CO<sub>2</sub> water-lean capture

Author(s): Ulderico Di Caprio, Emine Kayahan, Min Wu, Peter Hellinckx, Tom Van Gerven, Steffen Waldherr, M. Enis Leblebici
Abstract: The most mature post-combustion capture technology is absorption of CO₂ into monoethanolamine (MEA). Typically, this process utilizes a solution of 30wt.% aqueous MEA as absorbent liquid; however, recent studies showed how increasing MEA concentration enhances mass-transfer coefficient in absorption columns. This work investigates effect of MEA concentration on the overall process. The main focus is given to regeneration heat. Heat duty at the reboiler per unit of recovered CO₂ (HDUC) is utilized as the primary performance indicator. The analysis employs an Aspen HYSYS® model. Increasing MEA concentration reduces HDUC by 74% when MEA concentration goes from 30wt.% to 90wt.%. Another parameter affecting HDUC is stoichiometric ratio between moles of MEA and CO₂. Halving molar ratio between MEA and CO₂, at 30 wt.% MEA concentration returns a reduction in HDUC of 48%, while at 90wt.% MEA concentration, the observed reduction is 9%. Overall, increasing MEA concentration improves process efficiency.
Organisation(s): Functional and Evolutionary Ecology
External organisation(s): Katholieke Universiteit Leuven, University of Antwerp
Journal: Computer Aided Chemical Engineering
Pages: 3283-3288
No. of pages: 6
ISSN: 1570-7946
DOI: https://doi.org/10.1016/B978-0-443-15274-0.50523-0
Publication date: 01-2023
Peer reviewed: Yes
Austrian Fields of Science 2012: 204003 Chemical process engineering
Keywords
ASJC Scopus subject areas: Chemical Engineering(all), Computer Science Applications
Portal url: https://ucris.univie.ac.at/portal/en/publications/co2-waterlean-capture(e486ede8-e478-464a-b9dd-62b2c89a9291).html