Abstract

The textural and acid–base characteristics of initial alumina and alumina modified with acetic acid at different concentrations (from 0.83 to 17.4 mol/L) were studied. It was found that treatment with acetic acid did not influence on the texture characteristics and phase composition of the supports. According to the IR-spectroscopic data on adsorbed CO, an increase in the concentration of medium-strength Lewis acid sites and an increase in the total acidity of the modified supports were observed, as compared with those of the initial alumina. Among the Pt‒Re systems, a catalyst based on the support treated with acetic acid at a concentration of 1.67 mol/L exhibited the highest activity in n-heptane reforming due to an optimal composition of the acid sites of the support.

中文翻译：

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酸改性氧化铝的表征作为重整催化剂的载体

摘要

研究了初始氧化铝和乙酸改性氧化铝在不同浓度（0.83至17.4 mol / L）下的质地和酸碱特性。发现用乙酸处理不影响载体的织构特性和相组成。根据关于吸附的CO的IR光谱数据，与初始氧化铝相比，观察到中等强度的路易斯酸位点的浓度增加和改性载体的总酸度增加。在Pt‒Re体系中，基于载体的催化剂以1.67 mol / L的乙酸浓度处理，由于载体酸性位点的最佳组成，在正庚烷重整中表现出最高的活性。