Vapour-liquid equilibrium for tripropylene glycol + aromatic hydrocarbons binary systems: Measurements and modelling

Thermophysical Properties of Mixtures of 2-Ethylhexanoic Acid and p-Xylene

“…The parameters A i , B i , and C i were taken from refs 14 and 12, where they were obtained from a fit to literature data. 25,26 The activity coefficients γ i were modeled using the non-random twoliquid (NRTL) model: 27…”

“…The VLE were modeled based on the extended Raoult’s law assuming the gas phase to be ideal and neglecting the pressure dependence of the chemical potential in the liquid phase: p i normals x i γ i = p y i Therein, p i s is the vapor pressure of pure component i , x i is the liquid phase mole fraction of component i , γ i is the activity coefficient of component i , p is the pressure, and y i is the gas phase mole fraction of component i . The pure component vapor pressures p i s were described by an Antoine-type equation: ln ( p i s / normalk normalP normala ) = A i + B i T / normalK + C i The parameters A i , B i , and C i were taken from refs and , where they were obtained from a fit to literature data. , The activity coefficients γ i were modeled using the non-random two-liquid (NRTL) model: ln nobreak0em.25em⁡ γ i = x j 2 [ τ j i ( G j i x i + x j G j i ) 2 …”

Liquid-liquid Equilibrium Determination and Data Correlation for 2,2,4-trimethyl Pentane - tripropylene Glycol Binary System

“…The thermodynamic model NRTL was completed with the binary interaction parameters specific to the binary 2,2,4-trimethyl pentane + TPG previously determined. The binary interaction parameters for the aromatics compound remained set to default (zero), as the aromatic compounds are completely miscible with TPG, as it was concluded by Fendu [14]. The single stage extraction process was calculated using a flash fed with a stream containing the mixture of hydrocarbons, and which has two products streams: Extract and Raffinate.…”

“…The possibility of using propylene glycols as solvents is studied by a research group from our university. 1,2-propylene glycol was the first solvent studied [10], and the research continued with dipropylene glycol [11][12][13] and with tripropylene glycol [14]. But propylene glycols application as solvents is not limited to aromatics extraction, they can be used for gas dehydration [15] or alcohols extraction as mentioned by Bumbac and Dumitrescu [16].…”

“…This paper brings into attention experimental data of liquid-liquid equilibrium for the binary system 2,2,4-trimethylpentane (isooctane) + 2-[2-(2-Hydroxypropoxy) propoxy] -1-propanol (tripropylene glycol -TPG) as well as information on experimental data processing by regression with NRTL thermodynamic model. In the previous lab experiments, it was observed that inferior aromatic hydrocarbons (benzene, toluene, ethylbenzene, xylenes) are totally miscible with TPG, and as consequence, the vapor-liquid equilibrium data for the binary systems formed by aromatics mentioned above and the solvent TPG was determined and are presented in a separate article, which is dedicated exclusively to modelling the vapor-liquid equilibrium data [14].…”