Ga促进的Pt/WO_3/ZrO_2催化剂上正庚烷异构化  

Isomerization of n-heptane over Ga promoted Pt/WO_3/ZrO_2 catalyst

作　　者：栾晓[1] 秦丽珍[1] 陈晓蓉[1] 陈长林[1] 

机构地区：[1]南京工业大学化学化工学院材料化学工程国家重点实验室,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2008年第4期6-10,共5页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(20476047);中石化股份有限公司资助项目(104010)

摘　　要：在固定床反应器上,研究Ga促进的Pt/WO3/ZrO2(Pt/WZ)催化剂上正庚烷异构化,并采用H2程序升温脱附质谱(H2-TPD-MS)技术研究Pt/WZ上引入Ga对H2吸附能力的影响.结果表明,引入Ga明显提高了Pt/WZ催化剂上正庚烷异构化反应的活性;随反应温度的升高,正庚烷异构化反应转化率增大,反应6 h以内,该系列催化剂不失活;体积空速1.0 h-1,氢油摩尔比14时,Ga的质量分数1.0%的Pt/GWZ催化剂上,正庚烷转化率和异庚烷选择性达到最佳值,分别为81.5%和93.6%.H2-TPD-MS结果表明,引入Ga提高了Pt/WZ催化剂对H2的吸附能力,有利于提高该催化剂上正庚烷异构化反应活性.Isomerization of n-heptane over Ga promoted Pt/WO3/ZrO2 （Pt/GWZ） catalyst was investigated in a fixed bed reactor. The adsorption of H2 on the catalysts was characterized by H2-TPD-MS. The results showed that the catalytic activity of n-heptane isomerizafion was significantly improved with Ga addition to Pt/WO3/ZrO2 （ Pt/ WZ）. The conversion of n-heptane over Pt/GWZ was increased with the temperature and the deactivation of cata- lyst after the reaction for six hours was not observed. At the volume hour space velocity 1.0 h^-1 and n（H2）/ n（C7） = 14, the conversion of 81.5% for n-heptane was achieved and the selectivity of i-heptane reached 93.6% over Pt/GWZ catalyst with 1.0% Ga content. H2-TPD-MS results showed that the addition of Ga to Pt/WZ promoted H2 adsorption, thus increasing the activity of n-heptane isomerization.

关 键 词：GA WO3 ZRO2 正庚烷 异构化 

分 类 号：TQ426.94[化学工程]