Investigation and prediction of the salting-out effect of methane in various aqueous electrolyte solutions

Kim, Kwangmin; Seo, Kyeongjun; Lee, Jaewon; Kim, Myung‐Gil; Ha, Kwang; Kim, Choongik

doi:10.1016/j.jiec.2015.10.041

Cited by 15 publications

(11 citation statements)

References 40 publications

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“…), Na + salts always have a salting out effect higher than that of NH 4 + salts, in agreement with previous studies for other compounds. 7,8,24 NO 3 − tends to have the lowest salting out effect among all studied anions. Both Gorgeńyi et al 7 and Waxman et al 10 reported nitrate salts having the lowest salting out effect among anions.…”

Section: Environmental Science and Technologymentioning

confidence: 85%

“…) have a larger salting out effect, which agrees with findings in other studies. 7,8,24 For the same cation (Na + or NH 4 + ), SO 4 2− salts have a salting out effect higher than that of Cl − salts, while for the same anion (Cl − or SO 4 2−…”

Section: Environmental Science and Technologymentioning

confidence: 99%

“…The magnitude of the salt effect has been related to the charge density (valency per ionic volume) of the corresponding ions: ions with a bigger charge density have larger hydration shells, and thus exhibit a stronger salting out effect. 8 A similar theory based on the Born equation 31 relates K S with the square of the charge of the ion (z 2 ) and the reciprocal of the radius of the ion (r). 32 The Born equation calculates the Gibbs free energy of solvation (ΔG solv ), i.e., the energy of hydration (ΔG hyd ) in the case of water as solvent, which is negatively proportional to z 2 /r.…”

Section: Environmental Science and Technologymentioning

confidence: 99%

“…Endo et al and Wang et al measured the salting out of a large variety of organic compounds from NaCl and (NH) 2 SO 4 solutions and developed polyparameter linear free energy relationships (pp-LFERs) for the prediction of Setschenow constants of these two salts. While these data sets allow for a systematic comparison of the effect of these two salts, data for other salts are sparse. − In particular, the empirical database is too small to derive information on the relative salt effect of individual ions for a larger set of compounds. Furthermore, except for the group contribution methods based on UNIFAC , and AIOMFAC, which predict activity coefficients of chemical species in inorganic–organic mixtures, no models have been developed specifically for the prediction of the effect for salts other than NaCl and (NH) 2 SO 4 .…”

Section: Introductionmentioning

confidence: 99%

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Effect of Sodium Sulfate, Ammonium Chloride, Ammonium Nitrate, and Salt Mixtures on Aqueous Phase Partitioning of Organic Compounds

Wang

Lei

Wania

2016

Environ. Sci. Technol.

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Always cite the published version, so the author(s) will receive recognition through services that track citation counts, e.g. Scopus. If you need to cite the page number of the author manuscript from TSpace because you cannot access the published version, then cite the TSpace version in addition to the published version using the permanent URI (handle) found on the record page.This article was made openly accessible by U of T Faculty. Please tell us how this access benefits you. Your story matters. phase. This influence is especially significant in atmospheric aerosol, which usually contains 14 large amount of ions, including sodium, ammonium, chloride, sulfate and nitrate. However, 15 empirical data on this salt effect are very sparse. Here, the partitioning of numerous organic 16 compounds into solutions of Na 2 SO 4 , NH 4 Cl and NH 4 NO 3 was measured and compared with 17 existing data for NaCl and (NH 4 ) 2 SO 4 . Salt mixtures were also tested in order to establish 18 whether the salt effect is additive. In general the salt effect showed a decreasing trend of Na 2 SO 4 19 > (NH) 2 SO 4 > NaCl > NH 4 Cl > NH 4 NO 3 for the studied organic compounds, implying the 20 following relative strength of the salt effect of individual anions: SO 4 2-> Cl -> NO 3 -and cations: 21 Na + > NH 4 + . The salt effect of different salts is moderately correlated. Predictive models for the 22 salt effect have been developed based on the experimental data. The experimental data indicate 23 that the salt effect of mixtures may not be entirely additive. However, the deviation from 24 additivity, if it exists, is small. Data of very high quality are required to establish whether the 25 effect of constituent ions or salts is additive or not. 26

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Section: Environmental Science and Technologymentioning

confidence: 85%

Section: Environmental Science and Technologymentioning

confidence: 99%

Section: Environmental Science and Technologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Sodium Sulfate, Ammonium Chloride, Ammonium Nitrate, and Salt Mixtures on Aqueous Phase Partitioning of Organic Compounds

Wang

Lei

Wania

2016

Environ. Sci. Technol.

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“…The cations/anions that dissociate from dissolved salts surround most of the water molecules, and only a few water molecules can interact with CH 4 . 46 , 47 Therefore, the saline water imbibed into the shale matrix during the treatment process is believed to lower CH 4 adsorption. Similar to the literature, 48 , 49 CH 4 adsorption was found to linearly increase with pressure.…”

Section: Resultsmentioning

confidence: 99%

Synergetic Effect of Surfactant Concentration, Salinity, and Pressure on Adsorbed Methane in Shale at Low Pressure: An Experimental and Modeling Study

et al. 2020

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The influence of an anionic surfactant, a cationic surfactant, and salinity on adsorbed methane (CH 4 ) in shale was assessed and modeled in a series of systematically designed experiments. Two cases were investigated. In case 1, the crushed Marcellus shale samples were allowed to react with anionic sodium dodecyl sulfate (SDS) and brine. In case 2, another set of crushed Marcellus shale samples were treated with cetyltrimethylammonium bromide (CTAB) and brine. The surfactant concentration and salinity of brine were varied following the Box–Behnken experimental design. CH 4 adsorption was then assessed volumetrically in the treated shale at varying pressures (1–50 bar) and a constant temperature of 30 °C using a pressure equilibrium cell. Mathematical analysis of the experimental data yielded two separate models, which expressed the amount of adsorbed CH 4 as a function of SDS/CTAB concentration, salinity, and pressure. In case 1, the highest amount of adsorbed CH 4 was about 1 mmol/g. Such an amount was achieved at 50 bar, provided that the SDS concentration is kept close to its critical micelle concentration (CMC), which is 0.2 wt %, and salinity is in the range of 0.1–20 ppt. However, in case 2, the maximum amount of adsorbed CH 4 was just 0.3 mmol/g. This value was obtained at 50 bar and high salinity (∼75 ppt) when the CTAB concentration was above the CMC (>0.029 wt %). The findings provide researchers with insights that can help in optimizing the ratio of salinity and surfactant concentration used in shale gas fracturing fluid.

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Study of the Relationship Between New Ionic Interaction Parameters and Salt Solubility in Electrolyte Solutions Based on Molecular Dynamics Simulation

Sun,

Hu,

Zheng

et al. 2024

J. Ocean Univ. China

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Investigation and prediction of the salting-out effect of methane in various aqueous electrolyte solutions

Cited by 15 publications

References 40 publications

Effect of Sodium Sulfate, Ammonium Chloride, Ammonium Nitrate, and Salt Mixtures on Aqueous Phase Partitioning of Organic Compounds

Effect of Sodium Sulfate, Ammonium Chloride, Ammonium Nitrate, and Salt Mixtures on Aqueous Phase Partitioning of Organic Compounds

Synergetic Effect of Surfactant Concentration, Salinity, and Pressure on Adsorbed Methane in Shale at Low Pressure: An Experimental and Modeling Study

Study of the Relationship Between New Ionic Interaction Parameters and Salt Solubility in Electrolyte Solutions Based on Molecular Dynamics Simulation

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