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分别考察了不同族组成的FCC汽油、FCC汽油窄馏分和几种模型化合物(1-己烯、3-甲基戊烷、正己烷和环己烷)催化裂化生成丙烯的性能。结果表明,高烯烃含量的FCC汽油催化裂化具有较高的转化率和丙烯产率。1-己烯、3-甲基戊烷、正己烷和环己烷生成丙烯的平均速率比32.5:2.5:2.0:1。在FCC汽油窄馏分催化裂化生成丙烯过程中,轻馏分裂化生成丙烯的贡献大于重馏分,因此回炼FCC汽油轻馏分制取丙烯是一种较好的选择。1-己烯的催化裂化反应中,主要发生裂化反应,占49%～69%,并且该比例随着反应温度的升高而增大;氢转移反应占15%～28%,并且随反应温度升高先增加后减小,在550℃时达到27.50%;聚合及环化反应分别占15%～28%和10%～15%。
The catalytic cracking of FCC gasoline, FCC gasoline narrow cuts and several model compounds (1-hexene, 3-methylpentane, n-hexane and cyclohexane) from different families were investigated respectively to produce propylene. The results show that high olefin content of FCC gasoline FCC has higher conversion and propylene yield. The average rate of 1-hexene, 3-methylpentane, n-hexane and cyclohexane to propylene production was 32.5: 2.5: 2.0: 1. In the FCC gasoline narrow-cut catalytic cracking to propylene production, the light-distillate to propylene production contribution is greater than the heavy fraction, so the FCC light-oil fraction of propylene is a better choice. In the catalytic cracking reaction of 1-hexene, the cracking reaction takes place mainly, accounting for 49% -69%, and the proportion increases with the increase of the reaction temperature; the hydrogen transfer reaction accounts for 15% -28%, and with the reaction temperature The increase firstly increased and then decreased, reaching 27.50% at 550 ° C. The polymerization and cyclization reactions accounted for 15% -28% and 10-15% respectively.