Phase Equilibrium


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Phase Equilibrium

Synthetic measurement of liquid-vapour and liquid-liquid transitions

It consists mainly of a high pressure measuring cell (100 MPa) equipped with a sapphire window in order to determine the transition conditions either visually (gas to condensate) or by the classical "PV" technique (opaque fluid).

High pressure microscopy device (100MPa) solid fluid transition (Wax)

Il s'agit d'une cellule composée de deux hublots en saphir se faisant face afin d'observer un échantillon d'épaisseur de fluide millimétrique ou submillimétrique. Un microscope à longue frontale permet d'observer le fluide malgré la présence des fenétres en saphir

High Pressure Filtration Package (100MPa)

This device comprises a PVT cell free from a HP filtration device associated with apressure-controlled pump in order to carry out isobaric filtration. It can be used to separate solid deposits (Wax, asphalt or other) from the fluid phases in order to analyse them.

Quartz Microbalance PVT cell - Study of asphalt instability

It consists mainly of a high pressure (100 MPa) measuring cell controlled in pressure and closed by an autoclave plug with electrical contacts allowing the connection of a quartz resonator positioned inside the cell. In this device, the extreme sensitivity of the quartz resonator is used to indirectly detect transitions with little thermal or volumetric effect in opaque fluids. It is particularly suitable for the study of asphaltenic fluids.

High pressure titration device (100MPa)

This experimental unit consists of a pressure-controlled PVT cell and a HP pump syringe. It is used to make titration measurements, to simulate injections of liquid or gaseous solvents, or to carry out swelling studies by gas injection under tank conditions.

Gas clathrate devices (15MPa)

Several experimental devices made up of high pressure (15MPa) measuring cells, equipped or not with sapphire portholes (for a visualization of the phenomena and reaction products) and temperature-controlled (-10 to +80°C), allow to study the conditions of formation and decomposition of gas ckathrates and to carry out a kinetic follow-up of the reactions. Two of these devices are connected to gas chromatographs allowing to sample under pressure and to follow the variation of the composition of the gas mixtures during the crystallization of the clathrates.