Novel Supported Superacid Catalysts: Preparation, Characterization and Reaction Studies

CTS-9406718古斯塔沃·拉森考察了沸石负载的硫酸氧化锆作固体超强酸催化剂。制备了沸石负载、硫酸化、氧化锆团簇，并研究了它们的物理形态和催化活性。一个目标是生产比块状硫化氧化锆更长寿命的催化剂。试验反应包括正丁烷异构化为异丁烷、2-甲基-2-戊烯异构化和乙基叔丁基醚的合成。使用的表征技术包括X射线衍射、透射电子显微镜、X射线吸收和傅里叶变换红外光谱。对环境的担忧导致对作为汽油添加剂的含氧物的需求大幅增加。与此同时，出于环境和职业健康的考虑，用于制造这些材料的液体超强酸催化剂正在逐步淘汰。这项研究着眼于一种固体超强酸，它可以取代这些危险的流体催化剂。这项努力的一部分还涉及在汽车燃料中使用乙醇。***

ABSTRACT CTS-9406718 Gustavo Larsen This is an investigation of the use of sulfated zirconia supported on zeolites as solid superacid catalysts. Zeolite-supported, sulfated, zirconia clusters are prepared and their physical form and catalytic activity studied. An objective is to produce catalysts with longer lifetimes than bulk sulfated zirconia. Test reactions include isomerization of n-butane to isobutane, isomerization of 2-methyl-2 pentene, and synthesis of ethyl tert-butyl ether. Characterization techniques used include X-ray diffraction, transmission electron microscopy, X-ray absorption, and Fourier-transform infrared spectroscopy. Environmental concerns have led to a large increase in the demand for oxygenates as gasoline additives. At the same time, environmental and occupational-health concerns are forcing a phase-out of the fluid superacid catalysts used to make these materials. This study looks at a solid superacid that could replace these dangerous fluid catalysts. A portion of the effort also addresses the use of ethanol in motor fuel. ***