银丝上环氧丙烷分解反应的研究

环氧丙烷均相热分解的反应机理在文献中存在着争论。Thompson和Meissner认为环氧丙烷先异构化为丙醛,生成的激活丙醛分子进一步反应得到一氧化碳、乙烯、乙烷和氢等产物。Lossing等根据在1100K高温下进行的均相热分解反应推断环氧丙烷在裂解过程中首先异构化为丙酮。Benson从热化学动力学的观点出发,认为环氧丙烷因活化形式的不同可以生成两种形式的双启由基,它们分别产生丙醛和丙酮。我们设计的热絲真空反应器曾应用于环氧乙烷在银絲表面的分解反应,发现同均相

STUDY OF DISSOCIATION OF PROPYLENE OXIDE AT A SILVER WIRE

Propylene oxide catalytically dissociates at the silver wire. The first-step product of this reaction is not acetone, but propyl aldehyde. According to the new assumptions suggested, the reaction probability per encounter has been simulated by p_m=∫~∞_(E_0) 1/(kT) e~(-E/kT)dE/∫~∞_(E_d) 1/(kT)e~(-E/kT)dEand a satisfactory result has been achieved in both qualitative and quantitative aspects. The energy transfer efficiency at gas-solid surface and the essence of catalytic action have also been reviewed concisely.