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Co、Ni掺入对Pd-Rh型催化剂三效净化C_3H_8、CO、NO的影响
doi: 10.13205/j.hjgc.201502013
PROMOTIONAL EFFECTS OF Co，Ni INCORPORATION ON CATALYTIC PERFORMANCE OF Pd-Rh BASED ON THREE-WAY CATALYSTS FOR SIMULTANEOUSLY REMOVING C3H8 ，CO AND NO
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摘要: 以堇青石质陶瓷蜂窝为第一载体,活性氧化铝和铈锆复合氧化物固溶体涂层为第二载体,采用等体积浸渍法制备系列低Pd-Rh含量的三效催化剂及Co、Ni单或双掺入样品。主要研究了Co、Ni掺入对Pd-Rh型催化剂三效净化C3H8、CO、NO活性的影响,结果表明:同时掺入Co、Ni催化剂的三效净化效果优于单独掺入Co或Ni的三效净化效果,同时掺入Co、Ni时,掺入1%Co3O4和2%Ni O的催化剂净化效果最佳;350℃时,催化脱除C3H8、CO的效率分别为100%、97%,400℃时,催化脱除NO的效率为99%。Abstract: Series of low amount of Pd-Rh based on three-way catalysts，the ones single incorporated with Co or Ni，and the ones double incorporated with Co and Ni，using cordierite honeycomb ceramics as the first carrier and coating containing activated alumina and ceria-zirconia solid solution as the second carrier，were prepared by incipient impregnation method． The effects of Co or Ni single incorporation and double incorporation on catalytic activities of Pd-Rh based on catalysts for simultaneously removing C3H8 ，CO and NO were studied． The results showed that the catalysts incorporated with Co and Ni had higher catalytic activity than that incorporated with Co or Ni． For double incorporation of Co and Ni，the catalyst added with 1% Co3O4 and 2% NiO exhibited the best catalytic activities，the removal rates of C3H8 and CO at 350 ℃ were 100% and 97%，and the removal rate of NO at 400 ℃ was 99%．
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