首页>
外国专利>
Method for operating a purification device for gases as well as a purification device for gases
Method for operating a purification device for gases as well as a purification device for gases
展开▼
机译:用于操作气体净化设备的方法以及用于气体净化设备
展开▼
页面导航
摘要
著录项
相似文献
摘要
The present invention relates to a method for operating a catalyst for gases, especially for exhaust gases of stoichiometrically operated gasoline engines, wherein a catalyst is exposed to a gas stream and pollutants are catalytically converted. To improve the elimination of pollutants in the starting phase, hydrocarbons present in the gas are temporarily stored by the catalyst at temperatures below a response temperature of the catalyst, particularly below 200 C., and preferably below 150 C. The hydrocarbons are then released at temperatures above the response temperature and the pollutants, such as nitrogen oxides, are catalytically converted with reducing agents, such as hydrocarbons, carbon monoxide and mixtures thereof. The catalyst is a spinel, such as (MgCu)Al.sub.2 O.sub.4, which may also include a catalytically active species, such as WO.sub.3, V.sub.2 O.sub.5 and TiO. sub.2.
展开▼
机译:用于操作催化剂的方法技术领域本发明涉及一种用于操作催化剂的方法,所述催化剂用于气体,特别是用于化学计量操作的汽油发动机的废气,其中催化剂暴露于气流中并且污染物被催化转化。为了改善起始阶段中污染物的消除,气体中存在的烃在低于催化剂的响应温度,特别是低于200℃,优选低于150℃的温度下被催化剂暂时存储。在高于响应温度的温度下,污染物(例如氮氧化物)被还原剂(例如碳氢化合物,一氧化碳及其混合物)催化转化。催化剂是尖晶石,例如(MgCu)Al 2 O 4,其还可以包括催化活性物质,例如WO 3,V 2 O 5和H 2O。二氧化钛分2。
展开▼