Abstract: A cracking reaction network for cyclohexane and methyl-cyclohexane model compounds was established by using molecular simulation and micro-reaction tests to analyze the reasons for poor selectivity of naphthene cracking in catalytic cracking process of straight-run naphtha. It is found that, by using IM-5 zeolite with specific pore structure the ring-opening reaction selectivity of naphthene can be strengthened effectively, and more low carbon olefin obtain can be produced.

Key words: naphthalene, ring-opening selectivity, reaction network, IM-5 zeolite.