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Citation: SONG Hua, SUN En-hao, LI Feng, SONG Hua-lin, SHI Yang. Effect of calcination temperature on isomerization performance of Pt-S2O82-/ZrO2-Al2O3 catalyst prepared by microemulsion[J]. Journal of Fuel Chemistry and Technology, ;2013, 41(6): 715-721. shu

Effect of calcination temperature on isomerization performance of Pt-S2O82-/ZrO2-Al2O3 catalyst prepared by microemulsion

  • 1.

    1. College of Chemistry and Chemical Engineering, Daqing 163318, China;

  • Corresponding author: SONG Hua,  SONG Hua-lin, 
  • Received Date: 10 December 2012
    Available Online: 9 February 2013

    Fund Project: 中国石油天然气股份有限公司科技风险创新研究(07-06D-01-04-03-02)。 (07-06D-01-04-03-02)

  • Pt-S2O82-/ZrO2-Al2O3(Pt-SZA-X) solid superacid catalysts were prepared by microemulsion method and characterized by XRD, BET, FT-IR, TPR and TEM. The effects of calcination temperatures on the isomerization performance were studied by using n-pentane isomerization as a probe reaction. It was found that the calcination temperature has less influence on the reduction temperature of the Pt-SZA-X,but the S content over catalyst decreased with increasing calcination temperature. The O=S=O structure formed at calcination temperature range of 600 to 650℃ and the combination between of S and catalyst support was relatively stable. The pure monoclinic phase of ZrO2 were observed with sample calcined at 650℃. When the calcination temperature is higher than 650℃, the specific surface area decreases rapidly and the loss of S6+ on the surface of catalyst is seriously. Among the catalysts obtained at various calcination temperatures, the catalyst calcined at 650℃ has appropriate amount of superacid sites and surface area and the highest isomerization activity. At reaction temperature of 230℃, pressure of 2.0 MPa, hydrogen/hydrocarbon molar ratio of 4:1 and mass hourly space velocity of 1.0 h-1, the isopentane yield is 60.8%.
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