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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。
This paper describes the role of reversible and irreversible adsorption of hydrogen on the alkane reaction over platinum catalysts and presents the corresponding mechanism. The results show that the reaction temperature is within a certain range, alkane irreversible dissociative adsorption, the reaction behavior depends largely on the type of hydrogen adsorption. Throughout the reaction, reversible adsorption of hydrogen plays the role of communication between platinum center and irreversible adsorption of hydrogen, and has hydrogenation activity; while irreversible adsorption of hydrogen can make platinum center modified or activated carrier. Therefore, the alkane reaction is carried out at the active center modified by irreversible adsorbed species.