对丙烷和丁烷进行模拟裂解;对典型的石脑油、煤油和柴油原料进行裂解评价,对比分析原料物性对裂解产物分布的影响;最后在石脑油中掺杂10 wt%和20 wt%柴油进行共裂解评价。结果表明,轻质原料裂解性能优于重质原料,轻烃原料混合裂解时异构烷烃含量不宜过高,正构烷烃含量高的石脑油原料和芳烃指数(BMCI)小,链烷烃含量越高的煤油和柴油原料裂解性能较好,石脑油中加入少量柴油混合裂解对高附加值产物收率影响较小。

Steam cracking is the most mature process for the production of light olefins,which is the core of the modern petrochemical industry.In this work,the cracking of propane and butane is simulated.Typical cracking feedstocks such as naphtha,kerosene,and diesel fuel are evaluated,and the influences of feedstocks physical properties on the distribution of the cracking products are comparatively analyzed.Co-cracking of naphtha blended with 10 wt.% and 20 wt.% of diesel fuel respectively is evaluated.Study results show that the cracking performance of light feedstocks is better than that of heavy feedstocks.The content of isomeric alkanes in light hydrocarbon feedstocks should not be too high in mixed cracking.Naphtha feedstocks with high content of n-alkanes,and kerosene and diesel feedstocks with small BMCI and higher chain alkane content exhibit better cracking performance.When a small amount of diesel fuel is added into naphtha for cracking,the yield of high value-added products is affected slightly.

廖思航(2000-),男,硕士生,研究方向为乙烯裂解原料评价,liaosihang2019@163.com;曾兴业(1982-),男,博士,正高级实验师,研究方向为油品清洁化利用与乙烯裂解原料评价,通讯联系人,zengxingye@gdupt.edu.cn。