Carbon dioxide

In our research group an device was developed that is suitable for accurate, cost- and time-efficient automated detection of the melting temperature in a high pressure carbon dioxide atmosphere.

During an international colleboration, we developed an extraction - impregnation proccess using supercritical carbon-dioxide, which is suitable for the production of materials with antiviral properities

The data of phase equilibria is required for high-pressure process design. Carbon dioxide is frequently modified with organic solvents or solvent mixtures. The effect of these modifiers are usually estimated with computational methods from the behaviour of binery mixture of the solvents from measured data. 

Research topics are related to the use of carbon dioxide as an extractive agent and reaction medium, also there are opportunities to take part in thermodinamic modelling and measurement of phase equilibria. 

In the research group,  a continuous stripper has been developed, which enables controllable solvent remove from dilute solutions with the help of high-pressure carbon dioxide. 

In this research,  the solubility diagram of a chiral ternary system and its application during enantiomeric enrichment was investigated at atmospheric pressure and in supercritical carbon dioxide.

Ionic liquids could be promising for biphasic reaction media and CO₂ capture, where understanding phase behavior under supercritical CO₂ is essential for high-pressure applications. 

The melting point of most compounds increases with mechanical or hydrostatic pressure, but some high-pressure fluids can dissolve into the solid sample, causing a decresase in melting temperature. This phenomenon is exploited in a number of applications, such as in polymer industry for easier machining and in the development of controlled size particle producing, such as PGSS (Particles from Gas Saturated Solutions). The design and optimisation of these and similar high-pressure operations can be supported by the knowledge of the pessure and temperature dependence of thermodynamic parameters.

In cooperation with the Solid State Energy Storage Research Group of ELTE TTK, led by Róbert Kun, we produced sulfur – carbon composites, which prove to be a promising chatode material for lithium batteries.

Jelenlegi kutatási témáink közé tartozik a szén-dioxid extrakció ágensként, reakciós közegként való alkalmazása, emellett lehetőség van termodinamikai fázisegyensúlyi modellezési és mérési kutatásokba is bekapcsolódni.