Modeling and analysis of air combustion and steam regeneration in methanol to olefins processes

doi:10.1016/j.cjche.2023.09.007

中国化学工程学报 ›› 2024, Vol. 66 ›› Issue (2): 94-103.DOI: 10.1016/j.cjche.2023.09.007

• Full Length Article • 上一篇下一篇

Modeling and analysis of air combustion and steam regeneration in methanol to olefins processes

Jinqiang Liang^1,2, Danzhu Liu^2,3, Shuliang Xu², Mao Ye^1,2

1. Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China;
2. National Engineering Research Center of Lower-Carbon Catalysis Technology, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116021, China;
3. University of Chinese Academy of Sciences, Beijing 100049, China

收稿日期:2023-04-13 修回日期:2023-09-19 出版日期:2024-02-28 发布日期:2024-04-20
通讯作者: Shuliang Xu,E-mail:shlxu@dicp.ac.cn;Mao Ye,E-mail:maoye@dicp.ac.cn
基金资助:
The authors gratefully acknowledge the financial support from the Strategic Priority Research Program of Chinese Academy of Sciences (XDA21010100).

Modeling and analysis of air combustion and steam regeneration in methanol to olefins processes

Jinqiang Liang^1,2, Danzhu Liu^2,3, Shuliang Xu², Mao Ye^1,2

1. Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China;
2. National Engineering Research Center of Lower-Carbon Catalysis Technology, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116021, China;
3. University of Chinese Academy of Sciences, Beijing 100049, China

Received:2023-04-13 Revised:2023-09-19 Online:2024-02-28 Published:2024-04-20
Contact: Shuliang Xu,E-mail:shlxu@dicp.ac.cn;Mao Ye,E-mail:maoye@dicp.ac.cn
Supported by:
The authors gratefully acknowledge the financial support from the Strategic Priority Research Program of Chinese Academy of Sciences (XDA21010100).

摘要/Abstract

摘要： Light olefins is the incredibly important materials in chemical industry. Methanol to olefins (MTO), which provides a non-oil route for light olefins production, received considerable attention in the past decades. However, the catalyst deactivation is an inevitable feature in MTO processes, and regeneration, therefore, is one of the key steps in industrial MTO processes. Traditionally the MTO catalyst is regenerated by removing the deposited coke via air combustion, which unavoidably transforms coke into carbon dioxide and reduces the carbon utilization efficiency. Recent study shows that the coke species over MTO catalyst can be regenerated via steam, which can promote the light olefins yield as the deactivated coke species can be essentially transferred to industrially useful synthesis gas, is a promising pathway for further MTO processes development. In this work, we modelled and analyzed these two MTO regeneration methods in terms of carbon utilization efficiency and technology economics. As shown, the steam regeneration could achieve a carbon utilization efficiency of 84.31 %, compared to 74.74 % for air combustion regeneration. The MTO processes using steam regeneration can essentially achieve the near-zero carbon emission. In addition, light olefins production of the MTO processes using steam regeneration is 12.81 % higher than that using air combustion regeneration. In this regard, steam regeneration could be considered as a potential yet promising regeneration method for further MTO processes, showing not only great environmental benefits but also competitive economic performance.

关键词: Model, Methanol to olefins, Regeneration, Greenhouse gas, Processes simulation

Abstract: Light olefins is the incredibly important materials in chemical industry. Methanol to olefins (MTO), which provides a non-oil route for light olefins production, received considerable attention in the past decades. However, the catalyst deactivation is an inevitable feature in MTO processes, and regeneration, therefore, is one of the key steps in industrial MTO processes. Traditionally the MTO catalyst is regenerated by removing the deposited coke via air combustion, which unavoidably transforms coke into carbon dioxide and reduces the carbon utilization efficiency. Recent study shows that the coke species over MTO catalyst can be regenerated via steam, which can promote the light olefins yield as the deactivated coke species can be essentially transferred to industrially useful synthesis gas, is a promising pathway for further MTO processes development. In this work, we modelled and analyzed these two MTO regeneration methods in terms of carbon utilization efficiency and technology economics. As shown, the steam regeneration could achieve a carbon utilization efficiency of 84.31 %, compared to 74.74 % for air combustion regeneration. The MTO processes using steam regeneration can essentially achieve the near-zero carbon emission. In addition, light olefins production of the MTO processes using steam regeneration is 12.81 % higher than that using air combustion regeneration. In this regard, steam regeneration could be considered as a potential yet promising regeneration method for further MTO processes, showing not only great environmental benefits but also competitive economic performance.

Key words: Model, Methanol to olefins, Regeneration, Greenhouse gas, Processes simulation

Jinqiang Liang, Danzhu Liu, Shuliang Xu, Mao Ye. Modeling and analysis of air combustion and steam regeneration in methanol to olefins processes[J]. 中国化学工程学报, 2024, 66(2): 94-103.

Jinqiang Liang, Danzhu Liu, Shuliang Xu, Mao Ye. Modeling and analysis of air combustion and steam regeneration in methanol to olefins processes[J]. Chinese Journal of Chemical Engineering, 2024, 66(2): 94-103.

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Modeling and analysis of air combustion and steam regeneration in methanol to olefins processes

Modeling and analysis of air combustion and steam regeneration in methanol to olefins processes

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