| 摘要 |
PURPOSE:To remove nitrogen oxides from the waste combustion gas containing oxygen in practical level by allowing hydrocarbon of a specific ratio to nitrogen oxide in the waste combustion gases to exist in the presence of a catalyst consisting a Co-contained zeolite and bringing the waste combustion gases into contact with the catalyst at a specific temp. of catalyst. CONSTITUTION:Hydrocarbon (e.g. ethylene) of >1.3mol ratio expressed in the term of methane to nitrogen oxides in the waste combustion gas exists in the presence of the catalyst made of the Co-contained zeolite. Furthermore, the temp. of the catalyst is setted to 410-550 deg.C, and the waste combustion gas is brought into contact with the catalyst. As a result, nitrogen oxides particularly nitrogen monoxide is purified from the waste combustion gas containing oxygen in practical level. |
