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首页> 外文会议>International Workshop on New Sources, Novel Phases, New Applications; 20040913-16; Como(IT) >Cyclohexane photocatalytic oxidative dehydrogenation to benzene on sulphated titania supported MoO_x
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Cyclohexane photocatalytic oxidative dehydrogenation to benzene on sulphated titania supported MoO_x

机译：硫化二氧化钛负载MoO_x对环己烷光催化氧化脱氢制苯。

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摘要

The effect of sulphate on the photocatalytic properties of MoO_x/TiO_2 catalysts for cyclohexane photocatalytic oxydehydrogenation has been investigated with a gas-solid continuous flow reactor. Photocatalytic tests performed on anatase titania at different sulphate content, ranging from 0 to 2 wt%, have shown that only the total oxidation of cyclohexane occurs. Cyclohexane conversion to carbon dioxide at steady state conditions decreases as the sulphate load increases. Photocatalytic oxidative dehydrogenation of cyclohexane to benzene has been studied on MoO_3 4.7 wt % supported on sulphated titania. The presence of sulphate species on the surface of titania enhances selectivity and yield to benzene as more as higher is the sulphate content. On the catalyst with the highest sulphate content very high selectivity to benzene was obtained, very weakly dependent of cyclohexane conversion. The selectivity properties of MoO_x/TiO_2 catalysts are associated to the presence of both sulphate and polymolybdate species on the titania surface.
机译：利用气固连续流反应器研究了硫酸盐对MoO_x / TiO_2催化剂对环己烷光催化氧化脱氢的光催化性能的影响。在0至2 wt％范围内的不同硫酸盐含量下，对锐钛矿型二氧化钛进行的光催化测试表明，仅发生了环己烷的完全氧化。随着硫酸盐负荷的增加，稳态条件下环己烷向二氧化碳的转化率降低。已经在负载于硫酸二氧化钛上的4.7重量％的MoO 3上研究了环己烷光催化氧化脱氢为苯。随着硫酸盐含量的增加，二氧化钛表面上硫酸盐物质的存在会提高选择性和苯的收率。在具有最高硫酸盐含量的催化剂上，获得了对苯的非常高的选择性，非常不依赖环己烷的转化。 MoO_x / TiO_2催化剂的选择性与氧化钛表面上硫酸盐和多钼酸盐的存在有关。

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