T. Sako et al., HIGH-PRESSURE VAPOR-LIQUID AND VAPOR-LIQUID-LIQUID EQUILIBRIA FOR SYSTEMS CONTAINING SUPERCRITICAL CARBON-DIOXIDE, WATER AND FURFURAL, Fluid phase equilibria, 108(1-2), 1995, pp. 293-303
We measured vapor-liquid equilibrium for a binary system CO2-furfural
at temperatures of 303 and 323 K and vapor-liquid-liquid equilibrium f
or a ternary system CO2-water-furfural at temperatures of 303, 323 and
343 K and pressure of 5 MPa to obtain fundamental data for concentrat
ion of furfural by using three phase separation technique. Furthermore
the experimental data were compared with results calculated by the Pe
ng-Robinson equation of state combined with an asymmetric mixing rule.
Results indicated that (1) the furfural-rich liquid phase contained m
ore than 90wt% furfural on CO2-free basis and its concentration increa
sed with decrease in temperature, and (2) the Peng-Robinson equation c
orrelated the binary vapor-liquid equilibrium satisfactorily and estim
ated the ternary vapor-liquid-liquid equilibrium fairly well.