This is a static-analytical phase equilibrium setup designed for accurate measurements at a wide temperature and pressure range and for a variety of fluids including toxic, explosive, sulphur containing, and corrosive mixtures at a wide pressure and temperature range. Both online and offline analysis of samples are facilitated.
In the design of the facility, there was an emphasis on accuracy, safety, and chemical compatibility with relevant components. The temperature of the cell is accurately controlled using liquid thermal baths. Accurate syringe pumps will be used to inject the fluids under test and to set their pressure. A GC with thermal conductivity (TCD) and flame ionization detectors (FID) facilitates accurate composition analysis of most fluids. The novel sampling system is also prepared for electrolytes and more tricky components for which external analytical techniques can be applied. Some mixture systems will form multiple liquid phases. Hence, the cell has three sampling points with adjustable height.
Thermodynamics, phase and chemical equilibrium measurements
Phase equilibrium cell
Water purification / degassing system
Summary of specifications:
• Temperature: -60 – 150 (200) °C
• Pressure: 4 – 1 000 bar
• Have capabilities for electrolytes / brines
• Ideal for equilibria with multiple phases
The cell is specifically made for CCS, with a wide pressure range and robust material choices. It is expected that the cell will provide very high accuracy considering the wide pressure range.
The facility is located in the thermal laboratories of NTNU/SINTEF with its available infrastructures and services. Specifically, it could be a great advantage to utilize the ECCSEL TA8.3 CO2Mix setup for accurate gravimetric preparation of CO2-rich mixtures for calibration of the composition measurement systems. The facility is also directly adjacent to the offices of leading scientists in the field of SINTEF and NTNU.
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