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The influence of the freeboard region in a fluidized bed catalytic cracking regenerator
Author(s) -
De Lasa Hugo I.,
Grace John R.
Publication year - 1979
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690250609
Subject(s) - freeboard , regenerative heat exchanger , fluidized bed , fluid catalytic cracking , drag , cracking , fluidization , phase (matter) , materials science , fluidized bed combustion , mechanics , particle (ecology) , nuclear engineering , environmental science , thermodynamics , waste management , engineering , chemistry , composite material , geology , physics , oceanography , heat exchanger , organic chemistry
A model is developed for a fluidized bed reactor with the dense phase region treated by conventional two‐phase models. Conversion in the freeboard is obtained based on particle trajectories predicted from drag considerations. The model is applied to an industrial‐scale catalytic cracking regenerator. It is shown that the freeboard region can have an important influence on the overall conversion in the unit.