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首页> 外文期刊>Journal of industrial and engineering chemistry >Catalytic performance of vanadia-doped titania-pillared clay for the selective catalytic oxidation of H2S
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Catalytic performance of vanadia-doped titania-pillared clay for the selective catalytic oxidation of H2S

机译：钒掺杂二氧化钛桩基粘土对H2S选择性催化氧化的催化性能

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摘要

A series of vanadia-doped titania pillared clay (V/Ti-PILC) with various amounts of vanadia were prepared and their performance for the selective catalytic oxidation of H2S was investigated in this study. V/Ti-PILCs were characterized using X-ray diffraction (XRD), BET apparatus, and X-ray photoelectron spectroscopy (XPS). V/Ti-PILCs showed better catalytic performance than as such Ti-PILC at temperatures ranging from 220 to 300 °C without any considerable SO2 emission. The H2S conversion over V/Ti-PILC increased with increasing vanadia content up to 5 wt.%. This superior catalytic performance might be related to the uniform dispersion of vanadia in the form of monomeric and polymeric species. However, it decreased at 10 wt.% vanadia loading due to the decrease of surface area and to the formation of crystalline V2O5 phase. The presence of water vapor in the reactant mixture resulted in the decrease of the H2S conversion.
机译：制备了一系列含各种钒的钒掺杂二氧化钛柱状粘土（V / Ti-PILC），并研究了它们对H2S选择性催化氧化的性能。 V / Ti-PILC使用X射线衍射（XRD），BET仪器和X射线光电子能谱（XPS）进行表征。 V / Ti-PILC在220至300°C的温度下表现出比Ti-PILC更好的催化性能，并且没有任何明显的SO2排放。 V / Ti-PILC上的H2S转化率随钒含量的增加而增加，最高可达5 wt。％。这种优异的催化性能可能与钒在单体和聚合物形式中的均匀分散有关。但是，由于表面积的减少和结晶V2O5相的形成，在钒含量为10％（重量）时它降低了。反应混合物中水蒸气的存在导致H 2 S转化率降低。

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