| 초록 |
Surfur hexafluoride (SF6) has been widely used in a variety of industrial processes, but it is one of the most potent greenhouse gases global climate changes.For this reason, it is necessary to separate or collect it from waste gas streams.One separation method is through hydrate crystal formation.In this study, SF6 hydrate was formed in aqueoussurfactantsolutions of 0.00, 0.01, 0.05, 0.15 and 0.20 wt.% to investigate the effects of the surfactant on the hydrate formation rates.The surfactant, sodium dodecyl sulfate (SDS), was tested in a semi-batch stirred vessel at the constant temperature and pressures of 276.2 K and 0.78 MPa, respectively.This surfactant showed kinetic promoter behavior for SF6 hydrate formation.It was also found that SF6 hydrate formation proceeded in two stages with the second stage being the most rapid. In-situ Raman spectroscopy analysis revealed that the increased gas consumption rate with the addition of surfactant was possibly due to the increased gas filling rate in the hydrate cavity. |
