Influence of size and shape effects on the high-pressure solubility of n-alkanes: Experimental data, correlation and prediction

Phase diagrams of binary systems containing n-alkanes, or cyclohexane, or 1-alkanols and 2,3-pentanedione at atmospheric and high pressure

“…A simple piston-cylinder device, presented in detail in our previous papers [3,4] was used. The mobile piston was moved by a hydraulic press.…”

“…The initiation of freezing was noticed at a higher pressure than the equilibrium value of this phase transition, observed as an "overpressure" effect (the intersection between the lines of the one-and twophase regions). The equilibrium point was the first from the solid phase line (see our previous work [3,4]). The results published are the average of three or more measurements at the intersection point.…”

“…(1) with an additional term for the second solid-solid phase transition (data in Table 8). The solubility equation for temperatures below that of the phase transition must include the effect of the transition [3][4][5][6].…”

Liquid-Solid Phase Equilibria of Paraffinic Systems by DSC Measurements

“…The studies about the effect of solvent on solubility of waxes reported in literature [1] have shown that waxes do not exhibit ideal solution behavior when crystallizing and that their solubility in a solvent increases as both the solvent molecular size and solvent solubility parameter decrease. The influence of the shape and size of the solvent on solute-solvent interaction and on the n-alkanes solubility has been also described in literature, hence it has been reported that globular or spherical solvents destroy the conformational order in liquid long-chain hydrocarbons [28,37]. Aromatic solvents have been reported as a help in both inhibiting wax crystal formation and decreasing the amount of the wax deposited [38].…”

“…They are necessary for high-pressure polymerization processes and for the design of oil-recovery processes. Besides its importance for technological processes such as crystallization and purification at high pressure, phase equilibrium properties provides a good tool for examining the thermodynamic nature of many systems [11].Recently, the use of phase change material (PCM) thermal energy storage has gained considerable attention because of its high storage density (amount of energy stored per unit mass), and a narrow temperature range for charging and discharging the storage. Paraffin waxes have been used as PCM for many applications because of their advantageous thermal performances and phase behavior [12].…”