Effect of the Promoter on Gas Hydrate Formation and Dissociation

Abstract

In this study, ethane hydrates were produced in the presence of a surfactant to investigate the effect of a surfactant on hydrate formation and dissociation. The hydrate formation rate increases with the surfactant concentration above the critical micelle concentration. The gas storage capacities in the presence of a surfactant were calculated at the system pressure and temperature. The dissociation behaviors of hydrates were also studied. The dissociation of hydrates increases with the surfactant concentration under similar operating pressure and temperature.

Study on methane hydrate formation in gas–water systems with a new compound promoter

“…It is supposed that aer adding a smaller amount of the promoter, the gas molecules can be surrounded by the hydrophobic group of the promoter. 42 As shown in Fig. 18, with the function of the hydrophilic group, the micelles (one-layer structure) are uniformly distributed in the aqueous phase, which promotes the dissolution of the gas into the liquid phase.…”

Investigation on the roles of activated carbon particle sizes on methane hydrate formation and dissociation

“…In recent years, natural gas hydrates have gained much attention not only as a new source of natural gas but also as a means for novel applications like carbon dioxide capture, hydrogen storage and natural gas storage and transportation (Ding et al, 2013;Englezos and Lee, 2005;Fan et al, 2014;Kang and Lee, 2000;Kim et al, 2011;Li et al, 2010;Linga et al, 2007;Mandal and Laik, 2008;Sloan, 2003;Veluswamy et al, 2014). Natural gas hydrates, mainly methane, contain highly concentrated methane gas.…”

“…They reported that the methane hydrate formation rate and storage capacity were increased effectively, but the stability of the hydrate decreased. The effects of SDS on ethane hydrate were also studied by Mandal and Laik (2008). They demonstrated that the presence of SDS increased the gas consumption and affected the hydrate formation.…”

Effect of imidazolium based ionic liquids and ethylene glycol monoethyl ether solutions on the kinetic of methane hydrate formation

“…Using enough amounts of kinetic or thermodynamic promoters, the mass transfer between gas and water is intensified so that the hydrate formation rate is enhanced [19]. Several researchers have presented that the hydrate formation rate is enhanced effectively through using promoters [14,15,21,23,24,33,35,36,42,43,50,51].…”