In this study,the infl uence of CeO_(2) loading(5-30 wt%)on the structure and hydrodesulfurization(HDS)performance of Ni-based catalysts for dibenzothiophene(DBT)removal was systematically investigated.Catalysts were ...In this study,the infl uence of CeO_(2) loading(5-30 wt%)on the structure and hydrodesulfurization(HDS)performance of Ni-based catalysts for dibenzothiophene(DBT)removal was systematically investigated.Catalysts were synthesized via incipient wetness co-impregnation and characterized by XRD,N2 adsorption-desorption,SEM,TEM,XPS,and H_(2)-TPR.Results showed that CeO_(2) incorporation improved Ni dispersion and reducibility,with the 10%NiO-30%CeO_(2)/Al_(2)Ocatalyst achieving 99.6%DBT conversion and 90%biphenyl(BP)selectivity under optimal conditions(340℃,4 MPa,WHSV=6 h^(-1)).The presence of CeO_(2) promoted the direct desulfurization(DDS)pathway,reducing hydrogen consumption and preserving aromatic structures.Structural analysis revealed that CeO_(2) enhanced metal-support interactions,leading to the formation of interfaces between Ni and CeO_(2) and improved sulfidation efficiency.These findings provide insights into the design of high-performance Ni-CeO_(2) catalysts for ultra-deep HDS applications.展开更多
基金supported financially by the project of Tianchi Talent(BT-2025-TCYC-0059)the Science and Technology Commission of Shanghai Municipality(10dz2220500).
文摘In this study,the infl uence of CeO_(2) loading(5-30 wt%)on the structure and hydrodesulfurization(HDS)performance of Ni-based catalysts for dibenzothiophene(DBT)removal was systematically investigated.Catalysts were synthesized via incipient wetness co-impregnation and characterized by XRD,N2 adsorption-desorption,SEM,TEM,XPS,and H_(2)-TPR.Results showed that CeO_(2) incorporation improved Ni dispersion and reducibility,with the 10%NiO-30%CeO_(2)/Al_(2)Ocatalyst achieving 99.6%DBT conversion and 90%biphenyl(BP)selectivity under optimal conditions(340℃,4 MPa,WHSV=6 h^(-1)).The presence of CeO_(2) promoted the direct desulfurization(DDS)pathway,reducing hydrogen consumption and preserving aromatic structures.Structural analysis revealed that CeO_(2) enhanced metal-support interactions,leading to the formation of interfaces between Ni and CeO_(2) and improved sulfidation efficiency.These findings provide insights into the design of high-performance Ni-CeO_(2) catalysts for ultra-deep HDS applications.
