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首页> 外文会议>2nd International Symposium Hydrotreatment/7th Eurpoean Workshop on Hydrocracking Of Oil Fractions Antwerpen, Belgium, November 14-17, 1999 >TPR and NO adsorption studies of Mo, CoMo and NiMo catalysts supported on Al_2O_3-TiO_2 mixed oxides
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TPR and NO adsorption studies of Mo, CoMo and NiMo catalysts supported on Al_2O_3-TiO_2 mixed oxides

机译：Al_2O_3-TiO_2复合氧化物负载的Mo，CoMo和NiMo催化剂的TPR和NO吸附研究

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摘要

The effect of the support composition on the surface structure of Mo, CoMo and NiMo catalysts supported on TiO_2-Al_2O_3 mixed oxides was characterizd by TPR and FT-IR spectroscopy of adsorbed NO. The incorporation of titania led essentially to an increase in the fraction of easily reduced octahedral polymeric Mo species, this being more pronounced for the promoted catalyst series. Differences in reducibility between the Ni-and Co-promoted catalysts were observed only for the rich-titania based catalysts, From the NO adsroption results, lower extenss of sulfidation for both Mo and promoter (Co or Ni) were observed in the intermediate-titania based catalysts. Possible corrleation between the NO adsorption results and those previously found for HDS activity are discussed.
机译：通过TPR和FT-IR光谱表征了载体组成对负载在TiO_2-Al_2O_3混合氧化物上的Mo，CoMo和NiMo催化剂表面结构的影响。二氧化钛的掺入实质上导致容易还原的八面体聚合物Mo种类的分数增加，这对于促进的催化剂系列而言更为明显。仅在富二氧化钛基催化剂上观察到了Ni和Co助催化剂的还原性差异。从NO吸附结果来看，在中间二氧化钛中观察到Mo和助催化剂（Co或Ni）的硫化程度均较低。碱催化剂。讨论了NO吸附结果与先前发现的HDS活性之间的可能相关性。

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