Pore plugging effects on the performance of ZSM-5 catalyst in MTP reaction using a discrete model

doi:10.1016/j.cjche.2020.10.038

中国化学工程学报 ›› 2021, Vol. 32 ›› Issue (4): 253-263.DOI: 10.1016/j.cjche.2020.10.038

• Process Systems Engineering and Process Safety • 上一篇下一篇

Pore plugging effects on the performance of ZSM-5 catalyst in MTP reaction using a discrete model

Yudong Shen¹, Hao Liang¹, Zuwei Liao², Binbo Jiang¹, Jingdai Wang², Yongrong Yang², Minggang Li³, Yibin Luo³, Xingtian Shu³

1 Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China;
2 State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China;
3 SINOPEC Research Institute of Petroleum Processing, Beijing 100083, China

收稿日期:2020-02-27 修回日期:2020-07-02 出版日期:2021-04-28 发布日期:2021-06-19
通讯作者: Zuwei Liao
基金资助:
The financial support provided by the Project of National Natural Science Foundation of China (21822809 & 21978256), the National Science Fund for Distinguished Young (21525627), and the Fundamental Research Funds for the Central Universities(2019XZZX004-03), and Ningxia Collaborative Innovation Center for Value Upgrading of Coal-based Synthetic Resin (2017DC57) are gratefully acknowledged. Dr. Zuwei Liao express their dedication to Prof. Xingtian Shu on the occasion of his 80th birthday.

Pore plugging effects on the performance of ZSM-5 catalyst in MTP reaction using a discrete model

Yudong Shen¹, Hao Liang¹, Zuwei Liao², Binbo Jiang¹, Jingdai Wang², Yongrong Yang², Minggang Li³, Yibin Luo³, Xingtian Shu³

1 Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China;
2 State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China;
3 SINOPEC Research Institute of Petroleum Processing, Beijing 100083, China

Received:2020-02-27 Revised:2020-07-02 Online:2021-04-28 Published:2021-06-19
Contact: Zuwei Liao
Supported by:
The financial support provided by the Project of National Natural Science Foundation of China (21822809 & 21978256), the National Science Fund for Distinguished Young (21525627), and the Fundamental Research Funds for the Central Universities(2019XZZX004-03), and Ningxia Collaborative Innovation Center for Value Upgrading of Coal-based Synthetic Resin (2017DC57) are gratefully acknowledged. Dr. Zuwei Liao express their dedication to Prof. Xingtian Shu on the occasion of his 80th birthday.

摘要/Abstract

摘要： Coke is an important medium for connecting reaction and regeneration of the methanol to propylene process on the ZSM-5 catalyst. Coke grows in the meso and macro pores, it gradually worsens the diffusion inside the catalyst particle. Furthermore, pore plugging is inevitable which causes the deactivation of ZSM-5 catalyst. However, current continuum model cannot reflect the changes in pore structure with clear physical concepts. A discrete model that is verified by the carbon deposition experiments is introduced to indicate the behavior of pore plugging effects. Results show that the pore plugging has a significant effect on the performance of the catalyst. The time varying profile of effectiveness factor is obtained, indicating a regular reduction with the increase of the pore plugging effect. Spatial distributions of pore size that would significantly enhance the plugging effect are also identified.

关键词: Discrete model, Pore plugging effects, MTP reaction, Pore network

Abstract: Coke is an important medium for connecting reaction and regeneration of the methanol to propylene process on the ZSM-5 catalyst. Coke grows in the meso and macro pores, it gradually worsens the diffusion inside the catalyst particle. Furthermore, pore plugging is inevitable which causes the deactivation of ZSM-5 catalyst. However, current continuum model cannot reflect the changes in pore structure with clear physical concepts. A discrete model that is verified by the carbon deposition experiments is introduced to indicate the behavior of pore plugging effects. Results show that the pore plugging has a significant effect on the performance of the catalyst. The time varying profile of effectiveness factor is obtained, indicating a regular reduction with the increase of the pore plugging effect. Spatial distributions of pore size that would significantly enhance the plugging effect are also identified.

Key words: Discrete model, Pore plugging effects, MTP reaction, Pore network

Yudong Shen, Hao Liang, Zuwei Liao, Binbo Jiang, Jingdai Wang, Yongrong Yang, Minggang Li, Yibin Luo, Xingtian Shu. Pore plugging effects on the performance of ZSM-5 catalyst in MTP reaction using a discrete model[J]. 中国化学工程学报, 2021, 32(4): 253-263.

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Pore plugging effects on the performance of ZSM-5 catalyst in MTP reaction using a discrete model

Pore plugging effects on the performance of ZSM-5 catalyst in MTP reaction using a discrete model

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