A spectrophotometric study of hydrogen sulphide ionisation in aqueous solutions to 350°C

Suleimenov, O.M.; Seward, Terry M.

doi:10.1016/s0016-7037(97)00291-3

Cited by 116 publications

(59 citation statements)

References 22 publications

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“…produce results consistent with the measurements to 150°C of Kryukov and Starostina (1978), Tsonopoulos et al (1976), andSretenskaya (1977), Ellis and Giggenbach (1971), and Suleimenov and Seward (1997); however, results deviate from the two studies which measured the equilibrium constant for reaction (19) at higher temperatures Giggenbach, 1971 andSeward, 1997). Although the results of Ellis and Giggenbach (1971) are suspect because their equilibrium constant for reaction (19) exhibits an inversion of curvature inconsistent with an increasing degree of association observed for most ions at higher temperatures, there are no clear reasons for dismissing the 0.4 logarithmic difference at 350°C between Shock and Helgeson (1988) and Suleimenov and Seward (1997).…”

Section: Hs -1supporting

confidence: 91%

“…Although the results of Ellis and Giggenbach (1971) are suspect because their equilibrium constant for reaction (19) exhibits an inversion of curvature inconsistent with an increasing degree of association observed for most ions at higher temperatures, there are no clear reasons for dismissing the 0.4 logarithmic difference at 350°C between Shock and Helgeson (1988) and Suleimenov and Seward (1997). show the new predictions for the equilibrium constant, standard partial molal heat capacity, and standard partial molal volume, respectively.…”

Section: Hs -1mentioning

confidence: 88%

“…show the new predictions for the equilibrium constant, standard partial molal heat capacity, and standard partial molal volume, respectively. Although prediction of the equilibrium constant and standard partial molal volume are improved over the predictions of Shock and Helgeson (1988), predictions for the standard partial molal heat capacity are worse, emphasizing a fundamental incompatibility between the measurements of Barbero et al (1982), Suleimenov and Seward (1997), and the HKF equation of state model for ions (Tanger and Helgeson, 1988).…”

Section: Hs -1mentioning

confidence: 99%

“…Although the experimental techniques of Barbero et al (1982) are relatively standard, Suleimenov and Seward (1997) admitted great difficulty in dealing with their dilute H 2 S 0 solutions, with any hydrogen sulfide loss due to volatility or corrosion leading to erroneous results. Similarly, recent molecular dynamics studies of Driesner et al (1998) Based on the close match between Suleimenov and Seward (1997) and other studies where experimental data are available, it was decided in this investigation to accept the HKF equation of state derived using the method outlined above, pending future investigations clarifying this issue.…”

Section: Hs -1mentioning

confidence: 99%

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The Hydrothermal Chemistry of Gold, Arsenic, Antimony, Mercury and Silver

Bessinger¹,

Apps²

2003

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A comprehensive thermodynamic database based on the Helgeson-Kirkham-Flowers (HKF) equation of state was developed for metal complexes in hydrothermal systems. Because this equation of state has been shown to accurately predict standard partial molal thermodynamic properties of aqueous species at elevated temperatures and pressures, this study provides the necessary foundation for future exploration into transport and depositional processes in polymetallic ore deposits. The HKF equation of state parameters for gold, arsenic, antimony, mercury, and silver sulfide and hydroxide complexes were derived from experimental equilibrium constants using nonlinear regression calculations. In order to ensure that the resulting parameters were internally consistent, those experiments utilizing incompatible thermodynamic data were re-speciated prior to regression.Because new experimental studies were used to revise the HKF parameters for H 2 S 0 and HS -1 , those metal complexes for which HKF parameters had been previously derived were also updated. It was found that predicted thermodynamic properties of metal complexes are consistent with linear correlations between standard partial molal thermodynamic properties. This result allowed assessment of several complexes for which experimental data necessary to perform regression calculations was limited.Oxygen fugacity-temperature diagrams were constructed from predicted thermodynamic properties to illustrate how thermodynamic data can be used to understand the transport and deposition of metals in hydrothermal systems such as the Carlin-type gold deposits. Assuming a linear relationship between temperature and pressure, metals are predicted to predominantly be transported as sulfide complexes at a total aqueous sulfur concentration of 0.05 m. Also, the presence of arsenic and antimony mineral phases in the deposits are shown to restrict mineralization within a limited range of chemical conditions. Finally, at a lesser aqueous sulfur concentration of 0.01 m, host rock sulfidation can explain the origin of arsenic and antimony minerals within the paragenetic sequence.2

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Section: Hs -1supporting

confidence: 91%

Section: Hs -1mentioning

confidence: 88%

Section: Hs -1mentioning

confidence: 99%

Section: Hs -1mentioning

confidence: 99%

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The Hydrothermal Chemistry of Gold, Arsenic, Antimony, Mercury and Silver

