Effect of Al Content on the Isomerization Performance of Solid Superacid Pd-S2O82-/ZrO2-Al2O3

doi:10.1016/j.cjche.2014.07.002

Abstract

Abstract: The effect of Al content on the performance of the Pd-S₂O₈^2-/ZrO₂-Al₂O₃ solid superacid catalystwas studied using n-pentane isomerization as a probe reaction. The catalysts were also characterized by X-ray diffraction (XRD), Fourier transform Infrared (FTIR), specific surface area measurements (BET), thermogravimetry-differential thermal analysis (TG-DTA), H₂-temperature programmed reduction (TPR) and NH3 temperature-programmed desorption (NH3-TPD). The Pd-S₂O₈^2-/ZrO₂-Al₂O₃ catalyst made from Al₂O₃ mass fraction of 2.5% exhibited the best performance and its catalytic activity increased by 44.0% compared with Pd-S₂O₈^2-/ZrO₂. The isopentane yield reached 64.3% at a temperature of 238℃, a reaction pressure of 2.0 MPa, a space velocity of 1.0 h^-1 and a H₂/n-pentane molar ratio of 4.0. No obvious catalyst deactivation was observed within 100 h.

Key words: Solid superacid, Catalyst, Al content, Isomerization

摘要： The effect of Al content on the performance of the Pd-S₂O₈^2-/ZrO₂-Al₂O₃ solid superacid catalystwas studied using n-pentane isomerization as a probe reaction. The catalysts were also characterized by X-ray diffraction (XRD), Fourier transform Infrared (FTIR), specific surface area measurements (BET), thermogravimetry-differential thermal analysis (TG-DTA), H₂-temperature programmed reduction (TPR) and NH3 temperature-programmed desorption (NH3-TPD). The Pd-S₂O₈^2-/ZrO₂-Al₂O₃ catalyst made from Al₂O₃ mass fraction of 2.5% exhibited the best performance and its catalytic activity increased by 44.0% compared with Pd-S₂O₈^2-/ZrO₂. The isopentane yield reached 64.3% at a temperature of 238℃, a reaction pressure of 2.0 MPa, a space velocity of 1.0 h^-1 and a H₂/n-pentane molar ratio of 4.0. No obvious catalyst deactivation was observed within 100 h.

关键词: Solid superacid, Catalyst, Al content, Isomerization

Hua Song, Na Wang, Hualin Song, Feng Li, Zaishun Jin. Effect of Al Content on the Isomerization Performance of Solid Superacid Pd-S₂O₈^2-/ZrO₂-Al₂O₃[J]. , 2014, 22(11/12): 1226-1231.

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Effect of Al Content on the Isomerization Performance of Solid Superacid Pd-S₂O₈^2-/ZrO₂-Al₂O₃

Effect of Al Content on the Isomerization Performance of Solid Superacid Pd-S₂O₈^2-/ZrO₂-Al₂O₃

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