催化转换器对排放物催化转换的分析

Study on Catalytic Conversion of Emission Conducted by a Catalytic Converter

氧化型催化转换器主要用来催化转换排气成分中的 THC和 CO,其主要工作原理是进一步氧化排气成分中的未完全燃烧的中间产物 ,以降低排气成分中的有害物质。但是 ,其工作的热力学环境将大大影响工作性能和效率。试验在天然气 /柴油双燃料发动机上进行 ,重点分析排放物两次催化转换后的变化。试验结果表明 ,该型催化转换器除对 THC和 CO有催化氧化作用外 ,同时使 NOx 排放量增大。

An oxidation catalytic converter is mainly used for catalytic conversion of unburned THC and CO in the exhaust gas, and its primary principle is to reduce the hazardous materials by farther oxidating of the unburned intermediate reactive products in the exhaust gas. However, the performance and efficiency of this converter will be greatly effected by the thermodynamic environment in which it operates. According to the result in this study, this type catalytic converter causes NO x increase when THC and CO are oxidized.