摘要
本文阐述了在铂催化剂上可逆和不可逆吸附氢在烷烃反应中的作用,并提出了相应的机理。研究结果表明,反应温度在一定范围内,烷烃发生不可逆解离吸附,其反应行为在很大程度上取决于氢的吸附类型。在整个反应过程中,可逆吸附氢起着沟通铂中心与不可逆吸附氢的作用,且具有加氢活性;而不可逆吸附氢则能使铂中心改性或活化载体。因此,烷烃的反应是在被不可逆吸附物种改性的活性中心上进行的。
The role of reversibly and irreversibly adsorbed hydrogen species on Pt catalyst in nhexane reaction was investigated. It was found that the irreversible dissociation of n-hexane took place over Pt catalyst within a certain temperature range, the behavior of n-hexane reaction therefore depended on hydrogen adsorption to a great extent. In the whole process, the reversible hydrogen not only had high ability of hydrogenation but acted as a bridge between Pt sites and irreversible hydrogen, while irreversible hydrogen modified Pt sites or actovated support. Thus, n-hexane reaction occured on the active sites modified by the irreversible species.
出处
《石油学报(石油加工)》
CSCD
北大核心
1994年第1期22-28,共7页
Acta Petrolei Sinica(Petroleum Processing Section)
基金
国家自然科学基金