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 wouldnt 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℃.
出处
《内燃机工程》
EI
CAS
CSCD
北大核心
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)
关键词
内燃机
柴油机
氮氧化物
尿素SCR
固体SCR
钒基催化剂
IC engine
diesel engine
NOx
urea selective catalytic reduction
solid selective catalytic reduction
vanadium-based catalyst
作者简介
李加强（1977-），男，博士生，主要研究方向为柴油机污染物排放控制，E-mail：li．jiaqiang@yahoo．com；
葛蕴珊（联系人），男，教授，博士生导师，主要研究方向为内燃机排放控制技术，E-mail：geyunshan@bit．edu．cn。
