High Pressure Process Engineering and Environmental Engineering

In 1978 the research field of high pressure engineering, mainly supercritical CO2 applications were established. Since then high pressure extraction with supercritical CO2 has been a sustaining highlight of our research activities. The production of valuable and/or active ingredients from biobased feed, as targeted in phytoextraction, has played a major role. Experience in isolating flavors, fragrancies and constituents from solids and liquids, decaffeination of coffee and tea, isolation of pigments and several value added products from complex feed matrices in downstream processing has been a fascinating challenge ever since. The greatest advantage of CO2 based high pressure technology is that completely solvent free products of highest quality can be prepared. The equipment of our lab enables processing of solid and liquid raw materials. We can run batch processes from 300 ml scale up to 10 l pilot scale and perform continuous fractionation of liquid raw materials in a counter current high pressure extraction column. At present CO2 fractionation of liquid mixtures in micro mixers is a fascinating challenge.

An important area of sustaining and growing interest is the impregnation of construction materials for surgery applications in and with supercritical fluids, like impregnation of artificial hip and knee prostheses, production of long term therapeutics, improvement of stability and optimisation of material properties, etc.

CO2 based high pressure processes are highly flexible in producing ultrafine particles in nano scale and micro scale, since operation conditions may be adjusted to the properties and needs of the feed material.

High Pressure Process Engineering has been the driving force for establishing the Central Lab Biobased Products, an initiative of Joanneum Research, the University of Graz and Graz University of Technology.

High Pressure Process Engineering and

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