能源化学(英文版)

能源化学(英文版) ›› 2019, Vol. 39 ›› Issue (12): 68-76.

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Revalorization of CO2 for methanol production via ZnO promoted carbon nanofibers based Cu-ZrO2 catalytic hydrogenation

Israf Ud Dina,d, Maizatul S. Shaharunb, A. Naeemc, S Tasleemd, Pervaiz Ahmade   

  1. a Department of Chemistry, College of Science and Humanities, Prince Sattam bin Abdulaziz University, Al-kharj, Saudi Arabia;
    b Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, Malaysia;
    c National Centre of Excellence in Physical Chemistry, University of Peshawar, Pakistan;
    d Chemistry Department, Kohat University of Science and Technology, Kohat, Pakistan;
    e Department of Physics, University of Azad Jammu & Kashmir, 13100 Muzaffarabad, Pakistan
  • 收稿日期:2018-12-18 修回日期:2019-01-24 出版日期:2019-12-15 发布日期:2020-12-18
  • 通讯作者: Israf Ud Din, drisraf@yahoo.com; Maizatul S. Shaharun, maizats@petronas.com.my
  • 基金资助:
    We are thankful to the Ministry of Higher Education Malaysia for providing financial support to this work via FRGS No:FRGS/1/2011/SG/UTP/02/13. Financial support provided by Universiti Teknologi PETRONAS, Malaysia is also highly appreciated.

Revalorization of CO2 for methanol production via ZnO promoted carbon nanofibers based Cu-ZrO2 catalytic hydrogenation

Israf Ud Dina,d, Maizatul S. Shaharunb, A. Naeemc, S Tasleemd, Pervaiz Ahmade   

  1. a Department of Chemistry, College of Science and Humanities, Prince Sattam bin Abdulaziz University, Al-kharj, Saudi Arabia;
    b Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, Malaysia;
    c National Centre of Excellence in Physical Chemistry, University of Peshawar, Pakistan;
    d Chemistry Department, Kohat University of Science and Technology, Kohat, Pakistan;
    e Department of Physics, University of Azad Jammu & Kashmir, 13100 Muzaffarabad, Pakistan
  • Received:2018-12-18 Revised:2019-01-24 Online:2019-12-15 Published:2020-12-18
  • Contact: Israf Ud Din, drisraf@yahoo.com; Maizatul S. Shaharun, maizats@petronas.com.my
  • Supported by:
    We are thankful to the Ministry of Higher Education Malaysia for providing financial support to this work via FRGS No:FRGS/1/2011/SG/UTP/02/13. Financial support provided by Universiti Teknologi PETRONAS, Malaysia is also highly appreciated.

摘要： A series of novel carbon nanofibers (CNFs) based Cu-ZrO2 catalysts were synthesized by deposition precipitation method. To investigate the influence of promoter, catalysts were loaded with 1, 2, 3 and 4 wt% ZnO and characterized by ICP-OES, HRTEM, BET, N2O chemisorption, TPR, XPS and CO2-TPD techniques. The results revealed that physicochemical properties of the catalysts were strongly influenced by incorporation of ZnO to the parent catalyst. Copper surface area (SCu) and dispersion (DCu) were slightly decreased by incorporation of ZnO promoter. Nevertheless, SCu and DCu were remarkably decreased when ZnO content was exceeded beyond 3 wt%. The catalytic performance was evaluated by using autoclave slurry reactor at a pressure and temperature of 30 bar and 180℃, respectively. The promotion of CuZrO2/CNFs catalyst with 3 wt% of ZnO enhanced methanol synthesis rate from 32 to 45 g kg-1 h-1. Notably, with the ZnO promotion the selectivity to methanol was enhanced to 92% compared to 78% of the un-promoted Cu-ZrO2/CNFs catalyst at the expense of a lowered CO2 conversion. In addition, the catalytic activity of this novel catalyst system for CO2 hydrogenation to methanol was compared with the recent literature data.

关键词: Methanol synthesis, Slurry reactor, Promoter effect, Chemisorption studies, CNFs, CO2 conversion

Abstract: A series of novel carbon nanofibers (CNFs) based Cu-ZrO2 catalysts were synthesized by deposition precipitation method. To investigate the influence of promoter, catalysts were loaded with 1, 2, 3 and 4 wt% ZnO and characterized by ICP-OES, HRTEM, BET, N2O chemisorption, TPR, XPS and CO2-TPD techniques. The results revealed that physicochemical properties of the catalysts were strongly influenced by incorporation of ZnO to the parent catalyst. Copper surface area (SCu) and dispersion (DCu) were slightly decreased by incorporation of ZnO promoter. Nevertheless, SCu and DCu were remarkably decreased when ZnO content was exceeded beyond 3 wt%. The catalytic performance was evaluated by using autoclave slurry reactor at a pressure and temperature of 30 bar and 180℃, respectively. The promotion of CuZrO2/CNFs catalyst with 3 wt% of ZnO enhanced methanol synthesis rate from 32 to 45 g kg-1 h-1. Notably, with the ZnO promotion the selectivity to methanol was enhanced to 92% compared to 78% of the un-promoted Cu-ZrO2/CNFs catalyst at the expense of a lowered CO2 conversion. In addition, the catalytic activity of this novel catalyst system for CO2 hydrogenation to methanol was compared with the recent literature data.

Key words: Methanol synthesis, Slurry reactor, Promoter effect, Chemisorption studies, CNFs, CO2 conversion