摘要：n the circumstances that vehicle pollutants emission issues are highlighted all over the world, exhaust after-treatment (EAT) technologies of diesel engines, are critical to achieve effective clarification. This paper focused on the recent development of die- sel engine denitration (De-NOx) after-treatment technologies, whilst an overview of the current state and challenges is presented. Ammonia and selectivecatalytic reduction (SCR) is the most common solu-tion of diesel engine De-NOx for road vehicles. To achieve effective and efficient De-NOx with NH3- SCR, catalysts needs to operate within a wide tem- perature window while strongly resistant to sulfur di- oxide (SO2) poisoning and hydrothermal aging, the advanced control strategies of urea injection and uni- formity index (UI) of NH; also requires optimization. Lean NOx trap (LNT) technology is another De- NOx route, yet sulfur poisoning and thermal aging hindered application. To achieve complete clarifica- tion, the influence of integration schemes on De- NOx efficiency also requires consideration, and sys- tem management will be a research highlight in the near future.
关键词：Diesel engine;NH3-SCR;After-treatment system integra-
tion;Lean NOx trap;Environmental requirements
