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首页> 外文会议>Conference on Access in Nanoporous Materials >Mesoporous synthetic clays: synthesis, characterization, and use as HDS catalyst supports
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Mesoporous synthetic clays: synthesis, characterization, and use as HDS catalyst supports

机译：介孔合成粘土：合成，表征和用作HDS催化剂载体

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Mesoporous synthetic clays (MSCs) are obtained when polymer-containing silicate gels are hydrothermally crystallized to form layered magnesium silicate hectorite clays containing polymers that are incorporated in situ. Polyvinylpyrrolidone of several average molecular weights ranging from 10K to l.3M, in gel loadings varying from 5-30 wt%, were used. The organic polymer template molecules were removed from synthetic polymer-clay complexes via calcination. Pore radii, surface areas, and pore Volumes of the resulting porous inorganic networks were then measured. For the most part there is a direct correlation between both PVP molecular weight and polymer loading on the diameter of the average pore. In addition to conventional techniques, the polymer-clay materials were also characterized by small angle x-ray scattering to ascertain the disposition of the polymeric matrix. The MSC materials after calcination were examined as potential supports for hydrodesulfurization (HDS). They were loaded with a bimetallic Co/Mo catalyst system for comparison with a commercial Co/Mo alumina catalyst. Dibenzothiophene (DBT) diluted with hexadecane (0.75 wt% S) was utilized as a liquid feed for the HDS tests. This feed was chosen as a deep HDS test of a heavy model oil. The pore diameters of the MSC catalysts were found to have a strong effect on both the HDS activity and selectivity.
机译：当含聚合物的硅酸盐凝胶被水热结晶以形成含有原位掺入的聚合物的层状硅酸镁锂铜矿粘土时，获得介孔合成粘土（MSCs）。使用几种平均分子量的聚乙烯吡咯烷酮，范围为10k至l.3m，在不同5-30wt％的凝胶载量中。通过煅烧从合成聚合物 - 粘土配合物中除去有机聚合物模板分子。然后测量所得多孔无机网络的孔径半径，表面区域和孔体积。在大多数情况下，PVP分子量与聚合物载荷在平均孔径上的直径之间存在直接相关性。除了常规技术之外，聚合物 - 粘土材料还表征了小角度X射线散射，以确定聚合物基质的布置。检查煅烧后的MSC材料作为加氢脱硫（HDS）的潜在支撑件。它们用双金属Co / Mo催化剂系统装载，以与商业CO / MO氧化铝催化剂进行比较。用十六烷（0.75wt％S）稀释的二苯甲酸丁烯（DBT）用作HDS试验的液体进料。选择该饲料作为重型油的深层HDS测试。发现MSC催化剂的孔径对HDS活性和选择性具有很强的影响。

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