Investigation on the Simulation of Control Strategy for a SCR System

Abstract:

In this paper, the model of SCR after-treatment system is established by the software MATLAB and the control strategy for the system is studied also. Based on Eley-rideal mechanism, four major chemical reactions including the adsorption of ammonia, desorption of ammonia, selective catalytic reduction and oxidation of adsorbed ammonia are selected to study the SCR control strategy. Based on the energy conservation law, the equation calculating the temperature of the layered model is derived. Combined with the equations of chemical reaction process, a mathematical model of SCR catalytic converter is established. To achieve a high NO_X reduction efficiency of SCR system, the reasonable and efficacious control strategies for the micro-element models of SCR catalytic is simulated, which including the feedback control strategy based on the feed-forward controller and the PID control strategy.

• Periodical: Advanced Materials Research (Volumes 860-863)
• Pages: 770-773
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.860-863.770
• Online since: December 2013
• Authors: You Hong Xiao*, Wei Zheng, Yu Shan Jin, Xin Na Tian
• Keywords: Control Strategy, Nitrogen Oxides, SCR Model

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