SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2019, Vol. 27 ›› Issue (2): 349-361.DOI: 10.1016/j.cjche.2018.08.028

• Catalysis, Kinetics and Reaction Engineering • 上一篇    下一篇

Synergistic interaction of metal–acid sites for phenol hydrodeoxygenation over bifunctional Ag/TiO2 nanocatalyst

Andrew Ng Kay Lup1, Faisal Abnisa1, Wan Mohd Ashri Wan Daud1, Mohamed Kheireddine Aroua2,3   

  1. 1 Department of Chemical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia;
    2 Centre for Carbon Dioxide Capture and Utilization, School of Science and Technology, Sunway University, Bandar Sunway, 47500 Petaling Jaya, Malaysia;
    3 Department of Engineering, Lancaster University, Lancaster LA1 4YW, UK
  • 收稿日期:2018-02-21 修回日期:2018-07-05 出版日期:2019-02-28 发布日期:2019-03-18
  • 通讯作者: Andrew Ng Kay Lup, Faisal Abnisa, Wan Mohd Ashri Wan Daud, Mohamed Kheireddine Aroua

Synergistic interaction of metal–acid sites for phenol hydrodeoxygenation over bifunctional Ag/TiO2 nanocatalyst

Andrew Ng Kay Lup1, Faisal Abnisa1, Wan Mohd Ashri Wan Daud1, Mohamed Kheireddine Aroua2,3   

  1. 1 Department of Chemical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia;
    2 Centre for Carbon Dioxide Capture and Utilization, School of Science and Technology, Sunway University, Bandar Sunway, 47500 Petaling Jaya, Malaysia;
    3 Department of Engineering, Lancaster University, Lancaster LA1 4YW, UK
  • Received:2018-02-21 Revised:2018-07-05 Online:2019-02-28 Published:2019-03-18
  • Contact: Andrew Ng Kay Lup, Faisal Abnisa, Wan Mohd Ashri Wan Daud, Mohamed Kheireddine Aroua

摘要: The use of silver metal for hydrodeoxygenation (HDO) applications is scarce and different studies have indicated of its varying HDO activity. Several computational studies have reported of silver having almost zero turnover frequency for HDO owing to its high C-O bond breaking energy barrier and low carbon and oxygen binding energies. Herein this work, titania supported silver catalysts were synthesized and firstly used to examine its phenol HDO activity via experimental reaction runs. BET, XRD, FESEM, TEM, EDX, ICP-OES, Pyridine-FTIR, NH3-TPD and H2-TPD analyses were done to investigate its physicochemical properties. Phenomena of hydrogen spillover and metal- acid site synergy were examined in this study. With the aid of TiO2 reducible support, hydrogen spillover and metal-acid site interactions were observed to a certain extent but were not as superior as other Pt, Pd, Ni-based catalysts used in other HDO studies. The experimental findings showed that Ag/TiO2 catalyst has mediocre phenol conversion but high benzene selectivity which confirms the explanation from other computational studies.

关键词: Silver based catalyst, Physicochemical properties, Hydrogen spillover, Metal&ndash, acid sites, Hydrodeoxygenation

Abstract: The use of silver metal for hydrodeoxygenation (HDO) applications is scarce and different studies have indicated of its varying HDO activity. Several computational studies have reported of silver having almost zero turnover frequency for HDO owing to its high C-O bond breaking energy barrier and low carbon and oxygen binding energies. Herein this work, titania supported silver catalysts were synthesized and firstly used to examine its phenol HDO activity via experimental reaction runs. BET, XRD, FESEM, TEM, EDX, ICP-OES, Pyridine-FTIR, NH3-TPD and H2-TPD analyses were done to investigate its physicochemical properties. Phenomena of hydrogen spillover and metal- acid site synergy were examined in this study. With the aid of TiO2 reducible support, hydrogen spillover and metal-acid site interactions were observed to a certain extent but were not as superior as other Pt, Pd, Ni-based catalysts used in other HDO studies. The experimental findings showed that Ag/TiO2 catalyst has mediocre phenol conversion but high benzene selectivity which confirms the explanation from other computational studies.

Key words: Silver based catalyst, Physicochemical properties, Hydrogen spillover, Metal&ndash, acid sites, Hydrodeoxygenation