Mixed hydrates of methane and water‐soluble hydrocarbons modeling of empirical results

Equilibrium conditions for clathrate hydrates formed from carbon dioxide or ethane in the presence of aqueous solutions of 1,4-dioxane and 1,3-dioxolane

“…Jager et al [12] determined methane hydrate equilibria in the presence of different concentrations of aqueous 1,4-dioxane solutions and found that 1,4-dioxane reduced the equilibrium pressure of hydrate formation in solution at concentrations of up to 0.06 mol fraction. de Deugd et al [13] obtained similar results for methane hydrate formation in the presence of aqueous 1,3-dioxolane solutions. The results of these experiments and of thermodynamic modeling indicated that structure II hydrates could form from methane and aqueous solutions of 1,4-dioxane or 1,3-dioxolane.…”

Large pressure depression of methane hydrate by adding 1,1-dimethylcyclohexane

“…tetrahydrofuran (de Deugd et al, 2001;Seo et al, 2001), acetone (Ng and Robinson, 1996;Mainusch et al, 1997;de Deugd et al, 2001;Seo et al, 2001), and 1,4-dioxane (Jager et al, 1999;Seo et al, 2001), generate the structure-II hydrate crystal in the presence of methane and reduce the equilibrium pressure. These additives are, however, unsuitable for our practical object because they are perfectly soluble in water.…”

Influence of cationic and non-ionic surfactants on the kinetics of mixed hydrogen/tetrahydrofuran hydrates

“…de Deugd et al (2001) had reported the hydrate equilibrium data for methane/THF(5 mol%)/water system. 5 mol% THF was close to the stoichiometric THF composition and equilibrium pressure at 293.2 K was 2.05 MPa close to equilibrium pressure of the present study.…”