The role of Tween 80 and SDS in the kinetics of semi-clathrate hydrates formation for carbon dioxide capture from flue gas

ABSTRACT

The present study focuses on integrated experimental evaluation of a concentration effect in nonionic and anionic surfactants on semi-clathrate hydrates formation during the capture low-pressure carbon dioxide from the flue gas (N₂ (83.13 mol.%)/CO₂ (16.87 mol.%)). Semi-clathrate hydrates of tetra n-butylammonium bromide (TBAB) are favorable materials with phase changes due to their moderate hydrate formation conditions. The kinetics of CO₂-N₂-TBAB semi-clathrate hydrate formation was studied in the presence and absence of Tween-80 as a nonionic surfactant and sodium dodecyl sulfate (SDS) as an anionic one. The experiments were performed in a stirred batch reactor at a constant temperature of 273.55 K and an initial pressure of 2.1 MPa. 5.0 wt.% TBAB’s aqueous solutions were tested both in the absence of surfactants and in presence of Tween-80 and SDS at different concentrations (500, 1500, 3000 ppm). The separation factor and recovery for CO₂ at low pressure were in situ controlled depending on the surfactant concentration. Adding 1500 ppm of Tween-80 provided optimal conditions for the СО₂/N₂ separation process; the separation factor was 9.5, the СО₂ recovery was 53.1%.

KEYWORDS:

• CO₂
• TBAB
• SDS
• Tween-80
• semi-clathrate hydrates

Highlights

• The effect of Tween-80 and SDS on the kinetics of CO₂-N₂-TBAB semi-clathrate hydrate formation.

• The CO₂ recovery kinetics and the separation factor of CO₂-N₂-TBAB semi-clathrate hydrate were studied.

Tween-80 promoter is superior to the SDS in the capture of CO₂ from CO₂-N₂-TBAB.

Acknowledgements

The main part and findings of the reported study were funded by the Russian Foundation for Basic Research under number 20-38-70035. The additional study devoted to the measurement of combined systems mass transfer properties was financially supported by the Ministry of Science and Higher Education of the Russian Federation as part of the scientific project the Laboratory of Smart Materials and Technologies (LSMT) project number 075-03-2021-113/4.

Disclosure statement

No potential conflict of interest was reported by the author(s).

CRediT author statement

Petukhov Anton: Funding acquisition, Project administration, Resources, Investigation, Validation, Writing - Review & Editing. Atlaskin Artem: Investigation, Writing - Review & Editing. Sergeeva Maria: Formal analysis. Kryuchkov Sergey: Investigation. Shablykin Dmitry: Investigation. Trubyanov Maxim: Software. Smorodin Kirill: Investigation. Zarubin Dmitriy: Formal analysis. Atlaskina Maria: Formal analysis. Petukhova Anastasia: Investigation, Writing - Review & Editing. Vorotyntsev Andrey: Data Curation. Vorotyntsev Ilya: Visualization, Supervision.

Additional information

Funding

This work was supported by The Russian Foundation for Basic Research [20-38-70035]; the Ministry of Science and Higher Education of the Russian Federation [075-03-2021-113/4].