eprintid: 15238
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/01/52/38
datestamp: 2023-11-10 03:29:51
lastmod: 2023-11-10 03:29:51
status_changed: 2023-11-10 01:58:59
type: article
metadata_visibility: show
creators_name: Suleman, H.
creators_name: Maulud, A.S.
creators_name: Fosbøl, P.L.
creators_name: Nasir, Q.
creators_name: Nasir, R.
creators_name: Shahid, M.Z.
creators_name: Nawaz, M.
creators_name: Abunowara, M.
title: A review of semi-empirical equilibrium models for CO2-alkanolamine-H2O solutions and their mixtures at high pressure
ispublished: pub
keywords: Alkanolamines; Equilibrium constants; Ethanolamines; High pressure effects, Carbon dioxide
note: cited By 15
abstract: The knowledge of vapour-liquid equilibrium (VLE) of the carbon dioxide-alkanolamine-water system at high pressure plays a critical role in the design of natural gas sweetening systems. Semi-empirical thermodynamic models have been widely used to estimate the VLE at high pressure. However, the understanding of their correlation behaviour at high pressure is limited. Therefore, this study reviews the chronological development and analyse the performance of the two types of semi-empirical equilibrium models for the high pressure-high gas loadings. The effect of process parameters is first analysed on a theoretical basis and then modelled with use of correction factors, defining the systematic contribution of different parameters used in such models. The analysis shows that their VLE require small corrections for good correlation at high pressure, if the equilibrium constants are well-determined. Therefore, the study reports both reliable and improved values of equilibrium constants for alkanolamines, where applicable. In addition, the combined equilibrium constant based semi-empirical models are modified for estimating high pressure VLE of the said system, which were previously limited to low pressure equilibria and low loadings only. The study presents a comprehensive review of the semi-empirical equilibrium models, highlighting their key issues, challenges and future recommendations. © 2020 Elsevier Ltd.
date: 2021
publisher: Elsevier Ltd
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097595927&doi=10.1016%2fj.jece.2020.104713&partnerID=40&md5=49c60637d4078af572d0247836d04282
id_number: 10.1016/j.jece.2020.104713
full_text_status: none
publication: Journal of Environmental Chemical Engineering
volume: 9
number: 1
refereed: TRUE
issn: 22133437
citation:   Suleman, H. and Maulud, A.S. and Fosbøl, P.L. and Nasir, Q. and Nasir, R. and Shahid, M.Z. and Nawaz, M. and Abunowara, M.  (2021) A review of semi-empirical equilibrium models for CO2-alkanolamine-H2O solutions and their mixtures at high pressure.  Journal of Environmental Chemical Engineering, 9 (1).   ISSN 22133437