Research Initiation: Effect of Metal-Support Interactions on Heptane Dehydrocylization over Platinum on Barium- Potassium Zeolite L

本文研究了金属与载体的相互作用及其对阳离子交换沸石负载铂的助剂作用，考察了碱金属离子和碱土阳离子交换到沸石中、载体类型(L沸石与氧化铝)、铂的粒度对铂的催化活性和电子性质的影响。对催化剂进行了庚烷脱氢环化、甲苯脱氢和新戊烷氢解试验。用吸附一氧化碳的红外光谱和X射线光电子能谱表征了铂的电子性质。在L钡钾分子筛上沉积的铂是无铅汽油辛烷值提高的活性和选择性催化剂。相关系统已经证明了影响性能的金属-支撑物相互作用。这项研究考察了汽油生产中使用的一系列催化剂的这种影响，并应有助于提高催化过程的性能和/或更好地控制催化过程。

This is a study of metal-support interactions and promoter effects on platinum supported on cation-exchanged zeolite L. The effects of alkali and alkaline earth cations exchanged into the zeolite, the type of support (zeolite L versus alumina), and platinum particle size on the catalytic activity and electronic properties of the platinum are studied. The catalysts are tested for heptane dehydrocyclization, toluene dehydrogenation, and neopentane hydrogenolysis. The electronic properties of platinum are characterized by infrared spectroscopy of adsorbed carbon monoxide and by X-ray photoelectron spectroscopy. Platinum deposited on barium-potassium zeolite L is an active and selective catalyst for the octane enhancement of unleaded gasoline. Related systems have demonstrated metal-support interaction that influence performance. This study investigates such effects in a series of catalysts used in production of gasoline and should lead to improved performance and/or better control in the catalytic processes.