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Influence of the ZrO_2 and its content on the behaviour of Pd /ZrO_2-Al_2O_3 catalysts for hydrodesulfurization of thiophene

Xun Lu

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Abstract

A series of Pd /ZrO2-Al2O3 catalysts with different ZrO2 content were prepared by wet impregnation method.The effect of the ZrO2-Al2O3 mixed oxide and ZrO2 content on the activity of the hydrodesulfurization(HDS) of thiophene over Pd based catalysts was evaluated in a fixed-bed reactor.XRD,H2 adsorption and NH3-TPD techniques were used.The results indicated a suitable ZrO2 content on the ZrO2-Al2O3 mixed oxide leaded to a significant increase of the dispersion of supported palladium oxide species.Compared with Pd/Al2O3,the reduction of palladium oxide species supported on ZrO2-Al2O3 supports proceeded easily due to a weaker metal–support interaction.The maximum in HDS activity was observed for Pd/ZrO2-Al2O3 catalysts with the ZrO2 content(12wt.%).

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A series of Pd /ZrO2-Al2O3 catalysts with different ZrO2 content were prepared by wet impregnation method.The effect of the ZrO2-Al2O3 mixed oxide and ZrO2 content on the activity of the hydrodesulfurization(HDS) of thiophene over Pd based catalysts was evaluated in a fixed-bed reactor.XRD,H2 adsorption and NH3-TPD techniques were used.The results indicated a suitable ZrO2 content on the ZrO2-Al2O3 mixed oxide leaded to a significant increase of the dispersion of supported palladium oxide species.Compared with Pd/Al2O3,the reduction of palladium oxide species supported on ZrO2-Al2O3 supports proceeded easily due to a weaker metal–support interaction.The maximum in HDS activity was observed for Pd/ZrO2-Al2O3 catalysts with the ZrO2 content(12wt.%).

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Available abstract

A series of Pd /ZrO2-Al2O3 catalysts with different ZrO2 content were prepared by wet impregnation method.The effect of the ZrO2-Al2O3 mixed oxide and ZrO2 content on the activity of the hydrodesulfurization(HDS) of thiophene over Pd based catalysts was evaluated in a fixed-bed reactor.XRD,H2 adsorption and NH3-TPD techniques were used.The results indicated a suitable ZrO2 content on the ZrO2-Al2O3 mixed oxide leaded to a significant increase of the dispersion of supported palladium oxide species.Compared with Pd/Al2O3,the reduction of palladium oxide species supported on ZrO2-Al2O3 supports proceeded easily due to a weaker metal–support interaction.The maximum in HDS activity was observed for Pd/ZrO2-Al2O3 catalysts with the ZrO2 content(12wt.%).

Key concepts: Hydrodesulfurization, Thiophene, Catalysis, Oxide, Palladium, Inorganic chemistry, Materials science, Dispersion (optics)

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Influence of the ZrO_2 and its content on the behaviour of Pd /ZrO_2-Al_2O_3 catalysts for hydrodesulfurization of thiophene — Research Paper | ScholarLens