Philip Jaeger, Ph.D., Professor

Petroleum Production Systems

• Full professor at Clausthal University of Technology since 2020
• Since 2009: Global courses and training on high-pressure technology and experimentation
• 2004–2021 Lecturer at Hamburg University of Technology
• 2014 Habilitation thesis: “Interfaces in Enhanced Oil and Gas Recovery”
• Since 1998 Managing Director of Eurotechnica GmbH (Germany)
• 1997 PhD “Supercritical liquid fractionation with carbon dioxide”
• 1992 Bachelor’s degree in Chemical Engineering

• Head of Petroleum Production Systems

• GeoSonde400+: Medium-depth closed geothermal systems
• Well Integrity in Deep Geothermal Systems
• Well Integrity in Hydrogen Storage
• Gas separation in hydrogen/nitrogen/ammonia systems
• CO2-enhanced oil recovery

• Technical challenges in deep geothermal systems
• Interfacial phenomena in fluid-liquid-solid systems at elevated pressures
• Safe handling, transport, and purification of compressed gas mixtures containing CO2, H2, NH3, CH4, and H2S
• Material compatibility in hazardous environments
• Supercritical Fluid Extraction, CO2-EOR, CCUS

• Thermodynamics and Phase Behavior
• Hydrocarbon conditioning and processing
• Oil and gas production
• Geothermal production systems/advanced geothermal systems
• Material properties

