مشخصات پژوهش

Zeolites are crystalline porous materials that are widely used as catalysts. Zeolites have a unique feature and show high catalytic activity and shape selectivity. Zeolite micropores may range in size from 3 to 12 Å. The difference in shape and size of micropores Creates different types of zeolites. The most famous way to create mesopores in zeolites is hydrothermal treatment in the presence of steam. Although the heating operation without steam can also create mesopores, but it causes defects in the structure of zeolite. [1] Zeolites have been used to remove sulfur compounds. Thermal stability and reusability of zeolites make them potential candidates for adsorption/desulfurization process. Zeolites with good sulfur absorption capacity, good regeneration ability and stable structure have been shown to remove sulfur compounds [2]. Adsorption methods of sulfur compounds on zeolite, charge of metal cations, number of active sites in the framework of Zeolite, acidic properties of zeolites, SiO2/Al2O3 ratio and pore size have a significant effect on sulfur absorption. In this regard, X and Y zeolites have been widely studied for the adsorption of sulfur compounds due to the feature of adjustable selectivity of zeolites. It was investigated for polar molecules and their pore size. The tendency of thiophene molecules to adsorb on zeolites increases in the order of thiophene (TP) < benzothiophene (BT) < (DBT) [3]. Hierarchical zeolite HY was prepared by using hydrothermal method and introduced polyoxometal into zeolite, desulfurization was done with the help of a catalyst, Dibenzothiophene was used as a model