Development of an experimental data base and theories for prediction of thermodynamic properties of aqueous electrolytes and nonelectrolytes of geochemical significance at supercritical temperatures and pressures. Annual performance report
This project is divided into method experimental measurements, theoretical development, and geochemical applications. We have completed experimental volumetric measurements on aqueous solutions of CO{sub 2} H{sub 2}S, CH{sub 4}, NH{sub 3} and B(OH){sub 3} at 25 to 432{degree}C and 280 and 350 bar. A...
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ftosti:oai:osti.gov:10182216 2023-07-30T04:02:55+02:00 Development of an experimental data base and theories for prediction of thermodynamic properties of aqueous electrolytes and nonelectrolytes of geochemical significance at supercritical temperatures and pressures. Annual performance report Wood, R.H. Hnedkovsky, L. Lin, Ching Lung Shock, E.L. 2008-03-06 application/pdf http://www.osti.gov/servlets/purl/10182216 https://www.osti.gov/biblio/10182216 https://doi.org/10.2172/10182216 unknown http://www.osti.gov/servlets/purl/10182216 https://www.osti.gov/biblio/10182216 https://doi.org/10.2172/10182216 doi:10.2172/10182216 37 INORGANIC ORGANIC PHYSICAL AND ANALYTICAL CHEMISTRY 58 GEOSCIENCES CARBON DIOXIDE THERMODYNAMIC PROPERTIES HYDROGEN SULFIDES METHANE AMMONIA BORIC ACID CARBONIC ACID PROGRESS REPORT AQUEOUS SOLUTIONS HIGH PRESSURE TEMPERATURE RANGE 0400-1000 K HYDROTHERMAL SYSTEMS GEOCHEMISTRY DENSITY FREE ENERGY VERY HIGH PRESSURE BUBBLES VOLUME SOLUBILITY ROCK-FLUID INTERACTIONS 2008 ftosti https://doi.org/10.2172/10182216 2023-07-11T11:01:33Z This project is divided into method experimental measurements, theoretical development, and geochemical applications. We have completed experimental volumetric measurements on aqueous solutions of CO{sub 2} H{sub 2}S, CH{sub 4}, NH{sub 3} and B(OH){sub 3} at 25 to 432{degree}C and 280 and 350 bar. A vibrating tube densitometer that allows density measurements near bubble point and also measures the bubble pressure was developed and used to measure densities and bubble pressures of aqueous Co{sub 2}. Heat capacity measurements should be completed by the end of the grant period. Simulations of models for methane in water at temperatures to 1000{degrees}C are in progress. In order to facilitate these free energy calculations the possible errors associated with the calculations have been explored in two papers (Wood, 1991; Wood et al., 1991) and methods of controlling and estimating these errors have been developed. Applications of the new data to geochemical processes is now possible. Efforts have focussed on extracting equilibrium constants for carbonic acid dissociation at supercritical condition from published experiments on mineral equilibria in H{sub 2}0-CO{sub 2} fluids (Boehlke and Shock, 1990; and in prep.). As a result, estimates of pKa for carbonic acid are now available at temperatures from 300 to 750{degrees}C and pressures from 1 to 7 kilobars. They will be combined with {bar V}{sup {degree}} and {bar C}p{sup {degree}} data for CO{sup 2}(aq) to improve geochemical calculations. Other/Unknown Material Carbonic acid SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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ftosti |
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37 INORGANIC ORGANIC PHYSICAL AND ANALYTICAL CHEMISTRY 58 GEOSCIENCES CARBON DIOXIDE THERMODYNAMIC PROPERTIES HYDROGEN SULFIDES METHANE AMMONIA BORIC ACID CARBONIC ACID PROGRESS REPORT AQUEOUS SOLUTIONS HIGH PRESSURE TEMPERATURE RANGE 0400-1000 K HYDROTHERMAL SYSTEMS GEOCHEMISTRY DENSITY FREE ENERGY VERY HIGH PRESSURE BUBBLES VOLUME SOLUBILITY ROCK-FLUID INTERACTIONS |
spellingShingle |
37 INORGANIC ORGANIC PHYSICAL AND ANALYTICAL CHEMISTRY 58 GEOSCIENCES CARBON DIOXIDE THERMODYNAMIC PROPERTIES HYDROGEN SULFIDES METHANE AMMONIA BORIC ACID CARBONIC ACID PROGRESS REPORT AQUEOUS SOLUTIONS HIGH PRESSURE TEMPERATURE RANGE 0400-1000 K HYDROTHERMAL SYSTEMS GEOCHEMISTRY DENSITY FREE ENERGY VERY HIGH PRESSURE BUBBLES VOLUME SOLUBILITY ROCK-FLUID INTERACTIONS Wood, R.H. Hnedkovsky, L. Lin, Ching Lung Shock, E.L. Development of an experimental data base and theories for prediction of thermodynamic properties of aqueous electrolytes and nonelectrolytes of geochemical significance at supercritical temperatures and pressures. Annual performance report |
