铝促进的SO_4^(2-)/ZrO_2催化剂上正戊烷低温异构化  

Isomerization of n-pentane at low temperature over aluminum-promoted sulfated zirconia

作　　者：曹崇江[1] 陈长林[1] 徐南平[1] 

机构地区：[1]南京工业大学化学化工学院,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2005年第1期76-77,共2页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家基础研究计划(No 2003CB615707)项目;国家自然科学基金(No 20476047)项目;江苏省高技术项目(No BG2002017)

摘　　要：Aluminum-promoted sulfated zirconia （ASZ） catalyst was prepared by impregnation of zirconium hydroxide with aqueous Al2（SO4）3 followed by calcinations. The characterization of these samples was carried out with various techniques such as X-ray powder diffraction （XRD）, N2 adsorption （BET）, NH3 temperature-programmed desorption （NH3-TPD）. The results indicated that the addition of aluminum has an effect on acid properties of the catalysts. Isomerization of n-pentane was carried out at 2.0 MP, WHSV 0.5 and H2/pentane molar ration of 4. In comparison to sulfated zirconia （SZ）, ASZ catalyst exhibited high catalytic activity and stability at low reaction temperature. In particular, when the reaction temperature was 120 ℃, the n-pentane conversion over ASZ remains at 80%, which is closed to its equilibrium conversion after running on stream for 6 h.Aluminum-promoted sulfated zirconia (ASZ) catalyst was prepared by impregnation of zirconium hydroxide with aqueous Al_2(SO_4)_3 followed by calcinations. The characterization of these samples was carried out with various techniques such as X-ray powder diffraction (XRD), N_2 adsorption (BET), NH_3 temperature-programmed desorption (NH_3-TPD). The results indicated that the addition of aluminum has an effect on acid properties of the catalysts. Isomerization of n-pentane was carried out at 2.0 MP, WHSV 0.5 and H_2/pentane molar ration of 4. In comparison to sulfated zirconia (SZ), ASZ catalyst exhibited high catalytic activity and stability at low reaction temperature. In particular, when the reaction temperature was 120 ℃, the n-pentane conversion over ASZ remains at 80%, which is closed to its equilibrium conversion after running on stream for 6 h.

关 键 词：铝 催化剂 正戊烷 异构化 汽油 辛烷值 炼油工业 

分 类 号：TE624.9[石油与天然气工程—油气加工工程] TE624.47