Ga2O3对Pt／WO3／ZrO2催化剂上正庚烷异构化反应的促进作用  

The Promoting Effect of Ga_2O_3 on a Pt/WO_3/ZrO_2 Catalyst for n-Heptane Isomerization

作　　者：涂兴珺[1] 乐英红[1] 王捷[1] 翟德伟[1] 华伟明[1] 高滋[1] 

机构地区：[1]复旦大学化学系上海市分子催化和功能材料重点实验室,上海200433

出　　处：《催化学报》2009年第5期378-380,共3页

基　　金：国家重点基础研究发展计划(973计划,2006CB806103);国家自然科学基金(20633030,20773027,20773028);上海市科委(08DZ2270500)

摘　　要：考察了Ga2O3掺杂的Pt/WO3/ZrO2(Pt/WGZ)催化剂在200oC时正庚烷临氢异构化反应性能.结果表明,少量Ga2O3的加入能显著提高Pt/WGZ的催化活性,异构化选择性也有所增加,这是由于B酸位增加和B酸/L酸比的改变而引起的.Pt/WGZ催化剂连续反应80h,正庚烷转化率和异构化选择性分别稳定在76%和94%.The isomerization of n-heptane over Ga2O3-doped Pt/WO3/ZrO2 （Pt/WGZ） in the presence of H2 at 200 ℃ was studied. The incorporation of small amounts of Ga2O3 into Pt/WO3/ZrO2 increased the activity substantially and improved the isomerization selectivity to some extent. This was attributed to an enhancement of Brφnsted acidity and a changed ratio of Bronsted acidity to Lewis acidity. The Pt/WGZ catalyst gave a constant n-heptane hydroisomerization activity for over 80 h with a high n-C7 conversion （76%） and C7 isomer selectivity （94%）.

关 键 词：铂 氧化钨 氧化锆 氧化镓 正庚烷临氢异构化 酸性 

分 类 号：O643.36[理学—物理化学]