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

doi:10.1016/j.cjche.2017.05.015

Abstract

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

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

Yaseen Muhammad, Ayesha Shoukat, Ata Ur Rahman, Haroon Ur Rashid, Waqas Ahmad. Oxidative desulfurization of dibenzothiophene over Fe promoted Co-Mo/Al₂O₃ and Ni-Mo/Al₂O₃ catalysts using hydrogen peroxide and formic acid as oxidants[J]. Chin.J.Chem.Eng., 2018, 26(3): 593-600.

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

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

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