dispersed on the Mo‐CeO_(2)catalyst surface,thereby providing more Brønsted acid sites and inhibiting the formation of stable adsorbed NOx *** factors synergistically promote the selective catalytic reduction(SCR)reaction in accordance with the Eley‐Rideal(E‐R)reaction path on the Mo‐CeO_(2)***,the molybdenum surface could protect CeO_(2)from SO2 poisoning;thus,the reducibility of the Mo‐CeO_(2)catalyst declined slightly to an adequate level after *** results in this work indicate that surface modification with Mo species may be a simple method of developing highly efficient cerium‐based SCR catalysts with superior SO2 durability.

主 题 词：Surface modification MoO_(3)‐CeO_(2) NH_(3)‐SCR Brønsted acid sites SO_(2) resistance 

学科分类：083002[083002] 0830[工学-生物工程类] 081705[081705] 08[工学] 0817[工学-轻工类] 

核心收录：

D　O　I：10.1016/S1872-2067(20)63778-0

馆 藏 号：203103174...