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Isothermal VaporLiquid Equilibria for n Hexane + 1Propanol System near Critical Region. Byung Chul Oh , Youngdae Kim, Hwayong Kim School of Chemical Engineering, Seoul National University. Introduction.
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Byung Chul Oh, Youngdae Kim, Hwayong Kim
School of Chemical Engineering, Seoul National University

Materials
nHexane : Fluka with a 99.5% purity
1Propanol : ALDRICH with a 99.5% purity
Thermometer
Probe : 5614, Indicator : 1560 supplied by Hart Scientific Co.
( accuracy ±0.03K in 373~673K )
Pressure tranducer
STJE/18332 supplied by Sensotec Co.
( range <1000 psia, accuracy ±0.1% )
Gas Chromatography
Model : DS6200 ; Detector : TCD
Column : Porapak Q in 0.95 cmO.D. and 85 cmlong

K.O.
DRUM
LIQUID
FEED
TANK1
LIQUID
FEED
TANK2
PT
TT
PG
PG
DRAIN
View cell
CIRCULATION
PUMP
PG
CONVECTION
OVEN
VENT
SAMPLE
SAMPLE
VACUUM LINE
LIQUID PUMP
SAMPLING BOX
VACUUM PUMP
CONVECTION OVEN
T
T
VACUUM
VACUUM
SAMPLING BOX
CARRIER GAS
HOT INSULATION
HOT INSULATION
GAS CHROMATOGRAPHY
Modified PengRobinson Equation of state
with WongSandler mixing rule
NRTL Activity coefficient Model
with
where

Thermodynamic Models
MultiFluid Nonrandom Lattice Fluid with Hydrogen Bonding Equation of State (MFNLFHB )

PRSVWSNRTL
45℃ data : Brown I., Fock W., Smith F., J. Chem. Thermodyn., 1, 273(1969)
MFNLFHB
Comparison of measured data with correlation values for nhexane (1) + 1propanol (2)
○, 483.15K; □, 493.15K;
Δ, 503.15K; ◊, 513.15K;
●, critical points;
−−−, calculated by PRSVWS EOS;
—— , calculated by MFNLFHB EOS.
Critical locus and pure vapor pressure curve for nhexane (1), 1propanol (2), and an azeotropic mixture (3):
●, critical points; ○, pure vapor pressure points from this work;
□, azeotrope points; △, critical points of pure components
……… , interpolation curve of experimental data; —— , vapor pressure curve.
Critical locus and pure vapor pressure curves for nhexane (1), 1propanol (2), 2propanol (3):
●, this work; ○ ,Seo et al.[ J. Chem. Eng. Data 48 (2003) 856 ];
, critical points of pure components ; , interpolation curve;
—— (4), critical locus calculation for nhexane + 1propanol system;
—— (5), critical locus calculation for nhexane + 2propanol system;
using PRSVWS EOS.