摘要
由于小型汽油机大部分为化油器式,空燃比变化范围很大,三元催化器难以满足其使用范围.采用Pt-Rh催化器净化方法,着重探讨了以降低NOx排放为主的Pt-Rh催化器性能、排放温度、NOx还原催化的性能和转化效率控制等问题.研究了Pt-Rh催化器的转化效果、相互影响和作用并提出相应的排放建议.结果表明,在Pt-Rh催化器中,增加贵金属Rh的含量,可有效降低发动机尾气NOx的排放,同时该催化器对NOx、HC和CO的排放也有一定的净化作用.
Because many small petrol engines are carburetor, air-fuel ratio exchanged better in scope and the three-way catalytic converter is difficult for using demand. According to the special performances of small petrol engine, a Pt-Rh catalyst is put forward for NOx conver- sion which used in small petrol engines in this paper, and a series of issues are discussed such as the Pt-Rh catalyst characters, temperature, NOx reduction, performances of conver- sion rate. The initial practice for applying Pt - Rh catalyst is carried out, the function or in- fluence and some suggestion are suggested. The test results show that Pt-Rh catalyst can reduce NOx exhaust emission greatly on the proper condition which is increased noble metal Rh, and cut down the exhaust emission of NOx,HC and CO.
出处
《哈尔滨商业大学学报（自然科学版）》
CAS
2008年第4期409-412,共4页
Journal of Harbin University of Commerce：Natural Sciences Edition
基金
交通部西部建设科技基金项目(2006318800068)
关键词
小型汽油机
排放
催化器
转化效率
small petrol engines
exhaust emission
catalytic converter
conversion rate
