摘要
研究了３种低钯含稀土复合型汽车排气净化催化剂的制备工艺条件、活性和热稳定性。结果表明：所研制的催化剂对ＣＯ、ＨＣ的起燃温度分别在１８２℃～２１０℃之间；完全氧化温度在２３０℃～２５０℃之间。具有起燃温度低、活性高的特性。高温处理后，Ｔ５０％和Ｔ１００％仅上升了８℃～２４℃，说明热稳定性良好。
The preparation technology and the catalytic activity and thermal stability of three different kinds of catalysts were studied.The research has revealed that these catalysts have low light\|off temperatures,good catalytic activities and thermal stabilities.The light\|of temperatures of CO and HC are 182210 and 210230 and the complete oxide temperatures of them are 230250 and 240280.The light\|off temperatures and the complete oxide temperatures only rose from 8 to 24 after being treated at high temperatures.The preparation technology of impregnating Pd and the other metals separately and using adhesive in an alumina coating can improve the catalytic activity and thermal stability of the catalysts.
出处
《环境工程》
CAS
CSCD
北大核心
1999年第2期25-27,共3页
Environmental Engineering
基金
国家教委自然科学基金
关键词
汽车排气
催化剂
稀土催化性能
制备工艺
automobile exhaust, catalyst, palladium, catalytic performance of rare earth metals and preparation technology
