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OALib Journal期刊
ISSN: 2333-9721
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柴油尾气doc催化剂pt-pd/ceo2的活性和抗硫性
, PP. 1401-1408
Keywords: doc催化剂,pt-pd协同,柴油尾气,抗硫性
Abstract:
？采用浸渍法制备了不同pt、pd比例的pt-pd/ceo2催化剂,考察了其催化氧化模拟柴油车尾气的活性,并测试了抗硫性。活性测试结果表明,pt、pd协同降低了催化剂的起燃温度,其比例对催化剂性能影响很大,其中,pt0.2pd0.8/ceo2催化剂在模拟柴油车尾气(丙烯(c3h6)、一氧化碳(co)和一氧化氮(no))中的催化活性最高;c3h6的t50降到170℃,co的t50降到了150℃,显示了良好的pt、pd协同效应;h2-tpr表征和抗硫性结果分析表明,高比例pt/pd催化剂具有更多的表面活性氧,其相对数值与催化剂抗硫性能的关联度高,在催化剂硫酸盐中毒的条件下,更有利于催化反应的进行。
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