Preparation, characterization and performance of Pd/SiO2 catalyst for benzene catalytic hydrogenation

Abdel-Ghani Boudjahem; Afef Redjel; Tahar Mokrane

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Preparation, characterization and performance of Pd/SiO2 catalyst for benzene catalytic hydrogenation

机译：苯催化加氢的Pd / SiO2催化剂的制备，表征及性能

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Palladium nanoparticles supported on silica were prepared by hydrazine reduction in aqueous medium at room temperature. They were characterized by XRD, TEM, EDX, H2-adsorption, and H2-TPD. The catalytic properties were evaluated in the gas-phase hydrogenation of benzene in the temperature range of 75-250 °C. Metal particles with a size range of 4.0-25.8 nm were obtained. The metal surface area and hydrogen storage increase with decreasing metal particle size. The H2-TPD profiles exhibited a main peak appeared at 540 °C with two shoulders at lower (445 °C) and higher (605 °C) temperatures. These peaks were ascribed to strongly adsorbed hydrogen on the surface catalyst. The catalytic activity of the catalysts strongly depends on the metal loading. It increases with decreasing Pd loading. This is ascribed to metal surface area, which increases with decreasing Pd content.

机译：通过在室温下在水介质中通过肼还原来制备负载在二氧化硅上的钯纳米颗粒。通过XRD，TEM，EDX，H2吸附和H2-TPD对它们进行了表征。在75-250℃的温度范围内，在苯的气相加氢中评价了催化性能。获得尺寸范围为4.0-25.8nm的金属颗粒。金属表面积和储氢量随着金属粒度的减小而增加。 H2-TPD谱图显示一个主峰出现在540°C，两个肩部温度较低（445°C）和较高（605°C）。这些峰归因于表面催化剂上强烈吸附的氢。催化剂的催化活性在很大程度上取决于金属的负载量。它随着Pd负载的减少而增加。这归因于金属表面积，其随着Pd含量的减少而增加。

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《Journal of industrial and engineering chemistry》 |2012年第1期|共6页
作者
Abdel-Ghani Boudjahem; Afef Redjel; Tahar Mokrane;
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正文语种 eng
中图分类化学工业;
关键词
Nanoparticles; Palladium; Hydrazine; H2-TPD; Catalytic activity;

机译：纳米颗粒;钯;肼;H2-TPD;催化活性;

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Preparation, characterization and performance of Pd/SiO2 catalyst for benzene catalytic hydrogenation

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