Abstract

Two different series of bifunctional hydroisodeparaffinization catalysts with deposited palladium and based on SAPO-11 and SAPO-31 are fabricated and studied, with (1) varied activity of the acidic component at a constant activity of the hydro–dehydrogenating component and (2) varied activity of the hydro–dehydrogenating component at a constant activity of the acidic component. It is shown that the temperature of 90% n-decane conversion on the catalysts with the same hydro–dehydrogenating activity depends linearly on the overall activity of the acidic catalyst component. The character of this dependence is identical for both structural types of SAPO-11 and SAPO-31 silicoalumophosphates. The bifunctional catalysts based on SAPO-31 are much more active than those based on SAPO-11. At the same overall activity of the acidic component, the temperature of 90% n-decane conversion on the Pd/SAPO-31 catalysts is 50°C lower than on the Pd/SAPO-11 catalysts. Ways of controlling the overall activity and selectivity of a hydroisodeparaffinization catalyst by varying the activity of the acidic and/or hydro–dehydrogenating component of a bifunctional catalyst are shown. An increase in the hydro–dehydrogenating activity of the catalyst enhances the hydroisomerizing activity of a bifunctional catalyst with virtually no changes in selectivity toward isomers. An increase in the overall activity of the acidic component also enhances the hydroisomerizing activity of a bifunctional catalyst, but appreciably alters its selectivity toward isomers.

中文翻译：

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基于沸石和铝磷酸盐的双功能加氢裂化和加氢异链烷烃化催化剂的研究，第2部分：加氢和酸性组分的活性对加氢异链烷烃化催化剂的活性和选择性的影响

摘要

基于SAPO-11和SAPO-31，制备和研究了两种不同系列的具有沉积钯的双功能加氢异链烷烃化催化剂，其中（1）在加氢脱氢组分的恒定活性下，酸性组分的活性不同；（2）加氢脱氢组分的活性处于恒定的酸性组分的活性。结果表明，温度为90％n具有相同加氢-脱氢活性的催化剂上的癸烷转化率线性地取决于酸性催化剂组分的总体活性。对于SAPO-11和SAPO-31硅铝磷酸盐的两种结构类型，这种依赖性的特征是相同的。基于SAPO-31的双功能催化剂比基于SAPO-11的双功能催化剂活性更高。在酸性组分总体活性相同的情况下，温度为90％n在Pd / SAPO-31催化剂上的癸烷转化率比在Pd / SAPO-11催化剂上的癸烷转化率低50°C。显示了通过改变双功能催化剂的酸性和/或加氢脱氢组分的活性来控制加氢异链烷烃化催化剂的总体活性和选择性的方法。催化剂加氢脱氢活性的提高增强了双官能催化剂的加氢异构化活性，而对异构体的选择性几乎没有变化。酸性组分总活性的增加也增强了双官能催化剂的加氢异构化活性，但是明显改变了其对异构体的选择性。