Anomalous fluid properties of carbon dioxide in the supercritical region: application to geological CO2 storage and related hazards

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 CO₂have been comp...

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Bibliographic Details
Published in:Environmental earth sciences 2015-04, Vol.73 (8), p.4373-4384
Main Authors: Imre, A. R, Ramboz, C, Deiters, U. K, Kraska, T
Format: Article
Language:English
Subjects:
Biogeosciences
Carbon dioxide
Carbon dioxide fixation
Carbon sequestration
compressibility
Earth and Environmental Science
Earth Sciences
Environmental Science and Engineering
equations
Geochemistry
Geology
heat
Hydrology/Water Resources
Original Article
Terrestrial Pollution
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Summary: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 CO₂have 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 CO₂sequestration, and two natural CO₂storage analogues, Montmiral in France and Mihályi-Répcelak in Hungary. The potential consequences of leaking CO₂crossing any of the Widom lines are discussed.
ISSN:1866-6280
1866-6299
DOI:10.1007/s12665-014-3716-5