Study on sulfur-tolerant benzene hydrogenation catalyst based on Pt-encapsulated sodalite zeolite

The sulfur resistance, activity in benzene hydrogenation and hydrogen spillover of the Pt-encapsulated sodalite zeolite Pt/SOD-M have been investigated. The prepared of Pt/SOD-M zeolite catalyst by directly hydrothermal synthesis in the presence of Pt(NH 3 ) 4 Cl 2 metal precursor and subsequently performing ion exchange with aqueous nitrate solution. The characterization of framework structure, pore textural properties and the acidity of the obtained Pt/SOD-M by XRD, N 2 adsorption–desorption and NH 3 -TPD, respectively. The hydrogen spillover of Pt/SOD-M before and after poisoning of H 2 S and its hybrid samples were examined by H 2 -TPD. Catalytic hydrogenation activity was measured by benzene hydrogenation. The results indicated that there is no catalytic hydrogenation activity for Pt/SOD-Na and Pt/SOD-K alone, whereas Pt/SOD-H and Pt/SOD ion exchanged with Mg 2+ , Ca 2+ and Ba 2+ show appreciable activity. Notably, alone Pt/SOD-H and Pt/SOD ion exchanged with Mg 2+ , Ca 2+ and Ba 2+ still show excellent catalytic benzene hydrogenation activity after poisoning of H 2 S. It was demonstrated that Pt/SOD-H, Pt/SOD-Mg, Pt/SOD-Ca and Pt/SOD-Ba not only can resist sulfur-poisoning, but also exhibit superior catalytic hydrogenation performance without mixing with spillover hydrogen receptor.