Insightful analysis of physical properties, kinetics, absorption capacity, and regeneration heat duty of monoethanolamine and N-methyl-4-piperidinol blended solvent in post-combustion carbon capture
Issued Date
2024-01-01
Resource Type
ISSN
09441344
eISSN
16147499
Scopus ID
2-s2.0-85201670393
Journal Title
Environmental Science and Pollution Research
Rights Holder(s)
SCOPUS
Bibliographic Citation
Environmental Science and Pollution Research (2024)
Suggested Citation
Apaiyakul R., Khuenkaew W., Sirirathomsud O., Boonprasop S., Liu H., Gao H., Liang Z., Tontiwachwuthikul P., Sema T. Insightful analysis of physical properties, kinetics, absorption capacity, and regeneration heat duty of monoethanolamine and N-methyl-4-piperidinol blended solvent in post-combustion carbon capture. Environmental Science and Pollution Research (2024). doi:10.1007/s11356-024-34606-x Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/100624
Title
Insightful analysis of physical properties, kinetics, absorption capacity, and regeneration heat duty of monoethanolamine and N-methyl-4-piperidinol blended solvent in post-combustion carbon capture
Corresponding Author(s)
Other Contributor(s)
Abstract
In this study, the high potential tertiary N-methyl-4-piperidinol or MPDL (0.25–1.00 M) was blended with 5 M monoethanolamine (MEA) to formulate 5.25–6.00 M MEA-MPDL solvent and compare with the benchmark 5 M MEA. It was found that the density and the Henry’s constant slightly decreased, while the viscosity increased as the MPDL concentration in the blend increased. Even though the equilibrium CO2-loaded viscosity considerably increased (by 34.3–40.2%) as the MPDL content increased, it was still in a great operating region of less than 10 mPa.s. Experimental overall reaction kinetics constant (kov) was well corresponding with the zwitterion mechanism of MEA and the base-catalyze hydration mechanism of MPDL based absorption kinetics model, with %AAD of 0.56%. Interestingly, an addition of MPDL into 5 M MEA slightly enhanced kov (1.2–3.3% increment) and considerably favored absorption capacity (13–31% elevation), and regeneration heat duty (28–47% reduction), respecting 5 M MEA. The proposed strategic blending can maintain the overall solvent reactivity at the same level of the benchmark, while obviously increase the absorption capacity and largely reduce the regeneration heat duty. This highly favors a solvent upgrading for the existing 5 M MEA based CO2 capture plant. According to the recent data, 5 M MEA + 1.00 M MPDL was suggested. Since the blend was formulated at high concentration, its corrosiveness should also be considered. Graphical abstract: (Figure presented.).