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Measurements of the Distribution of Solutes between Liquid Water and Steam

Description: Direct measurements of the concentration of solutes in both liquid and steam phases in equilibrium with each other have been made in a static mode utilizing a platinum-lined autoclave to a maximum of 350 deg C. Partitioning constants were derived from these measurements based on existing experimental or estimated values of the stoichiometric mean activity coefficients for the solutes in the liquid phase. Independent measurements of the conductance of some of the solutes in dilute aqueous soluti… more
Date: December 31, 1997
Creator: Palmer, D. A.; Simonson, J. M. & Ho, P. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Solvent extraction of cesium by substituted crown ethers

Description: The extraction of alkali metal nitrates by 18-crown-6, 21-crown-7, and 24-crown-8 ethers, bearing cyclohexano, benzo-, t-alkylbenzo, and furano- substituents, in 1,2-dichloroethane has been surveyed. Introduction of a furano substituent onto the macrocyclic ring of 18-crown-6 or 21 crown-7 ethers causes a significant reduction in both extraction efficiency and selectivity. Addition of an additional benzo group to dibenzo-21 -crown-7, to give tribenzo-21 -crown-7, decreases both extraction effic… more
Date: December 31, 1996
Creator: Sachleben, R. A.; Deng, Y.; Palmer, D. A. & Moyer, B. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Measurement and control of pH in hydrothermal solutions

Description: Hydrogen-electrode concentration cells with liquid junction are routinely used to measure the pH of aqueous solutions from 0 to 300 C. Results include the dissociation constants of common acids and bases and the hydrolysis and complexation of metal ions in aqueous electrolytes over a wide range of salinities. Recently, we have utilized these cells to examine the sorption of H{sup +} on mineral surfaces, the solubility of minerals with continuous in situ pH measurement, and the thermal decomposi… more
Date: December 31, 1995
Creator: Wesolowski, D. J.; Palmer, D. A. & Mesmer, R. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Partitioning of solutes between liquid water and steam in the system {l_brace}Na-NH{sub 4}-NH{sub 3}-H-Cl{r_brace} to 350{degree}C

Description: Measurements have been made of the partitioning of solutes between liquid and vapor phases for hydrochloric acid and chloride salts found in both power plant steam cycles and in natural geothermal systems. Static sampling of equilibrium liquid and vapor phases extended from 350 C to the lowest temperatures for which reliable analytical determinations of vapor-phase solute concentrations could be made. Equilibrium constants for the partitioning of the various solutes were calculated from the mea… more
Date: December 31, 1994
Creator: Simonson, J. M. & Palmer, D. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Potentiometric studies at ORNL with hydrogen electrode concentration cells

Description: The absence of suitably stable reference electrodes for and to 300 C led ORNL to develop hydrogen electrode concentration cells for studies of equilibria of interest in reactor and steam generator systems to about 300 C during the late 1960`s and seventies. During the intervening two dozen years over twenty scientists have participated in potentiometric studies at Oak Ridge and much of that work will be summarized in this paper. A description of hydrogen electrode concentration cells developed … more
Date: December 31, 1994
Creator: Mesmer, R. E.; Palmer, D. A. & Wesolowski, D. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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