Abstract
Highly active and inexpensive catalysts for propane dehydrogenation (PDH) are required for largescale propylene production in industrial application. Compared to Pt- and Cr-based catalysts, Zn-based nanomaterial is a promising candidate due to its environmental friendliness and coking-resistant but remains a great challenge. In this study, we developed a novel multi-component structure consisting of low Pt and abundant active Zn species highly dispersed on Fe-doped S-1 zeolite as PDH catalyst. Specifically, Fe-doping in S-1 support provided anchoring sites for loading Zn species with uniform distribution. Moreover, the very small amount of Pt was applied as promoter, which is beneficial to achieve the re-dispersion of Zn species with the formation of Znδ+ and Zn2+ active sites. The resulting 0.05Pt5Zn1Fe@S-1 catalyst exhibited the outstanding performance (conversion of propane: 40%, selectivity of propylene: 85%, and yield of propylene: 31.39%) as well as satisfactory regeneration ability. This improvement can be ascribed to the synergistic coupling between Pt promoter and the highly dispersed Zn species on modified S-1 support. This study opens a new way to design efficient and stable dehydrogenation catalysts.
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