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Modeling Fischer–Tropsch kinetics and product distribution over a cobalt catalyst
Author(s) -
Pandey Umesh,
Runningen Anders,
Gavrilović Ljubiša,
Jørgensen Erik A.,
Putta Koteswara R.,
Rout Kumar R.,
Rytter Erling,
Blekkan Edd A.,
Hillestad Magne
Publication year - 2021
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.17234
Subject(s) - fischer–tropsch process , product distribution , syngas , kinetics , chemistry , catalysis , dissociation (chemistry) , cobalt , kinetic energy , thermodynamics , analytical chemistry (journal) , chromatography , organic chemistry , physics , quantum mechanics , selectivity
A detailed kinetic model describing the consumption of key components and product distribution in the Fischer–Tropsch synthesis (FTS) over a 20%Co/0.5Re γ‐Al 2 O 3 commercial catalyst is developed. The developed model incorporates the H 2 O‐assisted CO dissociation mechanism developed by Rytter and Holmen and a novel approach to product distribution modeling. The model parameters are optimized against an experimental dataset comprising a range of process conditions: total pressure 2.0–2.2 MPa, temperature 210–230°C, CO conversion range of 10%–75% and feed with and without added water. The quality of the model fit measured in terms of mean absolute relative residuals (MARR) value is 23.1%, which is comparable to literature reported values. The developed model can accurately describe both positive and negative effects of water on the rate kinetics, the positive effect of water on the growth factor, temperature and syngas composition on the kinetics and product distribution over a wide range of process conditions, which is critical for the design and optimization of the Fisher–Tropsch reactors.