Experimental Study of Cu&Fe Molecular Sieve Catalyst for Urea-SCR After-Treatment System

Abstract:

Experimental study on the catalytic activity of Cu&Fe molecular sieve catalyst with different N_SR on NOx conversion efficiency, and explore the influence of temperature and airspeed to ammonia storage characteristics, analysis the relationship between the ammonia storage amount and the NOx conversion efficiency. The experimental result shows that: The catalytic activity can be more than 90% when the catalyst at 300°C-400°C, and an appropriate increase in N_SR can improve the NOx conversion efficiency. The influence of temperature on the characteristics of the reservoir ammonia greater than the airspeed, At 200°C-250°C, the NOx conversion efficiency and the amount of ammonia storage linear relationship. Use dynamic variable gain feedback control SCR system urea injection system, which effectively control the ammonia leak to make it satisfy China-V emission regulations.

• Periodical: Advanced Materials Research (Volumes 805-806)
• Pages: 1843-1846
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.805-806.1843
• Online since: September 2013
• Authors: Xiang Feng Chu, Ling Shan Chen, Jian Wei Zhou, Lu Xu
• Keywords: Ammonia Storage, IC Engine, NOx Conversion Efficiency, Selective Catalytic Restore (SCR), Urea Injection

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