CO₂ absorption from simulated flue gas in a bubble column

ABSTRACT

Carbon dioxide (CO₂) absorption from power plant generated flue gas is investigated for CO₂ emissions reduction. Amino acid alkaline solvents have the potential to reduce the energy required for solvent regeneration. This project is focused on CO₂ absorption by amino acid alkaline solvents in a bubble column. Important parameters characterizing the reactor, e.g., bubble size, liquid-phase dispersion coefficient, and gas holdup, are experimentally determined. A theoretical model based upon transient mass and energy balances for the chemical species involved is presented. Simulation results are compared to experimental data. The model can be used to predict, optimize, and control CO₂ absorption in industrial-scale applications.

KEYWORDS:

• CO₂ absorption
• CO₂ capture
• amino acid alkaline solvents
• bubble column

Acknowledgments

This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).

Additional information

Funding

Funding for this research was provided by the Office of Technology Transitions of the U.S. Department of Energy, under Technology Commercialization Fund [Grant # TCF-17-13299].