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

本文研究了金属-载体相互作用和促进剂对L型阳离子交换沸石上铂的影响。研究了交换到沸石上的碱和碱土阳离子、载体类型（L型沸石与氧化铝）和铂粒度对铂的催化活性和电子性能的影响。对催化剂进行了庚烷脱氢、甲苯脱氢和新戊烷氢解的实验。利用吸附一氧化碳的红外光谱和x射线光电子能谱对铂的电子性质进行了表征。镀在L型钡钾沸石上的铂是一种提高无铅汽油辛烷值的活性选择性催化剂。相关系统已经证明金属-支撑相互作用会影响性能。本研究对汽油生产中使用的一系列催化剂的这种影响进行了研究，并将有助于提高催化剂的性能和/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.