Experimental Study of Urea Depositions in Urea-SCR System

Shu Zhan Bai; Shuai Guo Lang; Ke Ping Yuan; Yang Liu; Guo Xiang Li

doi:10.4028/www.scientific.net/AMR.937.74

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 937Experimental Study of Urea Depositions in Urea-SCR...

Experimental Study of Urea Depositions in Urea-SCR System

Abstract:

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.

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Periodical:

Advanced Materials Research (Volume 937)

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74-79

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.937.74

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Online since:

May 2014

Authors:

Shu Zhan Bai, Shuai Guo Lang, Ke Ping Yuan, Yang Liu, Guo Xiang Li*

Keywords:

Structural Optimization, Urea Depositions, Urea-SCR System

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