Enhanced growth of methane–propane clathrate hydrate crystals with sodium dodecyl sulfate, sodium tetradecyl sulfate, and sodium hexadecyl sulfate surfactants

Methane hydrate formation with surfactants fixed on the surface of polystyrene nanospheres

“…While with SDS as a promoter, hydrates did not form at the gas/liquid interface as dendritic crystals, but on the reactor wall and then grew upwards along the reactor wall and radially along the gas/liquid interface. 13 Mori et al 4,5 also reported that the hydrates could grow upwards on the reactor wall under the capillary effect and nally accumulated as a highly porous hydrate layer in the upper part of the reactor, which resulted in rapid hydrate formation. However, this might also lead to the hydrates existing in the reactor with a low apparent density.…”

Influence of cationic and non-ionic surfactants on the kinetics of mixed hydrogen/tetrahydrofuran hydrates

“…Surfactants when used at low concentrations act as "kinetic promoters" as they improve the kinetics of hydrate formation. Surfactants are also known to change the morphology of hydrate crystal formation (Lim et al, 2013;Yoslim et al, 2010;Zhong and Rogers, 2000). Our previous study showed the superior performance of sodium dodecyl sulfate surfactant in improving the kinetics of mixed hydrogen/propane hydrates with distinct two stage growth steps when used in concentrations of 0.0005-0.1 wt% .…”

A new approach for determination of single component gas hydrate formation kinetics in the absence or presence of kinetic promoters

“…Link et al (2003) have measured the methane hydrate formation rate in the presence of sodium dodecyl sulfate (SDS) dodecyl trimethyl ammonium chloride (DTAC), dodecylamine, dodecylamine hydrochloride (DAH) and found that SDS could allow the gas content of methane hydrate to reach 97% of the theoretical maximum value. Yoslim et al (2010) have investigated the kinetics of methane-propane clathrate hydrate crystals with sodium dodecyl sulfate, sodium tetradecyl sulfate, and sodium hexadecyl sulfate surfactants and found that sodium dodecyl sulfate (SDS) as an anionic surfactant was one of the most appropriate surfactant for increasing the hydrate formation rate.…”