A molecular-level coupling model of fluid catalytic cracking and hydrotreating processes to improve gasoline quality

A molecular-level Fluid Catalytic Cracking (FCC)-Gasoline Hydrotreating (GH) process coupling model was established to guide the optimization of the hydrocarbon compositions in gasoline based on the Structure Ori-ented Lumping (SOL) method. 96 FCC reaction rules and 24 GH reaction rules were formulated, and a reaction network containing about 120,000 reactions was constructed. In order to establish the FCC-GH process coupling model, the effective transfer of composition information between the two processes was realized through the molecular composition matrix of gasoline. The molecular composition matrix of gasoline was obtained according to the classification rules of the molecular composition matrix of FCC products. The conversion laws of hydro-carbon molecules in gasoline were investigated by tracking their generation paths and reaction paths. The in-fluences of reaction conditions on the distribution of hydrocarbons in the product gasoline could be calculated quantitatively by the FCC-GH process coupling model at molecular level.

Automated summary

A molecular-level FCC-GH process coupling model is established to investigate the effects of reaction conditions on the distribution of hydrocarbons in gasoline and guide the optimization of hydrocarbon compositions.