Fa. Abu Al-rub et R. Datta, Isothermal vapor-liquid equilibrium of ethanol-water mixtures plus acetone-ethanol mixtures inside capillary porous plates, SEP SCI TEC, 35(14), 2000, pp. 2203-2225
Isothermal vapor-liquid equilibrium (VLE) of ethanol-water mixtures at diff
erent temperatures and the isothermal VLE of acetone-ethanol mixtures at 30
5.15 K were experimentally measured in three different macroporous plates:
a 13.5-mum pore diameter sintered stainless steel plate, a 30-mum pore diam
eter porous carbon plate, and a 30-mum pore diameter porous Teflon plate. T
he experimental results showed that the VLE of the ethanol-water system in
the porous sintered stainless steel plate was dramatically altered, and the
azeotropic point was shifted from ethanol mole fraction of 0.90 to > 0.99.
However, there was no significant effect of this plate on the acetone-etha
nol system. The effect of either the porous Teflon plate or the porous carb
on plate on the VLE was insignificant for both systems. These results show
that for substantial alteration of the VLE binary mixtures, two conditions
are required: the liquid components must be of different polarity, and the
porous plate should possess high polarization.