In the permafrost region and ocean bottom where gas hydrates are formed in the form of nodules mound etc, it mixes up with the clay and other substances at subsea soil. Naturally its property gets changed during formation as well as dissociation. Therefore the present study aims at studying the effect of extraneous material like Bentonite with different composition and surfactant on formation and dissociation of gas hydrates. Extensive observation of pressure temperature equilibrium during formation and decomposition of methane hydrate under different conditions have been made. The effect of bentonite and anionic surfactant sodium dodecyl sulphate (SDS) on the rate of hydrate formation is thoroughly investigated in this work. Three different concentrations (3%, 5%, and 10%) of bentonite are tested followed by three different concentration of SDS (300 ppm, 500 ppm, 1000 ppm) in unique concentration of 5% bentonite. For comparison purpose, the formation and dissociation of pure water has been also conducted. All the experiments are started with same pressure i.e. 440.2 psi. It has been found that addition of Bentonite inhibit the hydrate formation as compared to water, however SDS speed up the hydrate formation effectively.

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