Rare earth containing catalysts for selective catalytic reduction of NOx with ammonia： A Review

• Published in: Journal of rare earths 2014-10, Vol.32 (10), p.907-917
• Main Author: 陈磊 司知蠢 吴晓东 翁端 冉锐 於俊
• Format: Article
• Language: English
• Subjects: ceria; deactivation; deNOx; NH3-SCR; rare earths; transition metal oxide; 催化活性; 含稀土; 展望; 最佳性能; 氨; 氮氧化物; 选择性催化还原; 钒催化剂
• ISSN: 1002-0721; 2509-4963
• DOI: 10.1016/S1002-0721(14)60162-9

Increasingly stringent regulations in many countries require effective reduction and control of NOx emissions. To meet these limits, various methods have been exploited, among which the selective catalytic reduction of NOx using ammonia as the reduc- rant （NH3-SCR） is the most favored technology. High catalytic activity, N2 selectivity and resistance to deactivation by sulfur, alkaline metals and hydrothermal conditions are the optimal properties of a successful SCR catalyst. Rare earth oxides, particularly CeO2, have been increasingly used to improve the catalytic activity and resistance to deactivation of deNOx catalysts, both modifying tradi- tional vanadium catalysts, and also developing novel catalysts, especially for low temperature applications. This review summarized the open literature concerning recent research and development progresses in the application of rare earths for NH3-SCR of NOx. Additionally, the roles of rare earths in enhancing the performance of NH3-SCR catalyst were reviewed.