Screening Tool for Water-Free and Water-Lean Amine-Based Solvents for CO2 Capture

10 Pages Posted: 7 Apr 2021

See all articles by Ismail I.I. Alkhatib

Ismail I.I. Alkhatib

Research and Innovation Center on CO2 and H2 (RICH), and Chemical Engineering Department, Khalifa University

Mohammad Abu Zahra

Khalifa University

Lourdes F. Vega

Research and Innovation Center on CO2 and hydrogen (RICH Center). Khalifa University.

Date Written: March 3, 2021

Abstract

Owing to the high regeneration energy of conventional aqueous amines, water-free and water-lean solvents have emerged as potential alternatives for absorption CO2 capture processes. Given the wide array of possible solvents and required properties, rapid and reliable screening tools are required. Hence, this contribution is focused on demonstrating the capabilities of the soft-SAFT equation of state as a reliable thermodynamic model for the accurate representation of CO2 chemisorption in these novel solvents. Calculations of CO2 cyclic capacity and total energy of regeneration allow evaluating the performance of these solvents relative to their aqueous counterpart as a first screening tool. Results indicate that at the same conditions, transition the MEA-based solvent from aqueous, to water-lean, and finally to non-aqueous, lead to decreased cyclic capacity but also lower energy of regeneration.

Keywords: CO2 Absorption, screening tool, water-free solvents, water-lean solvents, soft-SAFT EoS

Suggested Citation

Alkhatib, Ismail I.I. and Abu Zahra, Mohammad and Vega, Lourdes F., Screening Tool for Water-Free and Water-Lean Amine-Based Solvents for CO2 Capture (March 3, 2021). Proceedings of the 15th Greenhouse Gas Control Technologies Conference 15-18 March 2021, Available at SSRN: https://ssrn.com/abstract=3819211 or http://dx.doi.org/10.2139/ssrn.3819211

Ismail I.I. Alkhatib

Research and Innovation Center on CO2 and H2 (RICH), and Chemical Engineering Department, Khalifa University ( email )

Abu Dhabi
United Arab Emirates

Mohammad Abu Zahra

Khalifa University ( email )

Abu Dhabi
United Arab Emirates

Lourdes F. Vega (Contact Author)

Research and Innovation Center on CO2 and hydrogen (RICH Center). Khalifa University. ( email )

Abu Dhabi
United Arab Emirates

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