This paper reports experimental values of the surface tension between CO<inf>2</inf> gas and tetra-n-butylammonium bromide (TBAB) aqueous solution measured by the pendant drop method. The experimental conditions were pressures from 1.00 MPa to 4.00 MPa, temperatures from 288.15 K to 303.15 K and w<inf>TBAB</inf> from 0.10 to 0.40, where w<inf>TBAB</inf> denotes the mass fraction of TBAB in the aqueous solution. These pressure-temperature-composition conditions partially fall into the stability zone of (CO<inf>2</inf> + TBAB) semiclathrate hydrate but all data were obtained without any hydrate in the system. Surface tension decreased with increasing w<inf>TBAB</inf> and pressure but temperature dependency was not observed. Compared to the air-TBAB aqueous solution system and CO<inf>2</inf>-water system, the values of the surface tension were smaller.
- Clathrate hydrate
- Surface tension
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Atomic and Molecular Physics, and Optics
- Materials Science(all)