基于固体SCR技术的柴油机NO_x排放特性试验研究  

Experimental Investigation for NO_x Emission Characteristics of Diesel Engine Based on Solid Selective Catalytic Reduction Technology

作　　者：李加强[1,2] 葛蕴珊[1] 何超[2] 谭建伟[1] 李兰[1] 冯向宇[1] 

机构地区：[1]北京理工大学汽车动力性与排放测试国家专业实验室,北京100081 [2]西南林业大学机械与交通学院,昆明650224

出　　处：《内燃机工程》2015年第4期8-13,共6页Chinese Internal Combustion Engine Engineering

基　　金：国家自然科学基金项目(51276021)

摘　　要：在安装有钒基催化剂选择性催化还原(selective catalytic reduction,SCR)系统的柴油机台架上,研究了尿素SCR系统与固体SCR系统的NOx排放特性。试验结果表明:固体SCR系统不会产生尿素结晶现象;中低排气温度下应用固体SCR技术可以改善柴油机NOx排放,低排气温度下尤其明显,平均效率比尿素SCR提高了6%;高排气温度下固体SCR系统与尿素SCR系统的NOx转化效率总体相当。The NOxemission characteristics of the urea selective catalytic reduction（SCR）and solid SCR systems were investigated respectively,through the bench test of a diesel engine equipped with vanadium-based SCR catalyst. The results indicate that solid SCR system wouldnt produce urea crystallization,and can improve the NOxemission from diesel engine at low-medium exhaust temperature.By use of solid SCR technology the average conversion efficiency is increased by 6% compared with that of urea SCR system especially at exhaust temperature below 300℃.Solid SCR system can be comparable in NOx conversion efficiency to urea SCR system when exhaust temperature is above 400℃.

关 键 词：内燃机 柴油机 氮氧化物 尿素SCR 固体SCR 钒基催化剂 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]