Chemical Affinity Modeling of Methane Hydrate Formation and Dissociation in the Presence of Surfactants

TLDR: In this paper, the authors investigated the storage capacity and formation rate of methane hydrate with the addition of surfactants in aqueous phase during hydrate formation and dissociation.

Abstract: Methane hydrate formation, dissociation and its kinetics after addition of Sodium Dodecyl Benzene Sulfonate (SDBS), Cetyl-Tri-methyl Ammonium Bromide (CTAB) and Tergitol in aqueous phase have been investigated experimentally along with the storage capacity. The experiments were carried out with surfactant concentrations varying between 0 and 10000 ppm in the aqueous phase. Nucleation temperature, pressure, dissociation temperature and point, pressure drops, formation rate and storage capacity were significantly varied following by the addition of surfactants in aqueous phase during hydrate formation and dissociation. Maximum sub-cooling was required for the nucleation after addition of 5000 ppm of SDBS. Hydrate formation rate and rate constants has been found to increase with the addition of surfactants, while the same gets reduced with time. Formation rate increases 443 folds after addition of 10000 ppm SDBS in aqueous phase. Maximum storage capacity occurred at 1000 ppm of SDBS in aqueous phase and then...