氯化锶吸附脱附特性及应用于固态SCR系统研究  

Research on Adsorption and Desorption Characteristics of Strontium Chlorideand Application in Solid SCR System

作　　者：陈顺 彭雪松 管斌[1] 林赫[1] 湛日景 Chen Shun;Peng Xuesong;Guan Bin;Lin He;Zhan Rijing(Key Laboratory for Power Machinery&Engineering of Ministry of Education,Shanghai Jiao Tong University,Shanghai 200240)

机构地区：[1]上海交通大学动力机械与工程教育部重点实验室,上海200240

出　　处：《柴油机》2021年第3期43-49,共7页Diesel Engine

摘　　要：固态SCR系统技术可以有效地解决储氨密度低,低温环境尿素水溶液启喷时间长及低排温时NO_(x)去除效率低等问题。通过自主搭建的固态SCR系统,对储氨材料Sr(NH_(3))_(8)CI_(2)的氨气吸附和脱附特性进行了研究,并通过TGA、BET、SEM等表征方法分析了SrCI2氨气吸附量衰减的原因。分析表明:吸附结块是导致吸附衰减现象发生的主要原因。制备了SrCI_(2)/活性炭复合吸附剂,通过改善吸附剂的孔隙结构来改善吸附衰减现象。试验结果表明:应用Sr(NH_(3))_(8)CI_(2)/活性炭的固态SCR系统,在180℃的低排温段仍具有81%的NO_(x)去除效率,且氨气启喷时间最短为40 s,性能优于传统Adblue-SCR系统。Solid SCR technology can effectively solve the problems of low ammonia storage density,long start-up time of urea solution and low NO_(x)removal efficiency at low temperature.The ammonia adsorption and desorption characteristics of ammonia storage material Sr(NH_(3))_(8)CI_(2)were studied by self-built solid SCR system,and the causes of ammonia adsorption attenuation of SrCI_(2)were analyzed by means of TGA,BET,SEM and other characterization methods.The results show that the main reason of adsorption attenuation is adsorption agglomeration.SrCISrCI_(2)/activated carbon composite adsorbent was prepared,and the adsorption attenuation phenomenon was improved by improving the pore structure of adsorbent.The experimental results show that the solid SCR system with Sr(NH_(3))_(8)CI_(2)/activated carbon still has 81%NO_(x)removal efficiency at low temperature of 180℃,and the shortest ammonia injection time is 40 s,which is better than the traditional AdBlue-SCR system.

关 键 词：排气后处理 固态SCR 复合吸附剂 SrCl_(2) 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]