Extraction – Adsorption – Reaction – Phase Transition – Refrigeration

Extraction / Impregnation

M.A. Fanovich, J. Ivanovic, I. Zizovic, D. Misic, P. Jaeger: Funktionalization of polycaprolactone/ hydroxyapatite scaffolds with Usnea lethariiformis extract by using supercritical CO2, Materials Science and Engineering C 58 (2016) 204-212.

L. Goimila, P. Jaeger, I. Ardao, J.-L. Gómez-Amoza, A. Concheiro, C. Alvarez-Lorenzo, C. A. García-González: Preparation and stability of dexamethasone-loaded polymeric scaffolds for bone regeneration processed by compressed CO2 foaming, Journal of CO2 Utilization 24 (2018) 89–98.

R. Obaidat, M. Alnaief, P. Jaeger: Significant solubility of carbon dioxide in Soluplus® facilitates impregnation of ibuprofen using supercritical fluid technology, Pharmaceutical development and technology 23 (2018) 7, 697-705.

Refrigeration

Supercritical drying of fragile structures

A crucial step in manufacturing aerogels is the drying process. It is of utmost importance not to destroy the fragile micropores of the gel network due to excessive capillary forces that appear in conventional drying processes. Current developments tackle the challenge to improve the economical feasibility of the supercritical drying process that takes place at elevated pressures and to enable manufacturing of various geometries required by specific applications.

Rapid Gas Decompression

Diffusion – Swelling – Nucleation – Microblistrering – Micro Voids

M.A. Fanovich, P. Jaeger: Sorption and diffusion of compressed carbon dioxide in polycaprolactone for the developement of porous scaffolds. Mat. Sci. Eng. C. 32 (2012) 961-968.

F. Meyer, P. Jaeger, R. Eggers, M. Stamenic, S. Milanovic, I. Zizovic: Effect of CO2 pre-treatment on scCO2 extraction of natural material, Chem. Eng. Proc.: Process Intensification 56 (2012) 37-45.

Enhanced Oil Recovery

P.T. Jaeger, M. Alotaibi, H. Nasr-El-Din: High-pressure Application in Enhanced Crude Oil Recovery, Chapter 7 in “Industial High Pressure Processes” by R. Eggers (Ed.) Wiley-VCH Weinheim, 2012.

P.T. Jaeger: Interfacial Phenomena in Enhanced Oil and Gas Recovery, Habilitation at Hamburg University of Technology, 2014.

J. Wang, D. Ryan, M. Szabries, and P. Jaeger, A Study for Using CO2 To Enhance Natural Gas Recovery from Tight Reservoirs, Energy Fuels 2019, 33, 3821−3827.

M. Szabries, P. Jaeger, M. Amro: Foam Analysis at Elevated Pressures for Enhanced Oil Recovery Applications, Energy and Fuels Energy Fuels 33 (2019) 5, 3743-3752.

Polymer decontamination and recycling

During the first usage of a polymer it may have experienced contamination, e.g. as pipeline material by having been in contact with fluids like hydrocarbons. Before being able to process the material for manufacturing a new product, the recycled polymer needs to undergo a decontamination step which can be carried out by supercritical extraction. As an example for a further usage, manufacturing of an aerogel is a viable option. Different solvents are tested to produce gels that are subsequently dried with help of supercritical CO2. An integrated process is proposed that can save de decontamination step while obtaining a recycled product with a high added value.

Reference:
G.-S. Beyerlein, A. Zeinolebadi, N. Aboud, P. Jaeger, Supercritical fluid decontamination (SCFD)
of poly(vinylidene fluoride) (PVDF) and further upcycling into highly porous aerogels with a well defined microstructure. J. Clean. Prod. 446 (2024) 141426

A. Zeinolebadi, A. Schwaderer, S. Beuermann, T.v. Ostrowski, P. Jaeger: Effects of supercritical carbon dioxide sorption on the microstucture of poly(vinylidene fluoride). Jornalof supercritical Fluids 177 (2021) 105347