中文摘要：

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。

英文摘要：

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℃.