5 CONCLUSIONS
The delayed coking reaction kinetic model established based on the free
radical chain reaction mechanism and SOL method showed good reliability
on molecular distribution of coking product. The model could track the
reaction path of any specific molecule in the complex thermal cracking
reaction network. 173 structure vectors in gasoline and 1,132 structure
vectors in diesel were obtained by the calculation of the SOL
molecular-level model. And these gasoline and diesel structural vectors
were classified into isoparaffins, normal paraffins, olefins, naphthenes
and aromatics according to the discriminant rules. The influences of
operation conditions such as recycle ratio on the product distribution
could be discovered through the calculation of the molecular-level
model, which is helpful for the process optimization and precise
regulation of product composition for the delayed coking plants.