A catalyst useful for the selective catalytic reduction process to reduce selectively a gas mixture, and article for treating a gas containing nitrogen oxides

摘要

1 / 1 Summary u00e2u20acu0153catalisador u00e3u0161til to reduu00e3u2021u00e3u0192o catalu00e3ufffdtica selective process for selectively reducing a gas mixture, and article for treating a gu00e3ufffds containing Ti "xidos of nitrogu00e3u0161niou00e2u20acufffd su00e3u00a3o described catalysts and articles used for reduu00e3u00a7u00e3u00a3o catalu00e3u00adtica Selective (SCR). The catalyst comprises a u00e3u00b3xido of cu00e3rio and molecular sieve octau00e3drica (who) comprising u00e3u00b3xido of manganu00e3u00aas.Catalysts, which comprise 0.1 to 50% by weight of cu00e3rio, may be prepared by doping, exchange iu00e3u00b4nica, deposiu00e3u00a7u00e3u00a3o or other tu00e3cnicas. Tambu00e3m described i n a process of SCR in which a gas mixture comprising u00e3u00b3xidos of nitrogu00e3u00aanio o selectively reduced in presenu00e3u00a7a a reducer and the catalyst modified with cu00e3rio who.The catalysts who u00e3u00b3xido of manganu00e3u00aas modified with cu00e3rio often offer advantages for reduu00e3u00a7u00e3u00a3o unexpected catalu00e3u00adtica selective, especially NH, SCR, 3 including better stability tu00e3rmica and better activity for conversu00e3u00a3o NOx, especially in temperatures. Relatively low (100u00e2u00b0c the 250u00e2u00b0c).