选择性催化还原过滤器研究进展

Research Progress of Selective Catalytic Reduction Filter

选择性催化还原过滤器(Selective Catalytic Reduction Filter,SCRF)是具有很大发展潜力的发动机污染物处理手段,作为兼具SCR和DPF两部分功能的后处理装置,能够帮助减小后处理装置体积和费用,或者在不缩减体积的情况下获得更好的污染物处理效果。但SCRF内部多种组分构成的复杂的反应体系和较宽的工作温度窗口导致对系统污染物处理效果的预测难度提高很多。全面梳理了近年来SCRF在以下两个方面的研究成果:一是影响DeNO_(x)效率和被动再生效率的表观因素,一是SCRF微观化学反应与传质机制,有利于研究者开展微观机理和SCRF配套优化研究。

Selective Catalytic Reduction Filter(SCRF)is a promising engine pollutant treatment method.As a post-treatment device with both SCR and DPF functions,it can help reduce the volume and cost of the post-treatment device,or obtain better pollutant treatment effect without reducing the volume.However,the complex reaction system composed of various components in SCRF and the wide operating temperature window make it much more difficult to predict the pollutant treatment effect of system.The research results of SCRF in the following two aspects in recent years were hence comprehensively reviewed.One was the apparent factors affecting DeNO_(x) efficiency and passive regeneration efficiency,and the other was the microscopic chemical reaction and mass transfer mechanism of SCRF,which was beneficial for researchers to conduct microscopic mechanism and SCRF matching optimization research.