稀燃汽车尾气中氮氧化物的催化消除技术  

Technology for the Catalytic Removal of Nitrogen Oxides in the Lean-Burn Exhaust of Vehicles

作　　者：潘广宏[1] 孟明[1] 

机构地区：[1]天津大学化工学院天津市应用催化科学与工程重点实验室,天津300072

出　　处：《化学工业与工程》2011年第3期67-73,共7页Chemical Industry and Engineering

摘　　要：稀薄燃烧(简称稀燃)技术能够使燃料在发动机内充分燃烧,既提高了燃油的经济性,同时又减少了温室气体CO2的排放,因而是一项节能减排的重要技术。但在稀燃条件下氧气大量过剩,加剧了三效催化剂对还原剂的催化氧化,降低了还原剂对NOx催化还原的效率。目前,国际上对稀燃气氛下NOx的消除主要采用NO直接分解、选择性催化还原(SCR)和NOx储存还原(NSR)等催化技术。本文对稀燃NOx催化消除技术进行了评述与展望。Lean-burn technology can not only improve fuel economic efficiency but also reduce CO2 emission.However,in lean-burn exhaust,there exists excess oxygen,which accelerates the catalytic oxidation of reductants,and therefore decreasing efficiency of NOx reduction over the conventional three-way catalysts.At present,there are mainly three kinds of catalytic technology for lean-burn NOx removal,namely NO direct decomposition,selective catalytic reduction（SCR） and NOx storage and reduction（NSR）.In this paper,the lean-burn combustion technique is briefly introduced,and the catalytic technology for lean-burn NOx removal is systematically reviewed.

关 键 词：稀燃技术 NO直接分解 选择性催化还原 NOx储存还原 

分 类 号：TQ032[化学工程]