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Catalytic combustion of propane over mixed oxides derived from Cu_xMg_(3-x)Al hydrotalcites

机译:源自Cu_xMg_(3-x)Al水滑石的混合氧化物对丙烷的催化燃烧

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摘要

Cu-based mixed oxides (Cu_xMg_(3_x)AlO-800s, x - 0,0.5,1.0,1.5,2.0 and 3.0) were prepared by calcinations of corresponding Cu_xMg_(3_x)Al ternary hydrotalcites (Cu_xMg_(3_x_Al-HTLCs) at 800 °C and used for catalytic combustion of propane. The Cu_xMg_(3_x)Al ternary hydrotalcites and derived combustion catalysts were well characterized to investigate the dependence of the performance of propane catalytic combustion with their structure and components. The results showed that Cu can replace Mg in a wide range of Cu/Mg ratios to form Cu_xMg_(3_x)Al-HTLCs with the unique layered structure of hydrotalcite, though the Cu substitution significantly deteriorates the thermal stability of the Cu_xMg_(3_x)Al-HTLCs. It was found that calcinations at 800 °C completely transformed the Cu_xMg_(3_x)Al-HTLCs to Cu_xMg_(3_x)A10-800 mixed oxides, containing spinel, periclase and tenorite oxide phases. The TPR results revealed those catalysts derived from hydrotalcites were easier to be reduced than the simply mixed oxides, this was due to the strong interactions among the components existing in the Cu_xMg_(3_x)A10-800 materials. The Cu_xMg_(3_x)AlO-800 catalysts exhibit superior catalytic activity in propane combustion to Pd/Al_2O_3 and the mechanically mixed oxides. The excellent activities of the Cu_xMg_(3_x)A10-800 were attributed to the strong interaction among the component oxides as observed by the XRD, TG-DSC and TPR characterizations.
机译:铜基混合氧化物(Cu_xMg_(3_x)AlO-800s,x-0,0.5,1.0,1.5,2.0和3.0)是通过在800℃下煅烧相应的Cu_xMg_(3_x)Al三元水滑石(Cu_xMg_(3_x_Al-HTLCs)制备的°C用于丙烷催化燃烧,对Cu_xMg_(3_x)Al三元水滑石和衍生的燃烧催化剂进行了表征,研究了丙烷催化燃烧性能与其结构和组分之间的关​​系,结果表明Cu可以代替Mg尽管Cu的取代显着降低了Cu_xMg_(3_x)Al-HTLCs的热稳定性,但在宽范围的Cu / Mg比下形成具有水滑石独特层状结构的Cu_xMg_(3_x)Al-HTLCs。 TPR结果表明,在800°C下,Cu_xMg_(3_x)Al-HTLCs完全转变为Cu_xMg_(3_x)A10-800混合氧化物,其中包含尖晶石,周长石和锰铁矿氧化物相。 s暗示混合氧化物,这是由于存在于Cu_xMg_(3_x)A10-800材料中的组分之间的强相互作用。 Cu_xMg_(3_x)AlO-800催化剂在丙烷燃烧中表现出优于Pd / Al_2O_3和机械混合氧化物的催化活性。通过XRD,TG-DSC和TPR表征观察到,Cu_xMg_(3_x)A10-800的出色活性归因于组分氧化物之间的强相互作用。

著录项

  • 来源
    《Fuel》 |2012年第2012期|p.257-263|共7页
  • 作者单位

    Department of Chemistry, Inorganic Chemistry Laboratory, University of Oxford, Oxford 0X1 3QR, UK Jesus College, University of Oxford, Oxford 0X1 3DW, UK;

    Department of Chemistry, Inorganic Chemistry Laboratory, University of Oxford, Oxford 0X1 3QR, UK;

    Department of Chemistry, Inorganic Chemistry Laboratory, University of Oxford, Oxford 0X1 3QR, UK;

    Department of Chemistry, Inorganic Chemistry Laboratory, University of Oxford, Oxford 0X1 3QR, UK;

    Department of Chemistry, Inorganic Chemistry Laboratory, University of Oxford, Oxford 0X1 3QR, UK;

    Department of Chemistry, Inorganic Chemistry Laboratory, University of Oxford, Oxford 0X1 3QR, UK;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Cu_xMg_(3_x)AIO mixed oxides; hydrotalcite; propane; catalytic combustion;

    机译:Cu_xMg_(3_x)AlO复合氧化物;水滑石;丙烷催化燃烧;

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