Physical modeling of the formation of clathrate hydrates of methane

Abstract

Nowadays natural gas hydrates attract special attention as a possible source of fossil fuel. According to various estimates, the reserves of hydrocarbons in hydrates exceed considerably explored reserves of natural gas. Due to the clathrate structure the unit volume of the gas hydrate can contain up to 160-180 volumes of pure gas. In recent years interest to a problem of gas hydrates has considerably increased. Such changes are connected with the progress in searches of the alternative sources of hydrocarbonic raw materials in countries that do not possess the resources of energy carriers. Thus gas hydrates are nonconventional sources of the hydrocarbonic raw materials which can be developed in the near future. At the same time, mechanisms of methane clathrate hydrates formations have not reached an advanced level, their thermophysical and mechanical properties have not been investigated profoundly. Thereby our experimental modeling of the processes of formation of methane clathrate hydrates in water cryomatrix prepared by co-condensation from the gas phase onto a cooled substrate was carried out over the range of condensation temperatures 12-60 K and pressures 10 -4 -10 -6 Torr. In our experiments the concentration of methane in water varied in the range of 5-90%. The thickness deposited films was 30-60 μm.

Optical Studies of Thin Films of Cryocondensed Mixtures of Water and Admixture of Nitrogen and Argon

“…Dangling bonds in IR spectra near 3700 cm −1 are a source of information about the structural properties of amorphous water ice and especially icy mixtures of water and other frozen gases. A similar spectral effect was found by our authors in a series of other experiments conducted at the Laboratory of Cryophysics and Cryotechnology at Al-Farabi Kazakh National University for various concentrations of mixtures of water with nitrogen, methane, ethanol, CO 2 , or CCl 4 [ 25 , 26 , 27 , 28 , 29 ].…”

Infrared Analysis and Effect of Nitrogen and Nitrous Oxide on the Glass Transition of Methanol Cryofilms

“…A similar spectral effect was found by our authors in a series of other experiments conducted at the Laboratory of Cryophysics and Cryotechnology at Al-Farabi Kazakh National University for various concentrations of mixtures of water with nitrogen, methane, ethanol, CO 2 , or CCl 4 . ,− …”

Zeolitic ice: A route toward net zero emissions

“…In that context, cages can be utilized for safe energy storage. With a volumetric capacity of methane that can reach about 160-180 V/V [39,40], they can also be used to store and transport other gases of economic interest such as CO 2 , N 2 and H 2 in economically feasible P-T conditions is one of the highly promising areas [41]. CH 4 -CO 2 replacement in the enormous methane hydrate reservoirs is another important application that became the focus of recent research studies [42].…”