REMOVING METHOD OF NOX IN AUTOMOBILE EXHAUST GAS AND REMOVING CATALYST FOR NOX

摘要

PURPOSE:To efficiently decomposing and removing NOX in an automobile exhaust gas with a inexpensive base material by arranging a prescribed quantity of CaO.FeXO based multiple oxide having a specific component composition in an engine exhaust gas pipe reaching a prescribed temp. range at the time of driving automobile. CONSTITUTION:The CAO.FeXO based multiple oxide containing 10-30wt.% CaO and <=9wt.% component other than CaO and iron oxide is used, and >=0.32kg CaO.FeXO based multiple oxide per 1m<3>/min discharge gas is arranged in the exhaust gas pipe of automobile engine reaching 300-700 deg.C in temp.