Distribution ofB(OH)3between water and steam at high temperatures

Kukuljan, J.A.; Alvarez, Jorge L.; Fernández‐Prini, Roberto

doi:10.1006/jcht.1999.0552

Cited by 28 publications

(15 citation statements)

References 12 publications

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“…This empirical expression is similar to that utilized to describe the thermodynamic behavior of dissolved boron in the water-steam system (Kukuljan and Alvarez 1999). The conservative behavior of boron during phase separation is refl ected in the D B/Cl -ρ rd relationship, but can also be shown by the linear 1:1 correlation between B/Cl ratio and Cl over a wide range of chemical and physical conditions, although these data are dependent on fl uid compositional constraints induced prior to phase separation processes (Foustoukos and Seyfried 2007a).…”

Section: Elemental Partitioning Between Vaporliquid and Vapor-halitementioning

confidence: 93%

Fluid Phase Separation Processes in Submarine Hydrothermal Systems

Foustoukos

Seyfried

2007

Reviews in Mineralogy and Geochemistry

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Section: Elemental Partitioning Between Vaporliquid and Vapor-halitementioning

confidence: 93%

Fluid Phase Separation Processes in Submarine Hydrothermal Systems

Foustoukos

Seyfried

2007

Reviews in Mineralogy and Geochemistry

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“…To our knowledge, this study provides the first measurement using in situ XAFS spectroscopy of both Sb vapour-liquid partitioning and its speciation in a two-phase salt-water system pertinent to natural hydrothermal-magmatic settings. The available data on vapour-liquid partition coefficients (expressed in the molality scale) of Sb III and other chemically similar metalloids (Si, B, As) in the two-phase H 2 O-NaCl(-HCl) system obtained over a wide temperature range (250À500ºC) using hydrothermal batch-reactor techniques (Styrikovich et al, 1960;Kukuljan et al, 1999;Pokrovski et al, 2002, 2005b, Leibscher et al, 2005Foustoukos and Seyfried, 2007) are summarized in Fig. 5 as a function of the FIG.…”

Section: Comparison With Available Data and Geological Implicationsmentioning

confidence: 99%

In situ X-ray absorption spectroscopy measurement of vapour-brine fractionation of antimony at hydrothermal conditions

Pokrovski¹,

Roux²,

Hazemann³

et al. 2008

Mineral. mag.

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Despite the growing geological evidence that fluid boiling and vapour-liquid separation affect the distribution of metals in magmatic-hydrothermal systems significantly, there are few experimental data on the chemical status and partitioning of metals in the vapour and liquid phases. Here we report on an in situ measurement, using X-ray absorption fine structure (XAFS) spectroscopy, of antimony speciation and partitioning in the system Sb2O3-H2O-NaCl-HCl at 400°C and pressures 270—300 bar corresponding to the vapour-liquid equilibrium. Experiments were performed using a spectroscopic cell which allows simultaneous determination of the total concentration and atomic environment of the absorbing element (Sb) in each phase. Results show that quantitative vapour-brine separation of a supercritical aqueous salt fluid can be achieved by a controlled decompression and monitoring the X-ray absorbance of the fluid phase. Antimony concentrations in equilibrium with Sb2O3 (cubic, senarmontite) in the coexisting vapour and liquid phases and corresponding SbIII vapour-liquid partitioning coefficients are in agreement with recent data obtained using batch-reactor solubility techniques. The XAFS spectra analysis shows that hydroxy-chloride complexes, probably Sb(OH)2Cl0, are dominant both in the vapour and liquid phase in a salt-water system at acidic conditions. This first in situ XAFS study of element fractionation between coexisting volatile and dense phases opens new possibilities for systematic investigations of vapour-brine and fluid-melt immiscibility phenomena, avoiding many experimental artifacts common in less direct techniques.

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“…7, far away from the critical point of water. Vapor-liquid distribution constants for 1-octene, ammonia, and boric acid are taken from Economou et al (1997);Jones (1963); and Kukuljan et al (1999), respectively. Fig.…”

Section: Thermodynamics Of Vapor-liquid Distribution Of Solutes In Watermentioning

confidence: 99%