Abstract
The knowledge of vapour-liquid equilibrium (VLE) and thermodynamic properties plays a pivotal role in the process development of absorption systems for acid gas capture in precombustion and postcombustion streams. A large number of thermodynamic modelling approaches for acid gas absorption in aqueous alkanolamine solutions are published in the literature. However, the reviews of these modelling techniques are limited and scattered. Moreover, poor guidelines exist for the selection of an appropriate modelling approach for the VLE prediction of the aforementioned system. Therefore, the current study presents a concise classification and review of classical thermodynamic models for acid gas absorption in aqueous alkanolamine solutions since their inception. The article systematically details the chronological development and highlights the major capabilities and limitations of classical thermodynamic approaches, namely, semiempirical models, activity coefficient models, and equation of state (and equation of state/excess Gibbs energy) models. A graphical comparison of VLE prediction by each classical approach is presented to form a general guideline in the selection of a suitable approach for process development studies. The review precisely discusses the issues, challenges, and future prospects of each classical thermodynamic approach in the context of application, complexity, and development.
About the authors
Humbul Suleman is presently pursuing his doctoral research at the Universiti Teknologi PETRONAS, Malaysia, and is working on the development of simple thermodynamic models for carbon dioxide-loaded aqueous alkanolamines. He has been teaching chemical engineering thermodynamics as a lecturer at the NFC Institute of Engineering and Fertilizer Research, Faisalabad, Pakistan, since 2009. He received his bachelor and master’s degrees from the same institute with distinction. He has six publications and five presentations to his credit.
Abdulhalim Shah Maulud is presently a senior lecturer in the Chemical Engineering Department at Universiti Teknologi PETRONAS, Malaysia. He received his PhD in Chemical Engineering from The University of Sydney, Australia, in 2007 and has research interests in process monitoring, modelling, and simulation systems. He is also a member of the CO2 management mission-oriented research at Universiti Teknologi PETRONAS and is actively involved in CO2 separation system research. He has 22 years of experience in the industry and academics and has a significant number of publications in peer-reviewed journals and conference proceedings.
Zakaria Man is presently an Associate Professor in the Department of Chemical Engineering at Universiti Teknologi PETRONAS, Malaysia, and possesses 25 years of experience with reputed academic institutions and research institutes throughout Malaysia. His research interests are membranes for CO2 separation, biopolymer, ionic liquid absorption, and thermodynamics of carbon capture. He has to his credit 150 international publications and presentations and 12 sponsored and industrial projects. He is currently a reviewer for various national and international journals.
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