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制备了用于正己烷临氢异构化的氧化硅担载的Keggin型杂多酸和还原态Pt-Ce氧化物催化剂.这些混合氧化物催化剂或单独使用,或与氧化硅担载的杂多酸催化剂一起使用.用X射线衍射、傅里叶变换红外光谱、傅里叶变换拉曼光谱、热重和N2物理吸附等方法表征在氧化、还原态和催化实验后的催化剂状态.本文的目的是在最佳反应条件(反应温度、还原温度和流量等)下,筛选出具有最好异构化收率的催化剂.结果表明,还原氧化物的存在不但有利于消除积炭,而且在反应期间能有效地维持氧化硅担载杂多酸的结构.从这些催化剂样品中,可以找到具有更好异构化活性和选择性的催化剂.
A silica supported Keggin-type heteropolyacid and a reduced Pt-Ce oxide catalyst for the hydroisomerization of n-hexane were prepared, either alone or in combination with silica-supported heteropoly Acid catalyst.The X-ray diffraction, Fourier transform infrared spectroscopy, Fourier transform Raman spectroscopy, thermogravimetry and N2 physisorption were used to characterize the catalyst state after oxidation, reduction and catalysis experiments.The purpose of this paper The catalyst with the best isomerization yield was screened under the best reaction conditions (reaction temperature, reduction temperature and flow rate) .The results showed that the existence of reducing oxides not only helps to eliminate coke deposition, but also during the reaction Can effectively maintain the structure of the heteropolyacid supported on silica From these catalyst samples, catalysts with better isomerization activity and selectivity can be found.