Home > Research at LGC > Transversal research topics > Complex fluid thermodynamics

Area of action

Research activities concerning the thermodynamics at the LGC cover a wide range of material systems, experimental techniques and models used in process engineering :

- solid/liquid systems:

  • measurement and prediction of the solubility of active substances in different solvents
  • Diagrams of metallic phases
  • Melting curves and inter-esterification of vegetable oils
  • Purification in molten salt media

- electrolytic systems:

  • Measurement of water activity and of the mixture volume to determine the hydration rate of sugars in solution.
  • The modelling of acid-base equilibrium in wines; followed by pH in fermented environments
  • Equation of the osmotic virial for colloidal systems

- Liquid/ Vapour systems

  • Simulation of residual curves for the design of distillation columns
  • Regression of vapour-liquid equilibrium data and mixture activity coefficient models (NRTL, UNIFAC UNIQUAC, etc.)

- Supercritical systems

  • Measurements and modelling of properties for binary systems in supercritical CO2

- Models

  • Development of thermodynamic models with the rule of complex mixtures for S-L1-L2-V-sC systems and HIx-H2SO4 strong electrolytic systems
  • Use of equation of state models SAFT (PC-SAFT, soft-SAFT)
  • Use of models based on first principles (COSMO-SAC)
  • Use of molecular simulation methods (NPT, Gibbs ensemble Monte Carlo, Mesoscale dynamics)
    - simulation of agglomeration processes
    - simulation of liquid / vapour equilibria in nitriles

- Processes

  • combined exergy and pinch analysis
  • exergy balances in Process simulator