A series of bifunctional platinum catalysts were prepared, supported on alumina or different zeolites, some of which were submitted to either desilication or dealumination in order to modify their acidic properties. The catalysts were characterized for their structural and textural properties, their acidic properties, including distribution of acid strength and Brønsted and Lewis acidity, their metallic properties, and used in the hydrocracking of polystyrene under kinetic control, where activity in end-of-chain scission and random scission of the polymer has been quantified as well as the distribution of products. Activation energies and pre-exponential factors have been calculated from the kinetic data, and analyzed in terms of compensation effect, in order to extract conclusions on activity, active centers and reaction pathways. Finally, activation energies, both of end-of-chain and random scissions, yield to gasoline fraction and percentage of aromatics in the gasoline fraction have been correlated with catalytic properties in order to extract conclusions on the major catalytic properties affecting catalytic performance in this process, from the point of view of catalytic design.

制备了一系列双功能铂催化剂，负载在氧化铝或不同的沸石上，其中一些进行脱硅或脱铝处理以改变其酸性。催化剂的结构和质地特性，酸性特性（包括酸强度分布和布朗斯台德和路易斯酸度），金属特性均得到了表征，并在动力学控制下用于聚苯乙烯的加氢裂化，其中链端断裂具有活性聚合物的随机断裂以及产物的分布已被量化。从动力学数据中计算出了活化能和指数前因子，并根据补偿效应进行了分析，以得出有关活性，活性中心和反应途径的结论。最后，