Calculation of the chemical behavior of highly concentrated geothermal brines

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In this report, the authors describe the development of a chemical equilibrium model for hydrothermal waters based on the semiempirical equations of aqueous electrolyte solutions recently introduced by Pitzer and co-workers. Accurate solubility predictions (usually within 5-10% of experimental results) can be made for ionic strengths 0-20m. Comparison with experimental data indicates that a theory parameterized by binary and ternary data can be used to accurately predict solubilities in much more complex mixtures. Mineral solubilities calculated with this model are compared with those calculated from other currently available models. Whereas the predictions are typically within 5%, the ion pairing models ... continued below

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81-85

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Moller-Weare, Nancy & Weare, John H. October 8, 1982.

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Description

In this report, the authors describe the development of a chemical equilibrium model for hydrothermal waters based on the semiempirical equations of aqueous electrolyte solutions recently introduced by Pitzer and co-workers. Accurate solubility predictions (usually within 5-10% of experimental results) can be made for ionic strengths 0-20m. Comparison with experimental data indicates that a theory parameterized by binary and ternary data can be used to accurately predict solubilities in much more complex mixtures. Mineral solubilities calculated with this model are compared with those calculated from other currently available models. Whereas the predictions are typically within 5%, the ion pairing models are substantially in error at low ionic strengths. Recent results parameterizing the H{sub 2}S and SiO{sub 2} systems will be presented.

Physical Description

81-85

Source

  • Proceedings of the Geothermal Engineering Materials (GEM) Program Conference, San Diego, CA, October 6-8, 1982

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  • Report No.: DOE/ET/27026-2-1
  • Report No.: CONF-821075
  • Grant Number: AC02-79ET27026
  • Grant Number: AC03-81SF11503
  • Office of Scientific & Technical Information Report Number: 890113
  • Archival Resource Key: ark:/67531/metadc884433

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • October 8, 1982

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  • Sept. 21, 2016, 2:29 a.m.

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  • Nov. 22, 2016, 9:50 p.m.

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Moller-Weare, Nancy & Weare, John H. Calculation of the chemical behavior of highly concentrated geothermal brines, article, October 8, 1982; United States. (digital.library.unt.edu/ark:/67531/metadc884433/: accessed November 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.