摘要
选择了不同类型的SCR和DOC进行发动机台架测试和评价,研究了温度、空速(SV)等对NOx、CO和碳氢化物转化效率的影响。结果表明,温度和空速对NOx转化效率均有明显的影响。在200℃-300℃,NOx的转化效率随着温度的增加而增加,SV=40000 h^-1的NOx的转化效率高于SV=60000 h^-1,并且Fe基催化剂比Cu基催化剂有更好的低温活化性能;在300℃-400℃,NOx的转化效率稳定在99%左右,几乎不受温度、空速和负载金属的影响。不同类型的DOC对CO转化率都在80%以上,其NO转化率在350℃达到峰值。其中2#催化器中的DOC段长度为4 inch,铂钯比为3:1,在测试温度范围内HC和NOx转化效率最高。
Different types of SCR and DOC are selected to test and evaluate the engine bench.The effects of temperature and space velocity(SV)on the conversion efficiency of NOx,CO and hydrocarbons are studied.The results show that temperature and space velocity have obvious effects on the conversion efficiency of NOx.The conversion efficiency of NOx increases with the increase of temperature within 200℃-300℃.The conversion efficiency of NOx with SV=40000 h^-1 is higher than that with SV=60000 h^-1,and the Fe-based catalyst has better low-temperature activation performance than that with Cu-based catalyst;at 300℃-400℃,the conversion efficiency of NOx increases with the increase of temperature.It is stable at about 99%,almost unaffected by temperature,airspeed and load metal.The CO conversion rate of different types of DOC is more than 80%,and the NO conversion rates reach their peak values at 350℃.The length of DOC section in 2#catalyst is 4 inches,and the ratio of PT to PD is 3:1.The conversion efficiency of HC and NOx is the highest in the test temperature range.
作者
王辉
周硕
付威
刘来君
WANG Hui;ZHOU Shuo;FU Wei;LIU Laijun(Engineering Research Institute,Guangxi Yuchai Machinery Co,Ltd,Nanning 530000,Guangxi,China;School of Materials Science and Engineering,Guilin University of Technology,Guilin 541500,Guangxi,China)
出处
《中国陶瓷工业》
CAS
2020年第3期6-11,共6页
China Ceramic Industry
基金
国家自然科学基金资助项目(11564010)
广西创新驱动重大专项金资助项目(AA18118010)。
关键词
转化效率
选择性催化还原
DOC
conversion efficiency
selective catalytic reduction
DOC
