Abstract

The resistance to sulfur compounds is considered for nickel, platinum, and palladium metals deposited onto acidic supports, depending on the nature of a support. Catalysts containing nickel, platinum, palladium, and their sulfides as hydro-dehydrogenating components are studied in the reaction of n-octane hydrocracking. The supports are HY, ZSM-5, ZSM-23, and ZSM-12 zeolites and SAPO-11 and SAPO-31 silicoalumophosphates. It is shown that the deposited metals in the hydrocracking catalysts have different resistances to sulfur compounds, regardless of the properties of the acidic support under the conditions of the reaction. The hydrocracking process follows two different pathways, depending on the nature of the hydro–dehydrogenating component (a metal or its sulfides), its activity, and the ratio between the activities of the acidic and hydrogenating components. The first of these determines the predominant cracking of the initial paraffin at the initial stage, while the initial paraffin is subjected to dehydrogenation on the second pathway.

中文翻译：

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基于沸石和磷酸铝的双功能加氢裂化和加氢异链烷烃化催化剂的研究，第1部分：加氢和酸性组分的性质和活性对加氢裂化催化剂活性和选择性的影响

摘要

考虑到镍，铂和钯金属沉积在酸性载体上的耐硫化合物性，具体取决于载体的性质。在n的反应中研究了含镍，铂，钯及其硫化物作为加氢脱氢组分的催化剂-辛烷加氢裂化。载体为HY，ZSM-5，ZSM-23和ZSM-12沸石以及SAPO-11和SAPO-31硅铝磷酸盐。结果表明，无论反应条件下酸性载体的性质如何，加氢裂化催化剂中沉积的金属对硫化合物的耐受性均不同。加氢裂化过程遵循两种不同的途径，这取决于加氢脱氢组分（一种金属或其硫化物）的性质，其活性以及酸性和氢化组分的活性之间的比例。这些中的第一个确定了初始状态下初始石蜡的主要裂解，而初始石蜡在第二个路径上进行了脱氢。