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Performance of palladium and platinum supported on alumina pillared clays in the catalytic combustion of propene

机译：丙烯铝柱粘土中钯和铂的性能在丙烯催化燃烧中

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摘要

The effect that the metal content of various pillared-clay-supported catalysts may have on the oxidation of propene was studied in this work. For this purpose, an alumina pillared montmorillonite (Al-PILC) was used as a support for palladium and platinum. The catalysts, with metal loadings of between 0 and 2 wt%, were characterized by chemical analysis, nitrogen physisorption at -196 degrees C, carbon dioxide physisorption at 0 degrees C, X-ray photoelectron spectroscopy (XPS), X-ray powder diffraction (XRD), CO and H-2 chemisorption at 35 degrees C, NH3 chemisorption at 70 degrees C and temperature-programmed reduction (TPR). Bulk PdO, Pd, and palladium-alumina structures were detected for the palladium catalysts. Likewise, bulk PtO2 and small PtO2 particles, which partially interact with the support, were observed for the Pt/Al-PILC catalysts. The results obtained suggest that the propene oxidation over Pd/Al-PILC and Pt/Al-PILC is a structure sensitive reaction as the turnover frequencies are affected by metal dispersion and the structure of the surface catalysts.
机译：在这项工作中，研究了各种柱状粘土助催化剂的金属含量可能对丙烯氧化的影响。为此目的，将氧化铝柱状蒙脱石（Al-Pilc）用作钯和铂的载体。催化剂，金属载体为0和2wt％，其特征在于化学分析，在-196℃下的氮原吸收，二氧化碳物理吸附0℃，X射线光电子能谱（XPS），X射线粉末衍射（XRD），CO和H-2在35摄氏度下的化学吸附，NH3化学吸取为70℃，减少温度 - 编程（TPR）。对钯催化剂检测散装PDO，Pd和钯 - 氧化铝结构。同样，对于Pt / Al-Pilc催化剂，观察到部分与载体部分相互作用的体积PTO2和小型PTO2颗粒。得到的结果表明，Pd / Al-Pilc和Pt / Al-Pilc的丙烯氧化是结构敏感反应，因为流转频率受金属分散体的影响和表面催化剂的结构。

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  • 来源
    《RSC Advances》 |2015年第100期|共14页
  • 作者

    Aznarez A.; Gil A.; Korili S. A.;

  • 作者单位

    Univ Publ Navarra Dept Appl Chem E-31006 Pamplona Spain;

    Univ Publ Navarra Dept Appl Chem E-31006 Pamplona Spain;

    Univ Publ Navarra Dept Appl Chem E-31006 Pamplona Spain;

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  • 正文语种 eng
  • 中图分类 化学;
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