Research Group of Extraction and High-Pressure Unit Operations

JA Purity IV JA Purity IV

Carbon dioxide, while it seems strange, is applicable unlimitedely in both the pharmaceutical and food industry. One might pose the question why: carbon-dioxide at appropriate elevated pressures can be converted to a liquid surving as a solvent, however supercritical phase is also feasably achievable (above 33°C and 73.8 bar). Latter is the result of a so-called second-order phase transition where this new state is neither a liquid nor a gaz. However some of its properties are similar to a liquid while the other resemble a gas. Our research group studies the subject with regard to both application and basic research. 

Water is well-known for everybody, the fundament of life. However, at high pressures and temperatures ( above 200°C and 100 bar) is shows an unexpected behaviour. It gradually shift its solvent properties towards an organic solvent (ambient water → ethanol → aceton) as we increase the temperature in a liquid state. Parallely, the reaction usually accelerate as the temperature inceases, therefore we can obtain a green solvent with organic character and an intensified reaction environment. Our group mainly focues on recycling of waste materials.

 

Carbon dioxide

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. 

Plant extraction

Our research group recurse to decades-long history of classical extraction. Parallely there is opportunity to take part in carbon dioxide based extraction research.

Reaction medium

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Phase equilibria

The modelling and measurement of phase equilibria is both of intrest. 

There is opportunity to engage in both modelling (Aspen, Chemcad) and experimental (gas-liquid or solid-liquid) work. 

Further information: Solid - liquid phase transition under high pressure atmosphere

 

Hydrothermal

At elevated temperatures and pressures (above 200°C and 100 bar) an apolaric character arises in liquid water systems meanwhile the temperature alos enhances both hydrolytic catalysis and reactant nature of water. In the wideranging research field of hydrothermal systems we are conducting research in waste valorization. 

 

Waste recycling

in the last 210 years