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用环己烷、环己烯、甲基环戊烷和甲基环戊烯等四种單体烴,分别在鉑-氧化鋁、氟氫酸-氧化鋁以及鉑-氟氫酸-氧化鋁三种催化剂上进行反应。發現鉑-氟氫酸-氧化鋁不論在脱氫或异构化以及异构脱氫等反应上都比前两种催化剂的性能优越。同时也發現鉑-氧化鋁与氟氫酸-氢化鋁并非只具有脫氫或异构化性能的單功能催化剂,而是活性較差的双功能催化剂,在鉑-氧化鋁中加入氟氫酸或在氟氫酸-氧化鋁中加入鉑以后,就都成为活性很好的双功能催化剂。根据这些結果,我們提出了鉑与氟氫酸在催化剂表面形成活性集团(或复合活性中心)的假說,并根据这种假說与試驗結果,提出了甲基环戊烷芳烃化的轉化历程,其中甲基环戊烯的异构化是最慢的步驟。
With four kinds of monomer hydrocarbons, cyclohexane, cyclohexene, methylcyclopentane and methylcyclopentene, respectively, in platinum - alumina, hydrofluoric acid - alumina and platinum - hydrogen fluoride - alumina three Kind of catalyst on the reaction. It is found that platinum-hydrofluoric acid-alumina has better performance than the former two catalysts in the dehydrogenation or isomerization and isomerization dehydrogenation reactions. It has also been found that platinum-alumina and hydrofluoric acid-aluminum hydride are not single-function catalysts having only dehydrogenation or isomerization properties, but rather less active bifunctional catalysts, adding hydrofluoric acid to platinum-alumina or Hydrogen fluoride - alumina added to platinum, it has become a very active bifunctional catalyst. Based on these results, we propose the hypothesis that platinum and hydrofluoric acid form active groups (or complex active sites) on the catalyst surface. Based on this hypothesis and the experimental results, we propose the conversion of methylcyclopentane to paraffins, in which Isomerization of methylcyclopentene is the slowest step.