Sulfur poisoning mechanism of three way catalytic converter and its grey relational analysis
来源期刊：中南大学学报(英文版)2014年第11期
论文作者：CAI Hao(蔡皓) LIU Ya-fei(刘亚飞) GONG Jin-ke(龚金科) E Jia-qiang(鄂加强) GENG Yu-he(耿玉鹤) YU Li-ping(余立平)
文章页码：4091 - 4096
Key words：sulfur poisoning; three-way catalytic converter; reaction mechanism; numerical simulation; grey relational analysis
Abstract: Combining a detailed catalytic surface reaction mechanism with noble metal and promoter elementary reactions, a new three-way catalytic converter (TWC) reaction mechanism is established. Based on the new mechanism, steady condition numerical simulation is carried out, and the change of light-off temperatures and conversion efficiency with various SO2 contents is obtained. By grey relational analysis (GRA), the relational grade between conversion efficiency and SO2 content is obtained. And, the result shows that SO2 content has the most important influence on C3H6 and NOX conversion efficiency. This provides an important reference to the improvement of activity design of TWC, and may provide guidance for the condition design and optimization of TWC.
CAI Hao(蔡皓)1, LIU Ya-fei(刘亚飞)1, GONG Jin-ke(龚金科)1 , E Jia-qiang(鄂加强)1, GENG Yu-he(耿玉鹤)2, YU Li-ping(余立平)1
(1. State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body
(Hunan University), Changsha 410082, China;
2. GAC Mitsubishi Motor Co., Ltd., Changsha 410014, China)
Abstract:Combining a detailed catalytic surface reaction mechanism with noble metal and promoter elementary reactions, a new three-way catalytic converter (TWC) reaction mechanism is established. Based on the new mechanism, steady condition numerical simulation is carried out, and the change of light-off temperatures and conversion efficiency with various SO2 contents is obtained. By grey relational analysis (GRA), the relational grade between conversion efficiency and SO2 content is obtained. And, the result shows that SO2 content has the most important influence on C3H6 and NOX conversion efficiency. This provides an important reference to the improvement of activity design of TWC, and may provide guidance for the condition design and optimization of TWC.
Key words:sulfur poisoning; three-way catalytic converter; reaction mechanism; numerical simulation; grey relational analysis
