Hydrate phase equilibria of CO2 + N2 + aqueous solution of THF, TBAB or TBAF system

• Hydrate dissociation conditions of CO2 (15 mol%) + N2 (85 mol%) are reported.
• Aqueous solutions contain THF, TBAB or TBAF.
• An isochoric pressure search method was used to perform the measurements.
• The obtained dissociation data are compared with selected data from the literature.

We report hydrate dissociation conditions of CO2 (15 and 30 mol%) + N2 (85 and 70 mol%) in the presence of aqueous solutions of THF, TBAB or TBAF. The concentrations of TBAB and TBAF in the aqueous solutions are 5 wt% and 9 wt% while THF concentration in aqueous solution is 3 mol%. Two different experimental techniques including isochoric pressure search method and a DSC method are used to measure the hydrate dissociation conditions. A comparison is finally made with the literature data. It is expected that this study provides better understanding of hydrate phase equilibria associated with CO2 capture.