1. Introduction For bulk fluids it is always possible to establish the state of the equilibrium coexistence between vapour and liquid phases by putting these phases in contact. In contrast, the fluids confined in mesoporous matrices can reside in different quasi-equilibrium coexistence states for very long periods of time. The transition between these metastable states occurs via changes in the...

The aim of this communication is to analyse the influence water activity and total pressure on evaporation. system composed liquid gas phases, separated by a plane surface, contained in cylinder whose volume regulated piston. Water saturated salt solutions experimental device procedures were defined limit temperature variation at interface. A transient method used. From steady state, increment ...

Conditions for thermodynamic equilibrium of liquid drops on solid substrates are presented. It is shown that if surface force (disjoining/conjoining Derjaguin pressure) action in a vicinity of the three-phase contact line is taken into account the condition of thermodynamic equilibrium is duly satisfied. Then the thermodynamic expressions for equilibrium contact angles of drops on solid substra...

INTRODUCTION Multi stage distillation processes are normally operated in columns, equipped with trays or packing to obtain counter current flow of vapour and liquid. In tray columns the liquid is moving from the inlet over the active area to the exit downcomer. The necessary mass transfer area between the phases is achieved by intense mixing of vapour and liquid on the bubbling area. In packed ...