A molecular-level coupling model of fluid catalytic cracking and
hydrotreating processes to improve gasoline quality
Abstract
A molecular-level Fluid Catalytic Cracking (FCC)-Gasoline Hydrotreating
(GH) process coupling model was established based on the Structure
Oriented Lumping (SOL) method to guide the precise control of the
hydrocarbon compositions in gasoline. 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
hydrocarbon molecules in gasoline were investigated by tracking their
generation paths and reaction paths. The influences 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.