Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1029/2004WR003885
Titel (primär) Mass transfer between a multicomponent trapped gas phase and a mobile water phase: Experiment and theory
Autor Geistlinger, H.; Beckmann, A.; Lazik, D.
Journal / Serie Water Resources Research
Erscheinungsjahr 2005
Department HDG; BOPHY
Band/Volume 41
Heft 11
Seite von W11408
Sprache englisch
Keywords interphase gas transfer; oxygen gas injection; multicomponent kinetic model; velocity-dependent mass transfer; velocity-dependent dispersivity; Saffman's theory
Abstract [1] Gas tracer experiments were carried out in dynamically compressed sediments to investigate the mass transfer between a trapped multicomponent gas phase and a mobile water phase. The saturation state of the column was characterized by three independent methods: (1) by gravimetric measurements, (2) by bromide tracer tests, and (3) by hydraulic conductivity measurements. For inverse modeling a new kinetic model was developed allowing volume change of the entrapped gas. The new kinetic model consistently explains oxygen elution curves, the time evolution of the integral gas saturation, and integral hydraulic conductivity. The sensitivity of three different velocity-dependent mass transfer correlations to the dissolution process was investigated: (1) a classical square-root, single-sphere correlation, ShPe0.5, (2) a multisphere correlation, ShPen (n = 0.5–1.0), and (3) an empirical correlation, ShPe0.8. It was found that all correlations yield nearly the same elution curves for 10 gas tracer experiments with three different two-component gas phases: O2/He, O2/N2, and O2/Ar and for different flow velocities ranging from 5 to 20 m d−1. For all gas tracer experiments a distinct minimum of the longitudinal dispersivity was found during gas dissolution, i.e., in the unsaturated state. For the saturated state we found that the experimental values could be described by Saffman's theory: equation imagepPe ln (Pe) with a normalized mean square root error of 6%.
dauerhafte UFZ-Verlinkung
Geistlinger, H., Beckmann, A., Lazik, D. (2005):
Mass transfer between a multicomponent trapped gas phase and a mobile water phase: Experiment and theory
Water Resour. Res. 41 (11), W11408