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Three‐dimensional flow patterns in cracking furnaces with long‐flame burners
Author(s) -
Heynderickx Geraldine J.,
Oprins Arno J. M.,
Marin Guy B.,
Dick Erik
Publication year - 2001
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.690470215
Subject(s) - cracking , naphtha , combustion , heat transfer , combustor , chemistry , flue gas , methane , mechanics , thermodynamics , pyrolysis , fluid catalytic cracking , flow (mathematics) , computational fluid dynamics , physics , organic chemistry , catalysis
A 3‐D computational fluid‐dynamics model containing equations for mass, heat and momentum transfer and using a k‐ϵ closure model, was used to calculate the 3‐D flue‐gas flow pattern and the corresponding 3‐D temperature field for a pyrolysis furnace. The computational fluid dynamics model is combined with a reactor model for the cracking tubes and a radiation model for the radiative heat transfer in the furnace box. Detailed reaction kinetics for the naphtha cracking reactions in the tubes nnd a five‐step reaction mechanism for the combustion qf methane in the flames were used. This complete model reveals asymmetric flow patterns in a naphtha‐cracking furnace with 4/2/1 split‐coil reactors and fired with long‐flame burners.