SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2024, Vol. 75 ›› Issue (11): 170-180.DOI: 10.1016/j.cjche.2024.07.021

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

Yutong Pan1, Pengju Gao1, Shixiong Tang1, Xiaoyu Han1,3, Ziwen Hao2, Jiyi Chen2, Zhenmei Zhang2, Heng Zhang1, Xiaohui Zi1, Maoshuai Li1, Shiwei Wang4, Yue Wang1, Xinbin Ma1   

  1. 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
  • 收稿日期:2024-06-01 修回日期:2024-06-28 接受日期:2024-07-01 出版日期:2024-11-28 发布日期:2024-09-11
  • 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).

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

Yutong Pan1, Pengju Gao1, Shixiong Tang1, Xiaoyu Han1,3, Ziwen Hao2, Jiyi Chen2, Zhenmei Zhang2, Heng Zhang1, Xiaohui Zi1, Maoshuai Li1, Shiwei Wang4, Yue Wang1, Xinbin Ma1   

  1. 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:2024-11-28 Published:2024-09-11
  • 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).

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

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