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首页> 外文会议>Air and Waste Management Association annual conference and exhibition >The Catalytic Oxidation of Short-chain Alkane VOCs Using Metal Oxide Modified Titania Supported Palladium Catalysts
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The Catalytic Oxidation of Short-chain Alkane VOCs Using Metal Oxide Modified Titania Supported Palladium Catalysts

机译：金属氧化物修饰的二氧化钛负载钯催化剂催化短链烷烃挥发性有机化合物的催化氧化

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The activity of a palladium/titania catalyst for propane oxidation has been promoted by the addition of varying loadings of tungsten by impregnation. The addition of WO_x to the Pd/TiO_2 catalysts led to a significant increase in the activity for propane oxidation. The improved activity of tungsten-promoted Pd/TiO_2 catalysts has been related to the presence of vacant sites at the interface between the WO_x species and the PdO nanoparticles, generating new sites where propane molecules can be adsorbed and oxidized by oxygen species from the adjacent palladium sites. Additionally, for the tungsten promoted Pd/TiO_2 catalysts the catalytic activity increases with increasing tungsten loading. This has been explained in terms of the PdO particle size, which increases with the tungsten loading and is a structure sensitive reaction. These catalysts have demonstrated high activity for short chain alkane oxidation and they are now worthy of further study for their wider applications for VOC abatement. Next steps in this work will focus on the activity of these catalysts for the total oxidation of a wider range of hydrocarbons and other VOCs. We also plan to probe the efficiency of destruction of VOC mixtures and assess longer term catalyst stability.
机译：钯/二氧化钛催化剂对丙烷氧化的活性已经通过通过浸渍添加不同的钨负载量而得到提高。向Pd / TiO_2催化剂中加入WO_x导致丙烷氧化活性显着提高。钨促进的Pd / TiO_2催化剂活性的提高与WO_x物种与PdO纳米颗粒之间的界面上存在空位有关，从而产生了新的位点，丙烷分子可以被相邻钯中的氧物种吸附和氧化网站。另外，对于钨促进的Pd / TiO_2催化剂，催化活性随着钨载量的增加而增加。这已经根据PdO粒度进行了解释，PdO粒度随着钨的负载而增加，并且是结构敏感的反应。这些催化剂已显示出对短链烷烃氧化的高活性，由于其在减少VOC方面的广泛应用，现在值得进一步研究。这项工作的下一步将集中在这些催化剂对更广泛范围的碳氢化合物和其他VOC进行总氧化的活性上。我们还计划探测破坏VOC混合物的效率，并评估催化剂的长期稳定性。

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