Anomalous fluid properties of carbon dioxide in the supercritical region – Application to geological CO 2 storage and related hazards

• Published in: Environmental Earth Sciences
• Main Authors: Imre, A., Ramboz, Claire, Kraska, T, Deiters, U.K.
• Other Authors: Institut des Sciences de la Terre d'Orléans - UMR7327 (ISTO), Bureau de Recherches Géologiques et Minières (BRGM) (BRGM)-Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS), Thermohydraulics Department, MTA Centre for Energy Research, Institute of Physical Chemistry Cologne, University of Cologne
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2015
• Subjects: CCS; Widom-line; carbon sequestration; [SDU]Sciences of the Universe [physics]; Sleipner; Snøhvit
• Online Access: https://insu.hal.science/insu-01090267; https://insu.hal.science/insu-01090267/document; https://insu.hal.science/insu-01090267/file/Imre-EES-2014.pdf; https://doi.org/10.1007/s12665-014-3716-5

International audience For supercritical fluids there is a wedge-shaped region called Widom region, where several physico-chemical quantities (e.g., compressibility, heat capacities, density, thermal expansivity, speed of sound) show anomalous behaviour. In this paper several Widom lines of supercritical CO 2 have been computed with the Wagner–Span reference equation of state. The locations of the Widom lines are compared with the P–T range of the Snøhvit, Sleipner, Nagaoka and Ketzin reservoirs, which are recently studied for their fitness for CO 2 sequestration, and two natural CO 2 storage analogues, Montmiral in France and Mihályi-Répcelak in Hungary. The potential consequences of leaking CO 2 crossing any of the Widom lines are discussed.