标题：Experimental study of urea depositions in urea-SCR system
作者：Bai, Shu-Zhan ;Lang, Shuai-Guo ;Yuan, Ke-Ping ;Liu, Yang ;Li, Guo-Xiang
作者机构：[Lang, Shuai-Guo ;Yuan, Ke-Ping ;Li, Guo-Xiang ] School of Energy and Power Engineering, Shandong University, Jinan 250061, China;[Bai, Shu-Zhan ;Lang 更多
会议名称：2nd International Conference on Material Science and Environmental Engineering, MSEE 2014
会议日期：21 March 2014 through 23 March 2014
来源：Advanced Materials Research
关键词：Structural optimization; Urea depositions; Urea-SCR system
摘要：Avoiding the urea deposition in the exhaust stream is one of the basic requirements for SCR system normal application. Unreasonable structure design, machining and installation position all could lead to urea crystallization on the wall of exhaust pipe and the front end surface of the catalyst, in addition, unreasonable control strategy also could deteriorate this phenomenon. The components of the urea depositions are the urea and cyanuric acid analyzed by thermogravimetry - FTIR technology. The integrated injector mounting is designed to alleviate the urea crystallization based on analysis results. The engine test and the vehicle road test are all shown that the optimal structural design and calibration strategies could avoid crystallization and sedimentation effectively in the exhaust system. © (2014) Trans Tech Publications, Switzerland.