ORCID Profile | Google Scholar

• Wang, Huachuan, Shangtong Yang, Stephanie Flude, Ketong Zhang, Qianbing Zhang, Jian Zhao, and Zoe K. Shipton. "Development, challenges, and potentials of underground energy storage systems." Tunnelling and Underground Space Technology 170 (2026): 107360.
• Leontijevic, Vesna, Tijana Fechter, Danilo Cantero, Philip Jaeger, and Maria José Cocero. "Surface wettability of lignin materials from supercritical water hydrolysis of wood." The Journal of Supercritical Fluids 217 (2025): 106458.
• Mohammadi, Shahram, William Kobby Jones, Philip Jaeger, and Hanin Samara. "Experimental investigation of thermophysical properties in CO2-saturated brine under variable temperatures (303 to 333 K), pressures (0.1 to 30 MPa), and salt types and concentrations." Discover Applied Sciences 7, no. 9 (2025): 984.
• Stemmle, Ruben, Alireza Arab, Sebastian Bauer, Christof Beyer, Guido Blöcher, Claire Bossennec, Maximilian Dörnbrack et al. "Current research on aquifer thermal energy storage (ATES) in Germany." Grundwasser (2025): 1-18.
• Samara, H., T. V. Ostrowski, and P. Jaeger. "Interfacial and transport properties of supercritical hydrogen and carbon dioxide in unconventional formations." The Journal of Supercritical Fluids 205 (2024): 106124.
• Beyerlein, Gerd-Sebastian, Ahmad Zeinolebadi, Noor Aboud, and Philip Jaeger. "Supercritical fluid decontamination (SCFD) of poly(vinylidene fluoride) (PVDF) and further upcycling into highly porous aerogels with a well-defined microstructure." Journal of Cleaner Production 446 (2024): 141426.
• Gao, Huhao, D. Zhou, A. Tatomir, K. Li, L. Ganzer, P. Jaeger, G. Brenner, and M. Sauter. "Estimation of recovery efficiency in high‐temperature aquifer thermal energy storage considering buoyancy flow." Water Resources Research 60, no. 11 (2024): e2024WR037491.
• Fechter, Tijana, Rafael Villablanca-Ahues, Vesna Leontijevic, Angel Martin, Philip Jaeger, and Maria Jose Cocero. "Interfacial tension of water near critical conditions using the pendant drop method: New experimental data and a correlation based on the parachor method." The Journal of Supercritical Fluids 196 (2023): 105899.
• Abdalla, Ramez, Wolfgang Hollstein, Carlos Paz Carvajal, and Philip Jaeger. "Actor-critic reinforcement learning leads decision-making in energy systems optimization—steam injection optimization." Neural Computing and Applications 35, no. 22 (2023): 16633-16647.
• Wang, Jinsheng, Hanin Samara, Vivien Ko, Dustin Rodgers, David Ryan, and Philip Jaeger. "Analysis of the impact of CO2 adsorption on rock wettability for geological storage of CO2." Energy & Fuels 37, no. 18 (2023): 14046-14052.
• Abdalla, Ramez, Waleed Al-Hakimi, Nelson Perozo, and Philip Jaeger. "Real-time liquid rate and water cut prediction from the electrical submersible pump sensors data using machine-learning algorithms." ACS omega 8, no. 14 (2023): 12671-12692.
• Aboulrous, Amany A., Philip Jaeger, Hanin Samara, Martina Szabries, Héctor Cano Esteban, Maria Romero Lopez, Juan A. de Isabel, and Eman M. Mostafa. "Cytotoxicity and performance of Pectin/Ferric vanadate oxide/Cetyltrimethylammonium Bromide foaming nano-system for drilling sustainable geothermal wells." Geothermics 110 (2023): 102686.
• Samara, H., Al-Eryani, M., Jaeger, P., 2022. The role of supercritical carbon dioxide in modifying the phase and interfacial properties of multiphase systems relevant to combined EOR-CCS. Fuel 323, 124271. https://doi.org/10.1016/j.fuel.2022.124271
• H. Samara and P. Jaeger, “Experimental determination of wetting behavior under non-atmospheric conditions relevant to reservoirs: a practical guide,” SN Appl. Sci., vol. 4, no. 3, p. 85, Mar. 2022
• J. Wang, H. Samara, P. Jaeger, V. Ko, D. Rodgers, and D. Ryan, “Investigation of CO₂ Adsorption and Wettability of Reservoir Rocks,” Energy Fuels, vol. 36, no. 3, pp. 1626–1634, Feb. 2022.
• J. Wang, D. Ryan, H. Samara, P. Jaeger: Interactions of CO₂ with Hydrocarbon Liquid Observed from Adsorption of CO₂ in Organic-Rich Shale, Energy Fuels 34 (2020), 14476–14482.
