2010•Acta Petrolei Sinica(Petroleum Processing Section)Requires access
EFFECT OF PREPARATION CONDITIONS ON THE CATALYTIC ISOMERIZATION PERFORMANCE OF Pt-S_2O_8~(2-)/ZrO_2-Al_2O_3
董鹏飞, Hua Lin Song, Zhang xu Sup Dong Peng-Fei
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Abstract
To study the isomerization performance of complex support superacid catalyst,the effects of preparation conditions,such as the calcination temperature,mass fraction of Al2O3,concentration of ammonium persulfate in impregnation solution,mass fraction of Pt and activation temperature,on the catalytic activity of Pt-S2O2-8/ZrO2-Al2O3 catalysts for isomerization were studied by using n-pentane isomerization as a probe reaction.The Pt-S2O2-8/ZrO2-Al2O3 catalysts were characterized by XRD,BET,FT-IR,TG-DTA、 NH3-TPD,et al.Results showed that the Pt-S2O2-8/ZrO2-Al2O3 catalyst with 2.5% of Al2O3 and 0.10% of Pt,impregnated in the solution with 0.75 mol/L ammonium persulfate,calcinated at 650℃ and activated at 300℃,exhibited the highest catalytic activity for isomerization,over which the isopentane yield of n-pentane isomerization was 60.2% at reaction temperature of 240℃,pressure of 2.0 MPa,hydrogen/n-pentane molar ratio of 4 and MHSV of 1.0 h-1.