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Effects of the most important influencing parameters on the methane gas hydrate formation kinetics at the onset of hydrate formation in the absence or presence of sodium dodecyl sulfate (SDS) kinetic promoter are investigated. At the SDS concentration of 500 ppm, the maximum methane effective diffusion coefficient and the highest conversion rate are obtained. The methane hydrate-liquid interfacial tension according to the suggested mechanism is about 18.6 mJm -2 for all cases. The overall average absolute deviations between predicted and measured methane consumption rates are about 0.71% and 0.83% regarding nonpromoted and SDS-promoted gas hydrate formation processes, respectively.

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