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Modelling Vapour − Liquid Equilibrium of CO 2 in Aqueous N‐Methyldiethanolamine through the Simulated Annealing Algorithm
Author(s) -
Kundu Madhusree,
Bandyopadhyay Syamalendu S.
Publication year - 2005
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450830222
Subject(s) - aqueous solution , thermodynamics , chemistry , solubility , vapor–liquid equilibrium , simulated annealing , chromatography , physics , mathematics , algorithm
The modified Clegg‐Pitzer equation is used to correlate and predict the vapor‐liquid equilibrium of the CO 2 ‐MDEA‐H 2 O system. Simulated annealing (SA), a computational stochastic technique for finding near global minimum solutions to optimization problems, has been used for parameter estimation in the model to predict VLE of CO 2 in aqueous MDEA solution. The solubility of CO 2 in aqueous solutions of 23.8 wt % and 30.0 wt % of N‐methyldiethanolamine (MDEA) has been measured over the temperature range of 303‐323 K and CO 2 partial pressure range of 1 to 100 kPa. The model predicted equilibria have been found to be in good agreement with the experimental results of VLE measurement of this work as well as those in the open literature. In this work, the SA technique has been used as an alternative to the traditional Levenberg‐Marquardt (LM) technique, to predict the VLE data accurately.