Research on Issue of NOx Emissions of Diesel Engine

Abstract

Diesel engine shows higher thermal efficiency than gasoline engine. However, with the effect of emission of Nitrogen Oxide (NOx), diesel passenger vehicles are difficult to gain market share. The Volkswagen diesel emissions scandal that occurred in 2015 undoubtedly sent diesel vehicles to the bottom of the market. Just the issue of NOx emissions alone has plunged diesel vehicles into a crisis of trust. It indicates that the public has zero tolerance for NOx emissions. NOx emissions really have lots of harmful effects on human beings and environments. If diesel vehicles try to regain public favor, issue of NOx emissions must be solved. This article focuses on the specific hazards caused by NOx emissions from diesel vehicles. And give a brief introduction of principle of generation of NOx. Reducing the emission of nitrogen oxides is the key to solving the problem. Now, we need some feasible solutions to reduce the content of nitrogen oxides in the exhaust emissions from diesel vehicles. This article will introduce some potentially feasible solution, which were named as Selective Catalytic Reduction (SCR) and Selective Non-Catalytic Reduction (SNCR).