A novel mechanism for poisoning of metal oxide SCR catalysts: base–acid explanation correlated with redox properties

• Published in: Chemical communications (Cambridge, England) Vol. 50; no. 70; pp. 10031 - 10034
• Main Authors: Chang, Huazhen, Li, Junhua, Su, Wenkang, Shao, Yuankai, Hao, Jiming
• Format: Journal Article
• Language: English
• Published: England 11.09.2014
• Subjects: Basicity; Catalysis; Catalysts; chemical reactions; Correlation; Formations; gases; hydrochloric acid; Metal oxides; nitrous oxide; Nitrous oxides; Poisoning; sulfur dioxide; temperature

A novel mechanism is proposed for the poisoning effect of acid gases and N 2 O formation on SCR catalysts involving base–acid properties correlated with redox ability of M–O or M–OH (M = Ce or V) of metal oxides and the strength of their basicity responsible for resistance to HCl and SO 2 at medium...