Liquid–liquid equilibrium in ternary systems N,N-dimethylformamide + 2-methylpentane + methanol and N,N-dimethylformamide + methylcyclohexane + methanol

Determination and correlation of liquid–liquid equilibria for four binary N,N-dimethylformamide+hydrocarbon systems

“…The UCSTs determined in this study are marked with the symbol ⊗ in each figure. These Table 1 Experimental cloud point data for the system DMF (1) + hexane (2) Table 2 Experimental cloud point data for the system DMF (1) + heptane (2) UCSTs were interpolated from the experimental cloud points near the UCST in the same manner as described in previous papers [9][10][11]. For these mixtures, Lobos et al measured the cloud points in the vicinity of the UCST in detail according to visual determination.…”

“…In the NRTL equation, a constant value of 0.4 was adopted for the non-randomness parameter α 12 , because this should give a more linear relation for binary interaction parameters g ij − g jj [10,11]. In the T-K-Wilson equation, the value of the liquid molar volume, v L i , was calculated by means of the modified Rackett equation [37]:…”

“…Therefore accurate phase equilibria data for DMF + alkane are essential for efficient design and extractive process development. The thermodynamic properties of mixtures containing DMF have been measured by several authors [11][12][13][14][15][16][17][18][19][20]. Further, Ruiz et al [21] examined a simulation for the extractive distillation of mixtures containing aromatic and saturated hydrocarbons with DMF.…”

Capillary controls on methane hydrate distribution and fracturing in advective systems

“…However, at the pore scale, sediment physical properties exert a strong influence on hydrate formation and distribution . Many investigations have focused on the nature of these influences theoretically [e.g., Clennell et al, 1999;Henry et al, 1999;Turner et al, 2005;Sun and Mohanty, 2006;Anderson et al, 2009;Jain and Juanes, 2009;Kvamme et al, 2009] and in the laboratory [e.g., Handa and Stupin, 1992;Uchida et al, 1999;Tohidi et al, 2001;Uchida et al, 2002;Anderson et al, 2003aAnderson et al, , 2003bUchida et al, 2004;Hyodo et al, 2005;Lee et al, 2007;Yun et al, 2007;Lee et al, 2008;Masui et al, 2008]. [3] Sediment physical properties can influence hydrate distribution by influencing fluid flow pathways, which affects methane supply, and by changing the local conditions for hydrate stability.…”