减少车用天然气发动机尾气中NO_x含量的方法

METHOD FOR REDUCING NO_x CONTENT IN TAIL GAS OF NGV ENGINE

由于大中城市的汽车数量多、密度大，汽车尾气污染造成的危害十分严重。因此，研究并改善车用发动机的污染排放已成了密切关注的课题，也是汽车工业持续发展的重要途径。介绍了天然气发动机的尾气排放、危害以及处理有害排放的措施，并重点介绍了降低发动机气中ＮＯｘ 含量的ＳＮＣＲ 法、ＳＣＲ 法、ＮＳＣＲ 法、ＮＳＲ 法、ＳＮＲ法。

The harm caused by vehicle tail gas pollution is very serious due to great quantity and density of the vehicles in big and medium cities.Therefore,improving the emission of the pollutant from vehicle engine became a problem which a close attention is paid to and is an important way to continuously develop atuomobile vehicle industry.In this paper,the exhaust gas emission and its harm and the measures for desposing pollutant emission are introduced,and the SNCR,SCR,NSCR,NSR and SNR methods for reducing the NO x content in engine′s exhaust gas are emphatically introduced.