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A nonequilibrium model for dynamic simulation of tray distillation columns
Author(s) -
Kooijman Hendrik A.,
Taylor Ross
Publication year - 1995
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.690410804
Subject(s) - tray , distillation , non equilibrium thermodynamics , thermodynamics , fractionating column , process engineering , computer science , chemistry , materials science , chromatography , engineering , mechanical engineering , physics
A nonequilibrium model for the dynamic simulation of distillation columns is described. The nonequilibrium model includes the direct calculation of the rates of mass and energy transfer and is better able to model the actual physical processes occurring on a real distillation tray than is the conventional equilibrium stage model. Example calculations show that heat‐transfer limitations and the vapor holdup above the froth cannot be neglected at elevated pressures. Back‐computed Murphree tray efficiencies are not constant over time, which implies that the equilibrium model should not be used for dynamic simulations.