Measurement and prediction of phase equilibria for water+CO2 in hydrate forming conditions

The Abundance of Atmospheric CO2 in Ocean Exoplanets: a Novel CO2 Deposition Mechanism

“…Therefore, the solubility of carbon dioxide in liquid water in equilibrium with its clathrate (eq.13) should be a weak function of pressure. This is corroborated by several experimental works (e.g., Servio & Englezos 2001;Yang et al 2000;Aya et al 1997;Zatsepina & Buffett 2001;Kim et al 2008). …”

Sorption equilibria of CO2/CH4 mixture on activated carbon in presence of water

“…The higher formation pressure of methane hydrates in porous media was observed in previous studies [23,24] and it was attributed to the diffusion resistance. The inflection pressure of carbon dioxide is at about 1.3 MPa, which is very close to the formation pressure of hydrates in pure water [3]. The large solubility of CO 2 in water might reduce the diffusion resistance and, thus, reduces the difference between the hydrate formation pressures in porous media or in pure water.…”

“…Therefore, how to trap and sequestrate CO 2 received considerable research interests. A suggestion is to sequestrate CO 2 deep in the sea as hydrates [2,3], or to sequestrate CO 2 in conjunction with the exploration of flammable ice [4]. Flammable ice is discovered in permafrost or deep-ocean, and the total resource of methane concealed in it is about 20 million trillion cubic meters [5].…”

CO2 and CH4 mole fraction measurements during hydrate growth in a semi-batch stirred tank reactor and its significance to kinetic modeling

“…Kluytmans et al [10] also concluded that the presence of particles in a system could readily increase the dissolution rate at the vapor-liquid water interface by creating turbulence and reducing the effective boundary layer thickness, which would increase the mass transfer coefficient. Even though several authors have measured the solubility of carbon dioxide [11,12,13] and methane [14,15,16,17,18] in the liquid phase under hydrate-liquid water equilibrium, to the best of our knowledge, there is no experimental data regarding the mole fraction of the gas hydrate former in the bulk liquid phase at the onset of hydrate growth and thereafter. The work of Teng and Yamasaki [19] is the only reference to solubility measurements approximating the solubility of carbon dioxide in the metastable absence of hydrates, as reported by Ohmura and Mori [20].…”