Conversion Performance Prediction of Thermal-Deteriorated Three-Way Catalysts: Surface Reaction Model Development Considering Platinum Group Metals and Co-Catalyst
- 提供方法
- 版元よりダウンロードリンクを連絡
- 形態
- 価格
- 一般価格(税込)：￥6,600 会員価格(税込)：￥5,280
- 文献・情報種別
- SAE Paper
No.2021-24-0077
- 掲載ページ
- 1-14(Total 14 p)
- 発行年月
- 2021年 9月
- 出版社
- SAE International
- 言語
- 英語
- イベント
- International Conference on Engines and Vehicles 2021
書誌事項
| 著者（英） | 1) Yukihiro Yamakawa, 2) Ryoya Inoue, 3) Yunosuke Kubo, 4) Kyohei Yamaguchi, 5) Jin Kusaka |
|---|---|
| 勤務先（英） | 1) Waseda University, 2) Waseda University, 3) Waseda University, 4) Waseda University, 5) Waseda University |
| 抄録（英） | Three-way catalyst (TWC) converters can purify harmful substances, such as carbon monoxide, nitrogen oxides, and hydrocarbons, from the exhaust gases of gasoline engines. However, large amounts of these substances may be emitted before the TWC reaches its light-off temperature during cold starts, and its performance may be impaired by thermal deterioration during high-load driving. In this work, a simulation model was developed using axisuite commercial software by Exothermia S.A to predict the light-off conversion performance of Pd/CeO2-ZrO2-Al2O3 catalysts with different degrees of thermal deterioration. The model considered detailed surface reactions and the main factor of the deterioration mechanism. In the detailed reaction mechanism, adsorption, desorption, and surface reactions of each gas species at active sites of the platinum group metal (PGM) particles were considered based on the Langmuir-Hinshelwood mechanism. Model gas experiments were performed to identify each reaction rate parameter. The PGM particles supported on the co-catalyst CeO2-ZrO2 had two types of active sites with different properties, i.e., sites in the particles' surface region and in a three-phase boundary (TPB) region PGM, CeO2−ZrO2 of the co-catalyst, and gas meet. The TPB active sites were more active than the PGM surface active sites. As the main factor of the catalyst deterioration mechanism, quantitative changes at the two active sites related to PGM sintering were included in the model. After sintering, the occupancy of the TPB active sites on the PGM decreased. The final TWC model was able to accurately predict the light-off conversion performance of a thermal-deteriorated Pd/CeO2-ZrO2-Al2O3 catalyst. 翻訳 |
