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Title:Modeling, Design, and Testing of a Novel Biphasic Solvent-Enabled Absorption System for Post-Combustion Carbon Capture
Author(s):Nielsen, Paul; Salih, Hafiz; Lu, Hong; Ye, Qing; OBrien, Kevin C; Brownstein, Stephanie; Atalla, Mohamed; Lu, Yongqi
Subject(s):Carbon capture
Biphasic solvents
Abstract:A novel absorption process enabled by a new class of biphasic solvents for post-combustion carbon capture (BiCAP) is presently being developed at the University of Illinois at Urbana-Champaign. The new biphasic solvents are water-lean solvent blends that develop dual liquid phases with the absorbed CO2 highly enriched in one of the phases. These solvents are superior in CO2 capacity and have high thermal and oxidative stability compared to MEA. The BiCAP technology features a unique process configuration of multi-stage CO2 absorption and liquid–liquid phase separation during CO2 absorption, allowing continual separation and removal of the CO2-enriched liquid phase for maintaining low solvent viscosity and a fast absorption rate. A 40 kWe-scale skid has recently been constructed at the Abbott Power Plant in Champaign, IL, to test the BiCAP solvent in continuous operation with a slipstream of real post-combustion flue gas. Along with improvements in the stripping configuration including cold feed bypass, the process is expected to achieve a minimum reboiler duty of 2,210 kJ/kg CO2 captured at a stripper operating pressure of 6 bar.
Issue Date:2021-02-08
Series/Report:Proceedings of the 15th Greenhouse Gas Control Technologies Conference 15-18 March 2021
Development and Bench-Scale Testing of a Novel Biphasic Solvent-Enabled Absorption Process for Post-Combustion Carbon Capture
Genre:Conference Paper / Presentation
Sponsor:U.S. Department of Energy ; FE0031600
Date Available in IDEALS:2022-02-23

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