The heart of the work done at CTP is the thermodynamics of phases equilibria that combine the modelling work, the experimental work but also the design of innovative tools for the thermophysical properties measurement. The CTP develops and/or modifies existing experimental tools in order to carry out its work. It develops new experimental protocols including the calibration and the estimation of the measurement uncertainties. The CTP attaches great importance to data treatment and to the comparison with data from the literature. To conclude, the CTP develops original thermodynamic and kinetic models in order to control the phenomena and predict the behaviours. The aspects related to the transfer of the software and/or the models to the industry are part of the concerns of the CTP's researchers. The activities of the CTP are mainly part of Axes 2 and 3 of the Energy and Processes department, Decarbonation of the processes and New and Renewable Energies, but they can be extended to other fields since the fluid thermodynamics is a "pillar theme" of process engineering. CTP is also active in the fields of education and training proposed at Mines ParisTech.