Understanding the chemical and physical equilibria (VLE) behaviour of the solvent system is maybe the most important data needed for process development and process simulations. The setups available in this infrastructure can be divided into 3 categories:
We have basic analytical possibilities (amine and CO2 titration methods and TOC/TIC/NT) available in our labs.
Density and viscosity setups are presented as part of C1.3.
Low and medium pressure VLE setups: The setups are suitable for measurements up ~6 bars (max~140oC). There are in total 4 equipment. Currently, one of the setups allow direct measurement of amount of CO2 in the gas phase. This equipment can be used up to 80oC. The other setups the CO2 amount absorbed and present in the gas phase is based on mass balance. The choice of setup is dependent on the solvent as well as temperatures and pressures used.
Amount solvent needed from 150 ml to 500 ml depending on the setup. (see image "One of the autoclaves used to measure VLE")
High pressure VLE setup: This setup allows measurements up to 200 bar and 200oC. Methane is allowed in the setup and the equipment is typically used for high pressure applications, or for applications where methane solubility is of interest. Both liquid and gas phase are sampled and analysed with GC. Due to high pressures and experiments are very time consuming. Due to the high pressures, this setups requires intensive training and this cost has to be covered separately.
Volume of the cell is ~60ml and the minimum operating pressure is 5 bar. (see image "High pressure setup with GC")
Calorimeters: We have two calorimeters for the heat of absorption of CO2 studies. Furthermore, one of the setups can be used heat of crystallization/dissolution studies. Easily measurements up to 10bar can be done, but with some modification up to 20bar (or even higher) and 200oC can be reached.
The volumes of the calorimetric reactors 2L and 250 cm3. (see image "The calorimeter setup with 250 cm3 reactor")