Hydrate formation is one of the most actual problems in modern gas industry. Gas hydrates are crystalline water-based solids physically resembling ice, in which small non-polar molecules or polar molecules with large hydrophobic moieties are trapped inside "cages" of hydrogen bonded water molecules. In other words, gas hydrates are clathrate compounds in which the host molecule is water and the guest molecule is typically gas or liquid.

Existing and applied models of hydrate formation, as a rule, do not take into account the variety of design features of gas pipelines and the heat exchange between the gas and the environment in the real pipeline constructions. In concordance with foregoing the work held: investigation of the formation process and dissociation of the gas hydrates with due regard for the heat exchange between the gas and the environment and, also, development of the quasionedimensional models of the flow and the heat exchange of the multicomponent medium. The last model analyzes some conditions which could provide us with the hydrate thin-shelled layer instead of spontaneous clathrate formation with further plugging.

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