Dynamic oxygen storage modeling in a three-way catalyst for natural gas engines: A dual-site and shrinking-core diffusion approach
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- 作者：Jian Gong ; jian.gong@cummins.com ; Di Wang ; Junhui Li ; Neal Currier ; Aleksey Yezerets
- 关键词：Three-way catalyst ; Oxygen storage capacity ; Natural gas engine ; Kinetic modeling ; Shrinking core diffusion
- 刊名：Applied Catalysis B: Environmental
- 出版年：2017
- 出版时间：April 2017
- 年：2017
- 卷：203
- 期：Complete
- 页码：936-945
- 全文大小：1061 K
- 卷排序：203
文摘
A dual-site dynamic OSC model was developed on a TWC catalyst. A shrinking core diffusion approach was applied to model diffusion controlled OSC. WGS reaction and CH4 SR reaction play significant roles in the amount of OSC. Reducibility on OSC decreases in the order of H2 > CO > CH4 at 250 °C < T < 450 °C. The model exhibits good predictions of dynamic OSC.