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<p>Developing a robust Pt catalyst with lower Pt loading is highly desired for propane dehydrogenation (PDH) process. SnS-1 zeolite with Sn incorporation to the silicalite-1 (S-1) zeolite framework was synthesized and applied as support for constructing PtSnS-1 catalyst. Pt was introduced into the heteroatom-containing zeolite crystals via ion exchange, which enabled Pt to exist as atomic species anchored at the Sn-containing zeolite framework. Characterizations of the catalyst in STEM, HRTEM and XPS reveal that, the PtSnS-1 catalyst constructed in this way has the active structure that allowed the catalyst to be much active and catalytic stable. The PtSnS-1 catalyst with 0.03 wt% Pt content delivered as high as 191.3&#xa0;mol·g<sub>Pt</sub><sup>−1</sup>·h<sup>− 1</sup> of propylene yielding rate at the start of the reaction with a much lower deactivation rate constant 0.002&#xa0;h<sup>− 1</sup> during 231 hours’ long-term reaction at 550 <sup>o</sup>C.</p>

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Anchoring single platinum atoms at framework Sn of the SnS-1 zeolite to construct active and stable propane dehydrogenation catalyst

  • 期刊论文

  • 发表日期：

    2025年4月26日

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  • Yingna Cui,
  • Hongyi Wang,
  • Rui Zhou,
  • Hongjiang Li,
  • Shenmin Li,
  • Xinping Wang

摘要

Developing a robust Pt catalyst with lower Pt loading is highly desired for propane dehydrogenation (PDH) process. SnS-1 zeolite with Sn incorporation to the silicalite-1 (S-1) zeolite framework was synthesized and applied as support for constructing PtSnS-1 catalyst. Pt was introduced into the heteroatom-containing zeolite crystals via ion exchange, which enabled Pt to exist as atomic species anchored at the Sn-containing zeolite framework. Characterizations of the catalyst in STEM, HRTEM and XPS reveal that, the PtSnS-1 catalyst constructed in this way has the active structure that allowed the catalyst to be much active and catalytic stable. The PtSnS-1 catalyst with 0.03 wt% Pt content delivered as high as 191.3 mol·gPt−1·h− 1 of propylene yielding rate at the start of the reaction with a much lower deactivation rate constant 0.002 h− 1 during 231 hours’ long-term reaction at 550 oC.