• A. Almeida da Costa, G. Costa, M. Embiruçu, J. B. P. Soares, J. J. Trivedi, P. S. Rocha, A. Souza, P. Jaeger: The Influence of Rock Composition and pH on Reservoir Wettability for Low-Salinity Water-CO2 Enhanced Oil Recovery Applications in Brazilian Reservoirs, SPE-195982-PA (2020).
• M. Szabries, P. Jaeger: Trends in oil and gas production - current challenges in research and development, EEK 136 (2020) 9, 19–23.
• A. Alasali, N. Aboud, K. Kuchta, P. Jaeger, A. Zeinolebadi: Assessment of supercritical CO2 extraction as a method for plastic waste decontamination, Polymers 2020, 12, 1347.
• J. Wang, P. Jaeger, H. Samara, D. Ryan: Simultaneous Evaluation of Time-dependent Phase and Wetting Properties of Hydrocarbon Liquids for CO₂-Enhanced Recovery of Oil and Gas from Tight Reservoirs, Energy and Fuels, doi.org/10.1021/acs.energyfuels.9b03576.
• S. Knauer, L. Quynh-Hoa, R. Baessler, P. Jaeger: Contact angle and corrosion of a water–CO₂ system on X70 and S41500 at 278 K and pressures up to 20 MPa, International Journal of Greenhouse Gas Control 89 (2019) 33–39.
• T. Oldenburg, P. Jaeger, J. Gros, S. Socolofsky, S. Pesch, J. Radovic, A. Jaggi: Physical and Chemical Properties of Oil and Gas Under Reservoir and Deep-Sea Conditions in Deep Oil Spills, Springer 2020
• doi.org/10.1007/978-3-030-11605-7
• H. Samara, Li Ke, T.v. Ostrowski, L. Ganzer, P. Jaeger: Unconventional oil recovery from Al Sultani tight rock formations using supercritical CO2, J. of Supercritical Fluids 152 (2019) 104562.
• J. Wang, D. Ryan, M. Szabries, P. Jaeger, A Study on 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 33 (2019) 5, 3743–3752.
• L.Q. Hoa, R. Baessler, S. Knauer, P. Jaeger, A. Kratzig, D. Bettge, A. Kranzmann: Droplet Corrosion of CO2 Transport Pipeline Steels in Simulated Oxyfuel Flue Gas, CORROSION 74 (2018), No. 12, pp. 1406–1420.
• S. Pesch, P. Jaeger, A. Jaggi, K. Malone, M. Hoffmann, D. Krause, T.B.P. Oldenburg, M. Schlüter: Rise Velocity of Live-Oil Droplets in Deep-Sea Oil Spills, Environm. Eng. Sci. 35 (2018) 4, 289-299.
• 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.
• S. Knauer, M. Schenk, T. Köddermann, D. Reith, P. Jaeger: Interfacial Tension and Related Properties of Ionic Liquids in CH4 and CO2 at Elevated Pressures: Experimental Data and Molecular Dynamics Simulation, JCED, J. Chem. Eng. Data, (2017), 62 (8), 2234-2243.
• M.A. Fanovich, J. Ivanovic, I. Zizovic, D. Misic, P. Jaeger: Functionalization of polycaprolactone/hydroxyapatite scaffolds with Usnea lethariiformis extract using supercritical CO2, Materials Science and Engineering C 58 (2016) 204-212.
• P.T. Jaeger: Interfacial Phenomena in Enhanced Oil and Gas Recovery, Habilitation at Hamburg University of Technology, (2014).
• M.A. Fanovich, J. Ivanovic, D. Misic, M.V. Alvarez, P. Jaeger, I. Zizovic, Rudolf Eggers: Development of a polycaprolactone scaffold with antibacterial activity via an integrated supercritical extraction and impregnation process, Journal of Supercritical Fluids 78 (2013) 42–53.
• P.T. Jaeger, M. Alotaibi, H. Nasr-El-Din: High-pressure Applications in Enhanced Crude Oil Recovery, Chapter 7 in "Industrial High Pressure Processes" by R. Eggers (Ed.), Wiley-VCH Weinheim, (2012).
• P. Jaeger, R. Eggers: Interfacial properties at elevated pressures in reservoir systems containing compressed or supercritical carbon dioxide, J. Supercrit. Fluids 66 (2012), 80–85.
• M.A. Fanovich, P. Jaeger: Sorption and diffusion of compressed carbon dioxide in polycaprolactone for the development of porous scaffolds, Mat. Sci. Eng. C, 32 (2012), 961–968.
• P.T. Jaeger, M. Alotaibi, H. Nasr-El-Din: Influence of Compressed Carbon Dioxide on the Capillarity of the Gas-Crude Oil-Reservoir Water System, J. Chem. Eng. Data (2010), 55, 5246–5251.
• O.G. Niño-Amezquita, S. Enders, P.T. Jaeger, R. Eggers, Interfacial properties of mixtures containing supercritical gases, J. Supercrit. Fluids 55 (2010), 724-734.
• M. Stamenic, I. Zizovic, R. Eggers, P. Jaeger, H. Heinrich, E. Rojc, J. Ivanovic, D. Skala: Swelling of Plant Material in Supercritical Carbon Dioxide, J. of Supercritical Fluids 52 (2010) 125–133.
• O. G. Nino-Amezquita, S. Enders, P.T. Jaeger, R. Eggers: Measurement and Prediction of Interfacial Tension of Binary Mixtures, Ind. Eng. Chem. Res. 49 (2010), 592-601.
