Enhancing CO2 methanation via doping CeO2 to Ni/Al2O3 and stacking catalyst beds

doi:10.1016/j.cjche.2024.07.021

Chinese Journal of Chemical Engineering ›› 2024, Vol. 75 ›› Issue (11): 170-180.DOI: 10.1016/j.cjche.2024.07.021

Enhancing CO₂ methanation via doping CeO₂ to Ni/Al₂O₃ and stacking catalyst beds

Yutong Pan¹, Pengju Gao¹, Shixiong Tang¹, Xiaoyu Han^1,3, Ziwen Hao², Jiyi Chen², Zhenmei Zhang², Heng Zhang¹, Xiaohui Zi¹, Maoshuai Li¹, Shiwei Wang⁴, Yue Wang¹, Xinbin Ma¹

1. School of Chemical Engineering and Technology, Key Laboratory for Green Chemical Technology of Ministry of Education, Collaborative Innovation Center of Chemical Science and Engineering, National Industry-Education Integration Platform of Energy Storage, Tianjin University, Tianjin 300350, China;
2. Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207, China;
3. Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China;
4. Zhejiang Institute of Tianjin University, Ningbo Key Laboratory of Green Petrochemical Carbon Emission Reduction Technology and Equipment, Ningbo 315200, China

Received:2024-06-01 Revised:2024-06-28 Accepted:2024-07-01 Online:2024-09-11 Published:2024-11-28
Contact: Maoshuai Li,E-mail:maoshuaili@tju.edu.cn
Supported by:
The authors acknowledge the financial support of the National Natural Science Foundation of China (22178265), Tianjin Science and Technology Project (21JCYBJC00400), and Open Project for Ningbo Key Laboratory of Green Petrochemical Carbon Emission Reduction Technology and Equipment (ZITJU2023-ZYDK001).

Enhancing CO₂ methanation via doping CeO₂ to Ni/Al₂O₃ and stacking catalyst beds

Yutong Pan¹, Pengju Gao¹, Shixiong Tang¹, Xiaoyu Han^1,3, Ziwen Hao², Jiyi Chen², Zhenmei Zhang², Heng Zhang¹, Xiaohui Zi¹, Maoshuai Li¹, Shiwei Wang⁴, Yue Wang¹, Xinbin Ma¹

1. School of Chemical Engineering and Technology, Key Laboratory for Green Chemical Technology of Ministry of Education, Collaborative Innovation Center of Chemical Science and Engineering, National Industry-Education Integration Platform of Energy Storage, Tianjin University, Tianjin 300350, China;
2. Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207, China;
3. Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China;
4. Zhejiang Institute of Tianjin University, Ningbo Key Laboratory of Green Petrochemical Carbon Emission Reduction Technology and Equipment, Ningbo 315200, China

通讯作者: Maoshuai Li,E-mail:maoshuaili@tju.edu.cn
基金资助:
The authors acknowledge the financial support of the National Natural Science Foundation of China (22178265), Tianjin Science and Technology Project (21JCYBJC00400), and Open Project for Ningbo Key Laboratory of Green Petrochemical Carbon Emission Reduction Technology and Equipment (ZITJU2023-ZYDK001).

Abstract

Abstract: This work synthesized a series of Ni/CeO₂/Al₂O₃ catalysts with varying CeO₂ doping amounts to enhance low-temperature CO₂ methanation. The introduction of CeO₂ weakens the interaction between Ni and Al₂O₃, leading to the formation of Ni-CeO₂ active sites. This results in a high dispersion of Ni and CeO₂, improved catalyst reducibility, increased number of active sites, and enhanced the CO₂ methanation. This work further investigated the impact of WHSV and catalyst stacking configuration to enhance the reaction. When the catalyst is stacked into three segments with a temperature gradient of 330 ℃, 300 ℃, and 250 ℃ under WHSV = 9000 ml·h^-1·g^-1, the CO₂ conversion significantly increases to 95%, which is remarkably close to the thermodynamic equilibrium (96%).

Key words: Ni/CeO₂/Al₂O₃, CeO₂ doping, Metal-support interaction, Stacking catalyst beds, Bed temperature

摘要： This work synthesized a series of Ni/CeO₂/Al₂O₃ catalysts with varying CeO₂ doping amounts to enhance low-temperature CO₂ methanation. The introduction of CeO₂ weakens the interaction between Ni and Al₂O₃, leading to the formation of Ni-CeO₂ active sites. This results in a high dispersion of Ni and CeO₂, improved catalyst reducibility, increased number of active sites, and enhanced the CO₂ methanation. This work further investigated the impact of WHSV and catalyst stacking configuration to enhance the reaction. When the catalyst is stacked into three segments with a temperature gradient of 330 ℃, 300 ℃, and 250 ℃ under WHSV = 9000 ml·h^-1·g^-1, the CO₂ conversion significantly increases to 95%, which is remarkably close to the thermodynamic equilibrium (96%).

关键词: Ni/CeO₂/Al₂O₃, CeO₂ doping, Metal-support interaction, Stacking catalyst beds, Bed temperature

Yutong Pan, Pengju Gao, Shixiong Tang, Xiaoyu Han, Ziwen Hao, Jiyi Chen, Zhenmei Zhang, Heng Zhang, Xiaohui Zi, Maoshuai Li, Shiwei Wang, Yue Wang, Xinbin Ma. Enhancing CO₂ methanation via doping CeO₂ to Ni/Al₂O₃ and stacking catalyst beds[J]. Chinese Journal of Chemical Engineering, 2024, 75(11): 170-180.

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Enhancing CO₂ methanation via doping CeO₂ to Ni/Al₂O₃ and stacking catalyst beds

Enhancing CO₂ methanation via doping CeO₂ to Ni/Al₂O₃ and stacking catalyst beds

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