摘要
催化剂技术是治理汽车排气污染的重要措施之一 ,作为催化剂组分的稀土在其中起了重要的作用。本文讨论了稀土在汽车排气催化净化中的应用。其作用在于 :提高了载体性能 ,储氧功能 ,提高催化剂的抗中毒性 ,提高催化剂热稳定性 ,作为助剂 ,应用在氧传感器中等。
Catalytic technique has been widely used in purification of automotive exhaust gases,and catalytic converters are main devices for control of automotive emission.This paper reviews the function of rare earth in catalytic purification of automotive exhaust gases.The functions of rare earth are as follows:stablizing surface area of the alumina washcoat,acting as a promotor,acting as an oxygen storage component,improving poison tolerance of the catalyst,stabilizing the catalyst,promoting water gas shift reaction,and finding use in oxygen sensor.
出处
《工业催化》
CAS
2000年第5期3-7,共5页
Industrial Catalysis
关键词
稀土
钙钛矿
汽车排气
催化净化
催化剂
rare earth
perovskite
automotive exhaust gas
catalytic converter
