A hybrid equation of state and Kent-Eisenberg model for accurate prediction of carbon dioxide separation by aqueous alkanolamines

• Main Authors: Suleman, H., Maulud, A.S., Man, Z.
• Format: Article
• Published: Taylor and Francis Inc. 2016
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84987851786&doi=10.1080%2f01496395.2016.1217241&partnerID=40&md5=f89bc8812cea5f40e3c66e780e9ff694; http://eprints.utp.edu.my/30685/

A hybrid predictive model has been developed for accurate prediction of thermodynamics of carbon dioxide separation by aqueous alkanolamines. The model incorporates equation of state/excess Gibbs energy model into Kent�Eisenberg approach to predict carbon dioxide�alkanolamine�water equilibria. The approach imparts theoretical corrections to Kent�Eisenberg approach and significantly extends their range of application for monoethanolamine, diethanolamine, methyldiethanolamine, and 2-amino-2-methyl-1-propanol solutions. The proposed model suitably predicts thermodynamics of carbon dioxide separation, well beyond the regressed range of parameters. The results are in excellent agreement with experimental data for a wide range of process parameters and found superior to existing thermodynamic approaches. © 2016 Taylor & Francis.