ABSTRACT

The vapour-liquid equilibrium (VLE) behaviour of the quaternary system, Methanol (1) + Isopropyl alcohol (IPA) (2) + Water (3) + Glycerol (4) at 53.33, 66.66, 79.99 and 95.2 kPa, has been studied experimentally using a Sweitoslawsky-type ebulliometer. The VLE data of this quaternary system at sub-atmospheric and ambient conditions will be useful in the process intensification design of bio-diesel production. Experimental VLE data were compared with predictions from Wilson and NRTL models using only the constituent binary interaction parameters. The predictions of equilibrium temperatures thus obtained using Wilson model compared well with the experimental values with an average root mean square deviation (rmsd T) of 0.3153 K. The binary system IPA (2) + Glycerol (4) was studied experimentally at 53.33, 66.66, 79.99 and 94.93 kPa and the data correlated with Wilson, NRTL, UNIQUAC and Peng- Robinson (PR) and Soave-Redlich-Kwong (SRK) equations of state (EoS) combined with Wong-Sandler (WS) mixing rules. Experimental data of this binary system was also compared with predictions from UNIFAC model. The VLE data of the binary system IPA (2) + Water (3) at 94.66 kPa is reported here and correlated with Wilson and NRTL activity-coefficient models. Wilson model represented the binary systems better than other models with a mean rmsd T of 0.2853 K for IPA (2) + Glycerol (4) and an rmsd T of 0.1390 for the IPA (2) + Water (3) system. MATLAB programming has been used for all the calculations.

Compounds

#	Formula	Name
1	CH4O	methanol
2	C3H8O	propan-2-ol
3	H2O	water
4	C3H8O3	glycerol

Datasets

The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type	Compound-#	Property	Variable	Constraint	Phase	Method	#Points
POMD	1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	mechanical oscillator	2
POMD	1	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	2
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	mechanical oscillator	2
POMD	2	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	2
POMD	2	Boiling temperature at pressure P, K ; Liquid	Pressure, kPa; Liquid		Liquid Gas	Ebulliometric method (Recirculating still)	4
POMD	3	Boiling temperature at pressure P, K ; Liquid	Pressure, kPa; Liquid		Liquid Gas	Ebulliometric method (Recirculating still)	1
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	mechanical oscillator	2
POMD	3	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	2
POMD	4	Boiling temperature at pressure P, K ; Liquid	Pressure, kPa; Liquid		Liquid Gas	Ebulliometric method (Recirculating still)	1
POMD	4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	mechanical oscillator	2
POMD	4	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	2
POMD	4 2	Boiling temperature at pressure P, K ; Liquid	Pressure, kPa; Gas Mole fraction - 2; Liquid		Liquid Gas	Ebulliometric method (Recirculating still)	72
POMD	2 3	Boiling temperature at pressure P, K ; Liquid	Mole fraction - 2; Liquid	Pressure, kPa; Gas	Liquid Gas	Ebulliometric method (Recirculating still)	17

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Experimental vapour - liquid equilibrium data of the quaternary system Methanol (1) + Isopropyl Alcohol (2) + Water (3) + Glycerol (4) along with Isopropyl Alcohol (2) + Glycerol (4) and Isopropyl Alcohol (2) + Water (3) binary data at atmospheric and sub-atmospheric pressures.

Soujanya, J., Reddy, C. A.[Ch. Anvesh], Satyavathi, B., Sankarshana, T.

ABSTRACT