CFD simulations of quenching process for partial oxidation of methane: Comparison of jet-in-cross-flow and impinging flow configurations

doi:10.1016/j.cjche.2016.04.039

Chinese Journal of Chemical Engineering ›› 2018, Vol. 26 ›› Issue (5): 903-913.DOI: 10.1016/j.cjche.2016.04.039

• Fluid Dynamics and Transport Phenomena • 上一篇下一篇

CFD simulations of quenching process for partial oxidation of methane: Comparison of jet-in-cross-flow and impinging flow configurations

Xinyu Yu, Tianwen Chen, Qi Zhang, Tiefeng Wang

Beijing Key Laboratory of Green Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

收稿日期:2016-01-07 修回日期:2016-04-03 出版日期:2018-05-28 发布日期:2018-06-29
通讯作者: Tiefeng Wang,E-mail address:wangtf@tsinghua.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China (21276135) and the Project of Chinese Ministry of Education (113004A).

CFD simulations of quenching process for partial oxidation of methane: Comparison of jet-in-cross-flow and impinging flow configurations

Xinyu Yu, Tianwen Chen, Qi Zhang, Tiefeng Wang

Beijing Key Laboratory of Green Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

Received:2016-01-07 Revised:2016-04-03 Online:2018-05-28 Published:2018-06-29
Contact: Tiefeng Wang,E-mail address:wangtf@tsinghua.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China (21276135) and the Project of Chinese Ministry of Education (113004A).

摘要/Abstract

摘要： A new quenching process using the cold pyrolysis gas has been proposed for the partial oxidation (POX) of methane to recover the heat. The mixing of hot product gas and cold pyrolysis gas in milliseconds is critical to this new approach. Two most widely-used rapid mixing configurations, i.e. the jet-in-cross-flow (JICF) and impinging flow configurations, are compared in terms of mixing and quenching performances using computational fluid dynamics (CFD) coupled with detailed reaction mechanism Leeds 1.5. The mixedness, residence time distribution, temperature decreasing rate and loss ratio of acetylene during the quenching are systematically studied. The results show that the impinging flow has a more uniform mixing and narrower residence time distribution than the JICF. However, the temperature decreasing rate of the mainstream is faster in the JICF than in the impinging flow. The loss ratio of acetylene in the quenching process is 2.89% for the JICF and 1.45% for the impinging flow, showing that the impinging flow configuration is better and feasible for the quenching of POX of methane.

关键词: Jet-in-cross-flow, Impinging flow, CFD simulations, Mixing behavior, Quenching of partial oxidation process

Abstract: A new quenching process using the cold pyrolysis gas has been proposed for the partial oxidation (POX) of methane to recover the heat. The mixing of hot product gas and cold pyrolysis gas in milliseconds is critical to this new approach. Two most widely-used rapid mixing configurations, i.e. the jet-in-cross-flow (JICF) and impinging flow configurations, are compared in terms of mixing and quenching performances using computational fluid dynamics (CFD) coupled with detailed reaction mechanism Leeds 1.5. The mixedness, residence time distribution, temperature decreasing rate and loss ratio of acetylene during the quenching are systematically studied. The results show that the impinging flow has a more uniform mixing and narrower residence time distribution than the JICF. However, the temperature decreasing rate of the mainstream is faster in the JICF than in the impinging flow. The loss ratio of acetylene in the quenching process is 2.89% for the JICF and 1.45% for the impinging flow, showing that the impinging flow configuration is better and feasible for the quenching of POX of methane.

Key words: Jet-in-cross-flow, Impinging flow, CFD simulations, Mixing behavior, Quenching of partial oxidation process

Xinyu Yu, Tianwen Chen, Qi Zhang, Tiefeng Wang. CFD simulations of quenching process for partial oxidation of methane: Comparison of jet-in-cross-flow and impinging flow configurations[J]. Chinese Journal of Chemical Engineering, 2018, 26(5): 903-913.

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CFD simulations of quenching process for partial oxidation of methane: Comparison of jet-in-cross-flow and impinging flow configurations

CFD simulations of quenching process for partial oxidation of methane: Comparison of jet-in-cross-flow and impinging flow configurations

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