关键词: catalytic pyrolysis;heavy oil;olefin;yield

Abstract: Catalytic pyrolysis of Daqing atmospheric residue on catalyst CEP-1 was investigated in a
confined fluidized bed reactor. The results show that reaction temperature, the mass ratios
of catalyst to oil and steam to oil have significant effects on product distribution and
yields of light olefins. The yields of light olefins show the maxima with the increase of
reaction temperature, the mass ratios of catalyst to oil and steam to oil, respectively.The
optimized operating conditions were determined in the laboratory, and under that condition
the yields of ethylene, propylene and total light olefins by mass were 15.9%, 20.7% and
44.3% respectively. The analysis of pyrolysis gas and pyrolysis liquid indicates that CEP-1
has good capacity of converting heavy oils into light olefins,and there is a large amount
of aromatics in pyrolysis liquid.

Key words: catalytic pyrolysis, heavy oil, olefin, yield