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根据脉冲微反条件下C_5～C_8烯烃裂解产物分布,建立烯烃裂解反应网络,通过参数估计方法确定反应网络动力学常数、反应活化能和指前因子。结果表明,随着碳数的增加,C_5～C_8烯烃单分子裂解反应速率加快。反应温度600℃时C_5～C_8正构烯烃裂解生成丙烯,其反应速率常数的比值为1:8.18:38.48:27.98,最快生成丙烯的是1-庚烯。反应温度相同,1-烯烃的主要裂解反应速率是碳数相同的2-甲基-2-烯烃的1.1～1.6倍。C_5烯烃裂解为单、双分子裂化并存的反应体系,但双分子裂解反应速率远大于单分子裂解,双分子反应占优势。
According to the distribution of cracking products of C_5 ~ C_8 olefins under pulsed micro-inversion conditions, the olefin cracking reaction network was established. The kinetic constants, activation energies and pre-exponential factors of the reaction network were determined by parameter estimation. The results showed that with the increase of carbon number, the rate of mononuclear cleavage of C_5 ~ C_8 olefins accelerated. The reaction temperature 600 ℃ C_5 ~ C_8 normal olefins cracking propylene, the reaction rate constant ratio of 1: 8.18: 38.48: 27.98, the fastest generation of propylene is 1-heptene. The reaction temperature is the same, and the main cracking reaction rate of 1-alkene is 1.1 to 1.6 times that of 2-methyl-2-alkenes with the same carbon number. C_5 olefins were cleaved into single and bimolecular coexistence reaction system. However, the bimolecular cleavage reaction rate was much higher than that of single molecule cleavage and the bimolecular reaction dominated.