| Abstract: | According to the
structural group theory,the chemical composition of petroleum fractions can be classified
as structural groups as aromatics,naphthene,olefin and non-hydrocarbon elements etc.Among
them,aromatics and naphthene can be further divided into some sub-groups depending on
their ring distribution.The chemical reactions in heavy oil processing can be considered
as reactions occurred between groups or in the group itself.Based on a large number of
data from commercial unit and bench-scale experiments,the rules of chemical structural
conversion between feedstock and products in catalytic cracking,delayed coking and
hydrocracking were investigated.The feasibility of this theory was verified.Both chemical
nature and technological characteristics of these three main processes in heavy oil
processing were analyzed.This is favorable to refineries for the selection of rational
technical route in processing heavy oil. |
