论文部分内容阅读
The effect of Al content on the performance of the Pd–S2O82-/Zr O2–Al2O3solid superacid catalyst was 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 NH3temperature-programmed desorption(NH3-TPD). The Pd–S2O82-/Zr O2–Al2O3catalyst made from Al2O3 mass fraction of 2.5% exhibited the best performance and its catalytic activity increased by 44.0% compared with Pd–S2O82-/Zr O2. The isopentane yield reached64.3% at a temperature of 238 °C, a reaction pressure of 2.0 MPa, a space velocity of 1.0 h-1and a H2/n-pentane molar ratio of 4.0. No obvious catalyst deactivation was observed within 100 h.
The effect of Al content on the performance of the Pd-S2O82- / Zr O2-Al2O3solid superacid catalyst was 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 NH3temperature- programmed desorption -Al2O3catalyst made from Al2O3 mass fraction of 2.5% exhibited the best performance and its catalytic activity increased by 44.0% compared with Pd-S2O82- / ZrO2. The isopentane yield reached 64.3% at a temperature of 238 ° C, 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.