Bimetallic PtSn nanoparticles confined in hierarchical ZSM-5 for propane dehydrogenation
[Display omitted] •PtSn/hierarchical ZSM-5 catalysts were developed for propane dehydrogenation.•PtSn particles are occluded in the mesopores of hierarchical ZSM-5.•PtSn1.00/ZSM-5(0.8) catalyst shows the highest efficiency in propane dehydrogenation. A series of PtSn/hierarchical ZSM-5 catalysts wer...
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Veröffentlicht in: | Chinese journal of chemical engineering 2022-01, Vol.41 (1), p.384-391 |
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Sprache: | eng |
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•PtSn/hierarchical ZSM-5 catalysts were developed for propane dehydrogenation.•PtSn particles are occluded in the mesopores of hierarchical ZSM-5.•PtSn1.00/ZSM-5(0.8) catalyst shows the highest efficiency in propane dehydrogenation.
A series of PtSn/hierarchical ZSM-5 catalysts were developed for propane dehydrogenation, in which the PtSn bimetallic particles are confined in the mesopores of hierarchical ZSM-5 zeolite. The synthesis of PtSn/hierarchical ZSM-5 catalysts was achieved via the loading of Pt and Sn species onto the hierarchical ZSM-5 catalysts that are obtained through a desilication of conventional ZSM-5. The PtSn/hierarchical ZSM-5 catalysts were fully characterized by XRD, N2 adsorption, STEM, XPS, and CO-IR techniques, which reveals that highly dispersed PtSn bimetallic nanoparticles are enclosed into mesopores of hierarchical ZSM-5. The catalytic performance of PtSn/hierarchical ZSM-5 is greatly affected by the concentrations of alkali solution in the desilication process and Sn/Pt ratios in PtSn bimetallic particles. The PtSn1.00/ZSM-5(0.8) catalyst shows the highest efficiency in propane dehydrogenation, which gives an initial conversion of 46% and selectivity of 98% at 570 °C. The high efficiency in these PtSn/hierarchical ZSM-5 catalysts for propane dehydrogenation is mainly ascribed to the confinement of PtSn particles in the mesopores of hierarchical ZSM-5 zeolite. |
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ISSN: | 1004-9541 2210-321X |
DOI: | 10.1016/j.cjche.2021.11.020 |