正庚烷在超稳Y沸石(USY)负载超强酸催化剂上加氢异构化  

Hydroisomerization of n-Heptane over Superacid Catalysts Supported on Ultra Stable Y (USY) Zeolite

作　　者：魏瑞平[1] 王军[1] 任晓乾[1] 蒋冬梅[1] 

机构地区：[1]南京工业大学化学化工学院,南京210009

出　　处：《无机化学学报》2004年第12期1471-1476,共6页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.20306011);江苏省青年科技基金(No.BQ2000005);江苏省高技术项目(No.BG2001044)

摘　　要：The Pt-bearing SO42-/ZrO2 superacid catalysts supported on ultra stable Y (USY) zeolite were prepared by impregnation and characterized by X-ray diffracti on, nitrogen adsorption and Hammett indicators. Their catalytic activities were evaluated in the hydroisomerization of n-heptane with an atmospheric fixed-bed r eactor. The catalysts possessed a high surface area, superacidity and well maint ained pore structure of USY support. The supported catalysts with a suitable SO4 2-/ZrO2 loading exhibited a higher catalytic activity and selectivity than the u nsupported SO42-/ZrO2 catalyst or the Pt supported on USY catalyst without super acid. At the reaction temperature of 220 ℃, over the catalyst with a Pt loading of 0.8wt% and ZrO2 loading of 10wt%, the conversion of n-heptane could be as hi gh as 35.2% with a selectivity of 87.9% for isomerization products.The Pt-bearing SO42-/ZrO2 superacid catalysts supported on ultra stable Y (USY) zeolite we re prepared by impregnation and characterized by X-ray diffraction, nitrogen adsorption and Hammett indicators. Their catalytic activities were evaluated in the hydroisomerization of n-heptane with an atmospheric fixed-bed reactor. The catalysts possessed a high surface area, superacidity and well maintained pore structure of USY support. The supported catalysts with a suitable SO42-/ZrO2 loading exhibited a higher catalytic activity and selectivity than the unsupported SO42-/ZrO2 catalyst or the Pt supported on USY catalyst without superacid. At the reaction temperature of 220 degreesC, over the catalyst with a Pt loading of 0.8wt% and ZrO2 loading of 10wt%, the conversion of n-heptane could be as high as 35.2% with a selectivity of 87.9% for isomerization products.

关 键 词：正庚烷 超稳Y沸石负载超强酸催化剂 加氢 异构化 

分 类 号：O623.11[理学—有机化学] O643.36[理学—化学]