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首页> 外文期刊>Journal of Catalysis >Size effect of TS-1 supports on the catalytic performance of PtSn/TS-1 catalysts for propane dehydrogenation
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Size effect of TS-1 supports on the catalytic performance of PtSn/TS-1 catalysts for propane dehydrogenation

机译：TS-1的尺寸效果支持PTSN / TS-1催化剂的丙烷脱氢催化剂的催化性能

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摘要

Supported noble metal catalysts are extensively used for propane dehydrogenation in both the academy and industry. When the active components are fixed, the variation and improvement of the support will significantly affect the performance of the catalyst. Here we first prepared a series of PtSn/TS-1 catalysts with systematically controllable sizes of TS-1 zeolite supports. The particle sizes of the as-prepared TS-1 zeolite supports are from 100 nm to 5.72 mu m. The TS-1 supports exhibited only weak acid sites, which avoids some side-reactions such as cracking and coking. The minimal size TS-1 (similar to 100 nm)-supported PtSn catalyst gave the best catalytic performance and almost preserved the activity after a four-cycle reaction. The improved activity is ascribed to the hierarchically porous structure of the small-sized TS-1 sample, whereby diffusion hinders the mass transportation no more as certified by the Weisz-Prater criterion. The relationship between propane conversion and support size was fitted by a quadratic function. To further investigate the deactivation process, the species of deposited carbon was analyzed by in situ Raman methods. The work gave a new strategy for improving the catalytic performance of conventional supported catalysts in the PDH reaction, as well as some other heterogeneous catalysis. (C) 2017 Elsevier Inc. All rights reserved.
机译：支持的贵金属催化剂广泛用于学院和工业中的丙烷脱氢。当固定活性组分时，载体的变化和改善将显着影响催化剂的性能。在这里，我们首先制备了一系列具有系统可控的TS-1沸石支撑件的PTSN / TS-1催化剂。制备的TS-1沸石载体的粒径为100nm至5.72μm。 TS-1支持仅表现出弱酸位点，避免了一些副反应，例如开裂和焦化。最小尺寸TS-1（类似于100nm） - 支持的PTSN催化剂给出了最佳的催化性能，并且在四循环反应后几乎保留了活性。改进的活性归因于小尺寸TS-1样品的分层多孔结构，从而扩散阻碍了大规模运输，不再被Weisz-Priats标准认证。丙烷转换和支撑尺寸之间的关系被二次函数装配。为了进一步研究失活过程，通过原位拉曼方法分析沉积碳的种类。该作品给出了一种新的策略，用于改善PDH反应中常规负载型催化剂的催化性能，以及一些其他异质催化。 （c）2017年Elsevier Inc.保留所有权利。

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  • 来源
    《Journal of Catalysis》 |2017年第2017期|共10页
  • 作者

    Li Jiacheng; Li Jianmei; Zhao Zhen; Fan Xiaoqiang; Liu Jian; Wei Yuechang; Duan Aijun; Xie Zean; Liu Qinglong;

  • 作者单位

    China Univ Petr State Key Lab Heavy Oil Proc Beijing 102249 Peoples R China;

    China Univ Petr State Key Lab Heavy Oil Proc Beijing 102249 Peoples R China;

    China Univ Petr State Key Lab Heavy Oil Proc Beijing 102249 Peoples R China;

    Shenyang Normal Univ Inst Catalysis Energy &

    Environm Shenyang 110034 Liaoning Peoples R China;

    China Univ Petr State Key Lab Heavy Oil Proc Beijing 102249 Peoples R China;

    China Univ Petr State Key Lab Heavy Oil Proc Beijing 102249 Peoples R China;

    China Univ Petr State Key Lab Heavy Oil Proc Beijing 102249 Peoples R China;

    China Univ Petr State Key Lab Heavy Oil Proc Beijing 102249 Peoples R China;

    China Univ Petr State Key Lab Heavy Oil Proc Beijing 102249 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 催化;
  • 关键词

    TS-1 zeolite; Size effect; Propane dehydrogenation; Meso-/micropores; Acidity; Supports;

    机译：TS-1沸石;尺寸效果;丙烷脱氢;中间/微孔;酸度;支持;

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