SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2018, Vol. 26 ›› Issue (3): 593-600.DOI: 10.1016/j.cjche.2017.05.015

• Energy, Resources and Environmental Technology • 上一篇    下一篇

Oxidative desulfurization of dibenzothiophene over Fe promoted Co-Mo/Al2O3 and Ni-Mo/Al2O3 catalysts using hydrogen peroxide and formic acid as oxidants

Yaseen Muhammad1,2, Ayesha Shoukat1, Ata Ur Rahman1, Haroon Ur Rashid3, Waqas Ahmad1   

  1. 1 Institute of Chemical Sciences, University of Peshawar, Khyber Pakhtunkhwa, Pakistan;
    2 School of Chemistry and Chemical Engineering, Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Guangxi 530004, China;
    3 Department of Chemistry, Sarhad University of Science and Information Technology, Peshawar, Pakistan
  • 收稿日期:2017-04-04 修回日期:2017-05-26 出版日期:2018-03-28 发布日期:2018-04-18
  • 通讯作者: Yaseen Muhammad

Oxidative desulfurization of dibenzothiophene over Fe promoted Co-Mo/Al2O3 and Ni-Mo/Al2O3 catalysts using hydrogen peroxide and formic acid as oxidants

Yaseen Muhammad1,2, Ayesha Shoukat1, Ata Ur Rahman1, Haroon Ur Rashid3, Waqas Ahmad1   

  1. 1 Institute of Chemical Sciences, University of Peshawar, Khyber Pakhtunkhwa, Pakistan;
    2 School of Chemistry and Chemical Engineering, Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Guangxi 530004, China;
    3 Department of Chemistry, Sarhad University of Science and Information Technology, Peshawar, Pakistan
  • Received:2017-04-04 Revised:2017-05-26 Online:2018-03-28 Published:2018-04-18
  • Contact: Yaseen Muhammad

摘要: This work reports the enhancing effect of a highly cost effective and efficient metal, Fe, incorporation to Co or Ni based Mo/Al2O3 catalysts in the oxidative desulfurization (ODS) of dibenzothiophene (DBT) using H2O2 and formic acid as oxidants. The influence of operating parameters i.e. reaction time, catalyst dose, reaction temperature and oxidant amount on oxidation process was investigated. Results revealed that 99% DBT conversion was achieved at 60℃ and 150 min reaction time over Fe-Ni-Mo/Al2O3. Fe tremendously enhanced the ODS activity of Co or Ni based Mo/Al2O3 catalysts following the activity order:Fe-Ni-Mo/Al2O3 > Fe-Co-Mo/Al2O3 > Ni-Mo/Al2O3 > Co-Mo/Al2O3, while H2O2 exhibited higher oxidation activity than formic acid over all catalyst systems. Insight about the surface morphology and textural properties of fresh and spent catalysts were achieved using scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray (EDX) analysis, Atomic Absorption Spectroscopy (AAS) and BET surface area analysis, which helped in the interpretation of experimental data. The present study can be deemed as an effective approach on industrial level for ODS of fuel oils crediting to its high efficiency, low process/catalyst cost, safety and mild operating condition.

关键词: Oxidative desulfurization, Fuel oil, Dibenzothiophene, Fe promoted (Co/Ni)-Mo/Al2O3 catalyst, XRD

Abstract: This work reports the enhancing effect of a highly cost effective and efficient metal, Fe, incorporation to Co or Ni based Mo/Al2O3 catalysts in the oxidative desulfurization (ODS) of dibenzothiophene (DBT) using H2O2 and formic acid as oxidants. The influence of operating parameters i.e. reaction time, catalyst dose, reaction temperature and oxidant amount on oxidation process was investigated. Results revealed that 99% DBT conversion was achieved at 60℃ and 150 min reaction time over Fe-Ni-Mo/Al2O3. Fe tremendously enhanced the ODS activity of Co or Ni based Mo/Al2O3 catalysts following the activity order:Fe-Ni-Mo/Al2O3 > Fe-Co-Mo/Al2O3 > Ni-Mo/Al2O3 > Co-Mo/Al2O3, while H2O2 exhibited higher oxidation activity than formic acid over all catalyst systems. Insight about the surface morphology and textural properties of fresh and spent catalysts were achieved using scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray (EDX) analysis, Atomic Absorption Spectroscopy (AAS) and BET surface area analysis, which helped in the interpretation of experimental data. The present study can be deemed as an effective approach on industrial level for ODS of fuel oils crediting to its high efficiency, low process/catalyst cost, safety and mild operating condition.

Key words: Oxidative desulfurization, Fuel oil, Dibenzothiophene, Fe promoted (Co/Ni)-Mo/Al2O3 catalyst, XRD