Promotion effect of H2 pretreatment on CeO2 catalyst for NH3-SCR reaction

作     者：Hongbing Lv Xiaoyu Hua Weiyang Xie Qing Hu Jianbo Wu Ruitang Guo 

作者机构：Zhejiang Energy GroupHangzhou 310007China Zhejiang Energy Group R&DHangzhou 311121China School of Energy Source and Mechanical EngineeringShanghai University of Electric PowerShanghai 200090China 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2018年第36卷第7期

页      面：708-714页

核心收录：

学科分类：0832[工学-食品科学与工程（可授工学、农学学位）] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 083203[工学-农产品加工及贮藏工程] 

基　　金：supported by National Natural Science Foundation of China(21546014) the National Natural Science Foundation of Shanghai,China(14ZR1417800) 

主　　题：CeO2 catalyst SCR H2 pretreatment In situ DRIFT Mechanism Rare earths 

摘      要：In this study, the promotion effect of H2 pretreatment on the SCR performance of CeO2 catalyst was investigated based on the characterization results of XRD, H2-TPR, Raman and in situ DRIFT *** crystallinity, higher reducibility and surface acidity can be found on CeO2-H catalyst. The results of DRIFT study reveal that the pretreatment of CeO2 catalyst with H2 can facilitate the adsorption of NH3 and NOx species, while the adsorbed NOx is basically inactive in the NH3-SCR reaction. Moreover, the reaction mechanism of the NH3-SCR reaction over CeO2 catalyst is not changed by H2 pretreatment,which is mainly under the control of Eley-Rideal（E-R） mechanism, The enhanced SCR performance of CeO2-H catalyst is mainly due to the promoted NH3 adsorption and the subsequent facilitation of SCR reaction through E-R pathway.