topic_facet |
37 INORGANIC ORGANIC PHYSICAL AND ANALYTICAL CHEMISTRY 58 GEOSCIENCES CARBON DIOXIDE THERMODYNAMIC PROPERTIES HYDROGEN SULFIDES METHANE AMMONIA BORIC ACID CARBONIC ACID PROGRESS REPORT AQUEOUS SOLUTIONS HIGH PRESSURE TEMPERATURE RANGE 0400-1000 K HYDROTHERMAL SYSTEMS GEOCHEMISTRY DENSITY FREE ENERGY VERY HIGH PRESSURE BUBBLES VOLUME SOLUBILITY ROCK-FLUID INTERACTIONS |
description |
This project is divided into method experimental measurements, theoretical development, and geochemical applications. We have completed experimental volumetric measurements on aqueous solutions of CO{sub 2} H{sub 2}S, CH{sub 4}, NH{sub 3} and B(OH){sub 3} at 25 to 432{degree}C and 280 and 350 bar. A vibrating tube densitometer that allows density measurements near bubble point and also measures the bubble pressure was developed and used to measure densities and bubble pressures of aqueous Co{sub 2}. Heat capacity measurements should be completed by the end of the grant period. Simulations of models for methane in water at temperatures to 1000{degrees}C are in progress. In order to facilitate these free energy calculations the possible errors associated with the calculations have been explored in two papers (Wood, 1991; Wood et al., 1991) and methods of controlling and estimating these errors have been developed. Applications of the new data to geochemical processes is now possible. Efforts have focussed on extracting equilibrium constants for carbonic acid dissociation at supercritical condition from published experiments on mineral equilibria in H{sub 2}0-CO{sub 2} fluids (Boehlke and Shock, 1990; and in prep.). As a result, estimates of pKa for carbonic acid are now available at temperatures from 300 to 750{degrees}C and pressures from 1 to 7 kilobars. They will be combined with {bar V}{sup {degree}} and {bar C}p{sup {degree}} data for CO{sup 2}(aq) to improve geochemical calculations. |
author |
Wood, R.H. Hnedkovsky, L. Lin, Ching Lung Shock, E.L. |
author_facet |
Wood, R.H. Hnedkovsky, L. Lin, Ching Lung Shock, E.L. |
author_sort |
Wood, R.H. |
title |
Development of an experimental data base and theories for prediction of thermodynamic properties of aqueous electrolytes and nonelectrolytes of geochemical significance at supercritical temperatures and pressures. Annual performance report |
title_short |
Development of an experimental data base and theories for prediction of thermodynamic properties of aqueous electrolytes and nonelectrolytes of geochemical significance at supercritical temperatures and pressures. Annual performance report |
title_full |
Development of an experimental data base and theories for prediction of thermodynamic properties of aqueous electrolytes and nonelectrolytes of geochemical significance at supercritical temperatures and pressures. Annual performance report |
title_fullStr |
Development of an experimental data base and theories for prediction of thermodynamic properties of aqueous electrolytes and nonelectrolytes of geochemical significance at supercritical temperatures and pressures. Annual performance report |
title_full_unstemmed |
Development of an experimental data base and theories for prediction of thermodynamic properties of aqueous electrolytes and nonelectrolytes of geochemical significance at supercritical temperatures and pressures. Annual performance report |
title_sort |
development of an experimental data base and theories for prediction of thermodynamic properties of aqueous electrolytes and nonelectrolytes of geochemical significance at supercritical temperatures and pressures. annual performance report |
publishDate |
2008 |
url |
http://www.osti.gov/servlets/purl/10182216 https://www.osti.gov/biblio/10182216 https://doi.org/10.2172/10182216 |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_relation |
http://www.osti.gov/servlets/purl/10182216 https://www.osti.gov/biblio/10182216 https://doi.org/10.2172/10182216 doi:10.2172/10182216 |
op_doi |
https://doi.org/10.2172/10182216 |
_version_ |
1772813783130963968 |