• P. Jaeger, R. Eggers: Interfacial Tension of Ionic Liquids at Elevated Pressures, Chem. Eng. Proc., 48 (2009), 1173–1176.
• P. Jaeger, A. Pietsch: Characterization of Reservoir Systems at Elevated Pressures, J. Petrol. Sci. Eng. 64 (2009) 1–4, 20–24.
• Y. Sutjiadi-Sia, P. Jaeger, R. Eggers: Interfacial Phenomena of Aqueous Systems in Dense Carbon Dioxide, J. Supercrit. Fluids 46 (2008), 272–279.
• Y. Sutjiadi-Sia, P. Jaeger, R. Eggers: Interfacial Tension of Solid Materials against Dense Carbon Dioxide, J. Coll. Interf. Sci. 320 (2008), 268–274.
• P. Zacchi, S. Calvo-Bastida, P. Jaeger, M.J. Cocero, R. Eggers: Countercurrent De-acidification of Vegetable Oils Using Supercritical CO2: Holdup and RTD Experiments, J. Supercrit. Fluids 45 (2008) 2, 238–244.
• Arne Pietsch, P. Jaeger: Concentration of Squalene from Shark Liver Oil by Short-Path Distillation, Eur. J. Lipid Sci. Technol. 109 (2007), 1077–1082.
• S. Voges, P. Jaeger, R. Eggers: Solid Bed Properties under High Gas Pressure, Chem. Eng. Technol. 30 (2007) 6, 709–714.
• P. Jaeger, R. Eggers, S. Buchner: Sorption Kinetics of High-Pressure Gases in Polymeric Tubing Materials, Proc. OMAE (2006), June 4–9, 923–93.
• P. Zacchi, A. Pietsch, S. Voges, A. Ambrogi, R. Eggers, P. Jaeger: Concepts of Phase Separation in Supercritical Processing, Chem. Eng. Processing 45 (2006), 728–733.
• P. Zacchi, J. Daghero, P. Jaeger, R. Eggers: Extraction/Fractionation and De-acidification of Wheat Germ Oil Using Supercritical Carbon Dioxide, Brazilian Journal of Chem. Eng. 23 (2006) 1, 105–110.
• Ph.T. Jaeger, R. Eggers: Liquid–liquid Interfaces at Extreme Pressures in the Presence of Compressible Fluids, Thermochimica Acta, 438 (2005) 16–21.
• R. Eggers, Ph.T. Jaeger: Interfacial Phenomena in Countercurrent and Spray Processing Using Supercritical Fluids, Chapter 2.2 in G. Brunner (ed.): Supercritical Fluids as Solvents and Reaction Media, Elsevier, (2004).
• R. Eggers, Ph.T. Jaeger, A. Ambrogi: Short-term high-temperature conditioning of rapeseed, Lebensmittel Technik 11 (2004), 58–59.
• R. Eggers, Ph.T. Jaeger: Extraction Systems, Chapter 3 in C. Tzia (ed.): Extraction Optimization in Food Engineering, Marcel Dekker, (2003).
• Ph.T. Jaeger, R. Eggers, H. Baumgartl: Interfacial Properties of High-Viscosity Liquids in a Supercritical Carbon Dioxide Atmosphere, J. Supercrit. Fluids 24 (2002), 203–217.
• P.C. Simoes, R. Eggers, Ph.T. Jaeger: Interfacial Tension of Edible Oils in Supercritical Carbon Dioxide, Eur. J. Lipid Sci Technol. (2000), 263–265.
• Ph.T. Jaeger, R. Eggers: Wetting Characteristics in Countercurrent Columns Using Supercritical Carbon Dioxide, Proceedings of the 2nd Int. Symp. on Two-Phase Flow Modelling and Experimentation, Pisa, May 23–26, (1999).
• F. Groeneweg, W.G.M. Agterof, Ph.T. Jaeger, J.J.M. Janssen, J.A. Wieringa, J.K. Klahn: On the Mechanism of the Inversion of Emulsions, Trans IChemE 76 (1998) A, 55–63.
• Ph.T. Jaeger, R. Eggers: Interfacial Properties and Mass Transfer in Supercritical Fluid Extraction, 4th Int. Symp. on Supercritical Fluids in Sendai, Japan, May 11–14 (1997), 711–714.
• Ph.T. Jaeger, J.v. Schnitzler, R. Eggers: Interfacial Tension of Fluid Systems Considering the Non-stationary Case with Respect to Mass Transfer, Chem. Eng. Technol. 19 (1996), 197–202.
• R. Eggers, H. Wagner, Ph.T. Jaeger: Extraction of Spray Particles with Supercritical Fluids, Proc. 3rd Int. Symp. on High Pressure Chem. Engineering, Zurich, Oct. (1996).
• T. Langmaack, Ph.T. Jaeger, R. Eggers: The Refining of Vegetable Oils by Countercurrent Extraction with Compressed Carbon Dioxide, Fett/Lipid 98 (1996) 7/8, 261–267.
• Ph.T. Jaeger, J.J.M. Janssen, F. Groeneweg, W.G.M. Agterof: Coalescence in Emulsions Containing Inviscid Drops with High Interfacial Mobility, Coll. Surf. 85 (1994) A, 255–264.
• R. Eggers, Ph.T. Jaeger: The Influence of Interfacial Phenomena on Mass Transfer and Process Control in Countercurrent Columns with Supercritical CO₂, Heat and Mass Transfer 29 (1994), 373–377.
• Ph.T. Jaeger, R. Eggers: Wetting of contact surfaces with fluid phases under elevated pressures, Chem.-Ing.-Tech., 66 (1994) 3, 390–393.