Advective diffusive/dispersive transport in geochemical processes

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Comprehensive understanding of chemical transport in response to fluid flow and diffusion in geologic processes requires thermodynamic and transport properties of a wide variety of aqueous species at the temperature and pressure of interest, as well as mass transfer computer codes that provide simultaneously for fluid flow, diffusion, dispersion, homogeneous chemical reactions, and mineral solubilities. As a result of research carried out with support from DOE in prior years of this grant, considerable progress has been made in developing computer codes to calculate advective-dispersive-diffusional transport at both high and low pressures and temperatures. These codes have become highly sophisticated, but ... continued below

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Medium: P; Size: Pages: (42 p)

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Helgeson, H.C. May 28, 1991.

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Description

Comprehensive understanding of chemical transport in response to fluid flow and diffusion in geologic processes requires thermodynamic and transport properties of a wide variety of aqueous species at the temperature and pressure of interest, as well as mass transfer computer codes that provide simultaneously for fluid flow, diffusion, dispersion, homogeneous chemical reactions, and mineral solubilities. As a result of research carried out with support from DOE in prior years of this grant, considerable progress has been made in developing computer codes to calculate advective-dispersive-diffusional transport at both high and low pressures and temperatures. These codes have become highly sophisticated, but their application to geochemical processes is limited by the availability of thermodynamic and transport data for the major solute species in the aqueous phase. Over the past three years, research has been directed primarily toward characterizing the thermodynamic behavior of concentrated supercritical aqueous electrolyte solutions and predicting the diffusion coefficients of organic species in oil field brines. Related research has been concerned with characterizing the growth rate of hydrothermal alteration zones and assessing the relative importance of aqueous diffusion and heterogeneous reactions at mineral surfaces in geochemical processes. 103 refs., 12 figs.

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Medium: P; Size: Pages: (42 p)

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OSTI; NTIS; GPO Dep.

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  • Other: DE91013156
  • Report No.: DOE/ER/13419-T1
  • Grant Number: FG03-85ER13419
  • DOI: 10.2172/5717404 | External Link
  • Office of Scientific & Technical Information Report Number: 5717404
  • Archival Resource Key: ark:/67531/metadc1093034

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  • May 28, 1991

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  • Feb. 10, 2018, 10:06 p.m.

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  • Feb. 22, 2018, 7:22 p.m.

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Helgeson, H.C. Advective diffusive/dispersive transport in geochemical processes, report, May 28, 1991; United States. (digital.library.unt.edu/ark:/67531/metadc1093034/: accessed September 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.