Bessinger¹,

Apps²

2003

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“…commun., 1995) extrapolated to 0 Mg, with activity of species and high-temperature pH calculated using SOLMINEQ.88 (Kharaka et al 1988). Solubility was calculated using the EQBRM code (Anderson & Crerar 1993) with thermodynamic data from Benning & Seward (1996), Sverjensky et al (1997), Suleimenov & Seward (1997), Johnson et al (1992), and Zotov et al (1985Zotov et al ( , 1991. SVP: saturated vapor pressure.…”

Section: Transport Of Gold In Seafloor Hydrothermal Systemsmentioning

confidence: 99%

Geochemistry and Mineralogy of Gold-Rich Hydrothermal Precipitates From the Eastern Manus Basin, Papua New Guinea

Moss

Scott

2001

The Canadian Mineralogist

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Three of the five hydrothermal vent fields currently known in the Manus back-arc basin of Papua New Guinea are enriched in gold. Samples of precipitates from the PACMANUS and Susu Knolls hydrothermal fields in eastern Manus Basin contain up to 56.8 ppm gold, and average 11.3 ± 13 (1) ppm (n = 103). Chimney samples dominated by sphalerite, barite and chalcopyrite have significantly higher contents of gold than sulfide-poor samples. Gold in the sulfide chimneys occurs as micrometric grains of silver-poor (1.4 to 4.2 wt.% Ag) native gold in three distinct associations. In copper-rich chimney samples, gold occurs as inclusions in chalcopyrite associated with tennantite, bornite and covellite. In zinc-rich chimney samples, gold is present mainly as inclusions in tennantite associated with chalcopyrite and sphalerite. A high activity of sulfur is indicated for the gold-rich eastern Manus Basin precipitates by the sulfide assemblages, the low iron content of sphalerite (average = 2.3 ± 3 mole % FeS), and the silver-poor nature of gold grains. Evaluation of possible complexes of gold indicates that AuHS° is the dominant complex, which is consistent with the high activity of sulfur in the hydrothermal system. According to available experimental data, AuHS° is the dominant complex up to 325°C. This complex thus is the only one required for gold enrichment in both the Zn-Au and the Cu-Au associations. Gold transport as the AuHS° complex is likely to be equally important in other seafloor hydrothermal systems with acidic end-member hydrothermal fluids.

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Corrosion Inhibitors for Sour Oilfield Environment (H₂SCorrosion)

Umoren

Solomon

Saji

2020

Corrosion Inhibitors in the Oil and Gas Industry

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Lower-grade steel materials are the most commonly used construction materials for oil and gas wells due to their low cost and high performance. However, they are susceptible to corrosion when they come in contact with corrosive environments that are highly acidic. In oil wells, particularly deep oil wells, hydrogen sulfide (H2S) is commonly found. The dissolution of H2S gas in produced water makes the fluid corrosive. The use of corrosion inhibitors is perhaps the most practical and costeffective means of controlling corrosion of low carbon steels in the sour environment. In this chapter, typical corrosion inhibitors used in oil and gas fields to control the internal corrosion of oilfield equipment caused by H2S are being examined. The inhibitors found to be effective are polar functional compounds, with many being based on nitrogen-containing compounds, such as amines, imidazolines, and quaternary ammonium salts. Drawbacks of these compounds in practical applications and potentials of future developments are discussed.

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A spectrophotometric study of hydrogen sulphide ionisation in aqueous solutions to 350°C

Cited by 116 publications

References 22 publications

The Hydrothermal Chemistry of Gold, Arsenic, Antimony, Mercury and Silver

The Hydrothermal Chemistry of Gold, Arsenic, Antimony, Mercury and Silver

Geochemistry and Mineralogy of Gold-Rich Hydrothermal Precipitates From the Eastern Manus Basin, Papua New Guinea

Corrosion Inhibitors for Sour Oilfield Environment (H₂SCorrosion)

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A spectrophotometric study of hydrogen sulphide ionisation in aqueous solutions to 350°C

Cited by 116 publications

References 22 publications

The Hydrothermal Chemistry of Gold, Arsenic, Antimony, Mercury and Silver

The Hydrothermal Chemistry of Gold, Arsenic, Antimony, Mercury and Silver

Geochemistry and Mineralogy of Gold-Rich Hydrothermal Precipitates From the Eastern Manus Basin, Papua New Guinea

Corrosion Inhibitors for Sour Oilfield Environment (H2SCorrosion)

Contact Info

Product

Resources

About

Corrosion Inhibitors for Sour Oilfield Environment (H₂SCorrosion)