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首页> 外文期刊>Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications >Catalytic behaviour of combined palladium-acid catalysts: use of Al and Zr-pillared montmorillonite as supports Part I.Reactivity of linear, branched and cyclic hexane hydrocarbons
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Catalytic behaviour of combined palladium-acid catalysts: use of Al and Zr-pillared montmorillonite as supports Part I.Reactivity of linear, branched and cyclic hexane hydrocarbons

机译：组合钯酸催化剂的催化行为：铝和Zr柱状蒙脱石的载体第一部分。直链，支链和环状己烷烃的反应性

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摘要

Stable and active hydroisomerisation catalysts have been prepared by impreglw:lting acid pillared clay minerals with hydrogenation--dehydrogenation functions, due to palladium. Contact reactions of hexanes on 1 wt. % Pd/alumina pillared acid-activated montmorillonite and 1 wt. % Pd/sulphated zirconium pillared sodium montmorillonite exhibit much better ac- tivities and isomerisation selectivities compared to those obtained on conventional pillared montmorillonite. The sulphated zirconium pillared sodium montmorillonite catalyst is two to three times more active than the other catalysts. The use of C6 cycoalkanes as reactants is a good indicator to quantify and to determine which parameters governs the reaction pathway either, the metal sites or the acid sites located On the support. Thus, it permits us to determine which mechanism will dominate. We propose for the adsorption step an associative mechanism between the hydrocarbon and the adsorbed hydrogen which leads on metal, on acid or on both metal plus acid catalysts to the formation of [CnH2n+3] as intermediate.
机译：稳定和活性的加氢异构化催化剂的制备方法是：浸渍由于钯而具有加氢-脱氢功能的酸性柱状粘土矿物。己烷在1 wt。 Pd /氧化铝柱撑的酸活化蒙脱土和1 wt。与传统的柱状蒙脱土相比，％Pd /硫酸化锆柱状蒙脱石钠具有更好的活性和异构化选择性。硫酸化锆柱撑的蒙脱土钠催化剂的活性是其他催化剂的两到三倍。使用C 6环烷烃作为反应物是量化和确定哪些参数控制反应途径的好指标，无论是金属位点还是位于载体上的酸位点。因此，它使我们能够确定哪种机制将占主导地位。对于吸附步骤，我们提出了碳氢化合物与被吸附的氢之间的缔合机理，其导致金属，酸或两种金属加酸催化剂形成中间体[CnH2n + 3]。

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