Vapour-Liquid-Equilibrium-Determination from vacuum (1 mbar) up to overpressure (50 bar)
Scientists and chemical engineers in industry, research and teaching still measure phase equilibria
despite the significant improvement in theoretical evaluations.
For that reason, the FISCHER® phase equilibrium apparatus is part of the standard equipment in
chemical engineering laboratories.
The vapour-liquid equilibrium of binary and multi-component mixtures constitute an essential basis for
the determination of the theoretical plates necessary for the evaluation of separation processes.
Although VLE-data are known from literature, there is still an increasing tendency towards
redetermining equilibrium data by experiments, because the thermodynamic parameters like pressure,
temperature and concentrations are different or inadequate.
Especially the theoretically additional evaluation of the temperature and pressure dependence of
phase equilibrium is insufficient very often in daily practice, thus the experimental determination of
VLE-data is increa- singly requested in the overpressure range, too.
ILUDEST®/ i-Fischer® modified the VLE-equipment, since decades sold under the world-known
FISCHER® -brand, suitable for the overpressure range up to 50 bar. The VLE-equipment is designed for
a charge of 50 ml (dynamic mode) and can be operated under vacuum (1...1,013 mbar), atm-condition
and overpressure (1...50 bar) as well as temperature up to 250°C. An extended operating range up to
100 bar is possible.