某选择性催化转化器的催化特性试验研究  

Experimental Study on Catalytic Performance of A Selective Catalytic Converter

作　　者：郭守峰 贾春富 高涛 白凤月 Guo Shou-feng;Jia Chun-fu;Gao Tao;Bai Feng-yue(CATARC Automotive Test Center(Tianjin)Co.,Ltd.,Tianjin 300300,China)

机构地区：[1]中汽研汽车检验中心(天津)有限公司,天津300300

出　　处：《内燃机与配件》2024年第3期16-18,共3页Internal Combustion Engine & Parts

摘　　要：在AVL测试台架上进行发动机后处理试验,研究了不同选择性催化转化器(Selective Catalystic Reduction, SCR)上游温度、空速(Space Velocity, SV)、氨氮比下SCR的氨存储特性和NOx转化效率。结果表明,随SCR上游温度和空速增加,氨存储能力逐渐下降,175℃、20000h^(-1)空速时,氨存储最高,为2981.68mg/L;NOx转化效率随SCR上游温度增加先升高后降低,随空速的增加而降低,在300℃、20000h^(-1)空速时,该SCR有最高的转化效率,为99%。Engine post-processing test on AVL test bench,the ammonia storage characteristics and NOx conversion efficiency of Selective Catalystic Reduction(SCR)at different upstream temperature,Space Velocity(SV)and ammonia-nitrogen ratio were studied.The results showed that the ammonia storage capacity decreased with the increase of SCR upstream temperature and airspeed,and the ammonia storage capacity was the highest at 175℃and 20000h^(-1) airspeed,which was 2981.68 mg/L,the SCR has the highest conversion efficiency(99%)at 300℃and 20000h^(-1) airspeed.

关 键 词：柴油机 排温 空速 SCR 氨存储 NOx转化效率 

分 类 号：TK411.5[动力工程及工程热物理—动力机械及工程]