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by Karine Ballerat - 9 November 2015

All the versions of this article: English , français


Researches in the field of capture and storage of CO2 combine original experimental methods and thermodynamic model uses.

- Thermodynamic and Physico-chemical properties studied:

Volumic masses, molar, excess, standard volumes...

Solution enthalpies of Gas in solution, coupled with indirect determination of gas solubility limits
liquid-liquid mixing enthalpies
Protonation enthalpies
Specific heat capacities, excess, standard heat capacities...

Liquid-liquid or liquid-gas phase separation temperature
Phase diagrams

pKa, equilibrium constants...

- Experimental methodes available:

Vibrating tube densimetersto work from -20°C to 400°C pressure up to 400 bars.

Micro-calorimeters with fluxmetric detection for liquid-liquid or liquide-gas mixing.
MicroDSC for the determination of phase transitions with low energy and heat capacities, up to 200°C.
Picker type calorimeter with power compensation for heat capacities up to 400°C and 400 bars.

Phase equilibria
Phase equilibria cell for visualisation of LL and LV phase separation up to 125°C and 400 bars.

automatic titrator for aqueous solutions (glass electrode) up to 70°C

- Modelisation Group contribution (UNIFAC)
Local composition (NRTL, UNIQUAC...)
Activity coefficients and fugacity models
Molecular simulation (force field, prediction of properties derived from Gibbs Energy)