Quantitative Raman spectroscopic investigation of geo-fluids high-pressure phase equilibria: Part II. Accurate determination of CH4 solubility in water from 273 to 603 K and from 5 to 140 MPa and refining the parameters of the thermodynamic model

Ou, Wenjia; Geng, Lei; Lü, Wanjun; Guo, Hao; Qu, Kang; Mao, Peixiao

doi:10.1016/j.fluid.2015.01.025

Cited by 47 publications

(24 citation statements)

References 48 publications

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“…As an example, we have chosen the NaCl–CH 4 –water system to study the effect of temperature‐ and salinity‐dependent RSCS of the OH‐stretching vibration band of water on the PAR/mCH 4 from Ou et al PAR/mCH 4 can be represented by the following equation:

P A R true/ m C H_{4} = ((), σ_{C H_{4}} true/ σ_{H_{2} O}) true/ ((), 1000 true/ M_{H_{2} O})

…”

Section: Discussionmentioning

confidence: 80%

“…So, the effect of temperature and dissolved NaCl on the RSCS of OH‐stretching vibration band of water was considered in this study. It should be noted that a new method was applied in this study to calculate the value of PAR/mCH 4 which were underestimated by Ou et al resulting from the underestimation of the value of A CH4 (Fig. S1).…”

Section: Discussionmentioning

confidence: 99%

“…S1). So the area difference between the spectrum of methane‐bearing solution from Ou et al and the spectrum of the solution without methane at the same temperature and salinity from this study was employed to calculated the A CH4 . And then the new PAR/mCH 4 was obtained in this study for further comparison and discussion.…”

Section: Discussionmentioning

confidence: 99%

“…Apart from application of Raman spectroscopy to molecular interactions, quantitative analytical application of Raman spectroscopy has been developed successfully in both laboratory and submarine environment at various temperature–salinity–pressure conditions because of its non‐destructive and non‐contact advantages. Indeed, the water stretching Raman band is often used as internal standard in the determination of aqueous dissolved species concentration in the molality scale . In our previous works, Ou et al found that the Raman peak area ratio (PAR = A CH4 / A H2O ) between the stretching bands of methane and water was affected by temperature and salinity, and the effect of dissolved NaCl on the PAR/mCH 4 (mCH 4 the concentration of CH 4 by mol/kg·H 2 O) became more and more significant with increasing temperature.…”

Section: Introductionmentioning

confidence: 99%

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Temperature and salinity effects on the Raman scattering cross section of the water OH-stretching vibration band in NaCl aqueous solutions from 0 to 300 °C

Lü

et al. 2016

J. Raman Spectrosc.

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Water is often used as an internal standard in quantitative Raman spectroscopic measurements of dissolved species in aqueous solutions containing salts at varying temperatures. However, the effects of temperature and dissolved ions on the relative differential Raman scattering cross section (RSCS) of the OH‐stretching vibration band of water at elevated temperatures and salinities are not well defined quantitatively. In this study, the Raman spectra of NaCl solutions with different salinity (from 0 to 5 mol NaCl/kg · H2O) at 20 °C at atmospheric pressure and from 0 to 300 °C at 30 MPa were studied. The relative RSCS of the OH‐stretching vibration band of liquid water (σ(mNaCl, T, 30 MPa)/σ(Pure water, 20 °C, 30 MPa)) as a function of temperature (T, in °C) and salinity (mNaCl, in mol/kg · H2O) was established: σmNaCl,T,30MPatrue/σtrue(Pure water,0.25em20oC,0.25em300.25emMPatrue)=f()T,mNaCl0.25em=a()T−20+b where a = 0.000089 × mNaCl1/2 − 0.001164; b = 0.0355 × mNaCl + 1; The RSCS of the OH‐stretching vibration band of water in pseudo back‐scattering geometry decreases linearly with increasing temperature, but increases with the addition of dissolved NaCl within the whole temperature range. The enhancement factor of the RSCS by dissolved NaCl increases with temperature. Such effects of temperature and salinity should be considered in quantitative Raman spectroscopic study of species concentration in aqueous solution at high temperature when using water as internal standard. Copyright © 2016 John Wiley & Sons, Ltd.

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P A R true/ m C H_{4} = ((), σ_{C H_{4}} true/ σ_{H_{2} O}) true/ ((), 1000 true/ M_{H_{2} O})

…”

Section: Discussionmentioning

confidence: 80%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Temperature and salinity effects on the Raman scattering cross section of the water OH-stretching vibration band in NaCl aqueous solutions from 0 to 300 °C

Lü

et al. 2016

J. Raman Spectrosc.

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“…5,6 Compound, formula, source, and purity of all materials used in the experiments are listed in Table 2. NaCl aqueous solutions were gravimetrically prepared.…”

Section: Methodsmentioning

confidence: 99%

Quantitative Raman Spectroscopic Measurements of CO₂ Solubility in NaCl Solution from (273.15 to 473.15) K at p = (10.0, 20.0, 30.0, and 40.0) MPa

et al. 2015

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The knowledge of high pressure phase behavior of the CO 2 −H 2 O−NaCl system in a wide T−P−m NaCl range is of great interest in the injection of CO 2 to deep reservoir for storage or enhancement of oil recovery (EOR). The calculation of CO 2 solubility in brine is very important to predict the CO 2 storage capacity in saline aquifers. However, CO 2 solubility data at high salinity and high pressure are limited, and few thermodynamic models can accurately predict CO 2 solubility when salinity is higher than 4.5 mol/kg. In this study, a noninvasive technique, quantitative Raman spectroscopy, was used to investigate the high pressure equilibria of the CO 2 −H 2 O−NaCl system. A total of 180 solubility data points were obtained for carbon dioxide in (1, 3, and 5) mol/kg NaCl solutions from (273.15 to 473.15) K up to 40 MPa. New parameters were derived to improve the Duan-type solubility model, thus it can be applied in CO 2 sequestration and EOR to accurately calculate the solubility of CO 2 in NaCl aqueous solution up to 6 mol NaCl/kg H 2 O from (273 to 473) K, (3 to 60) MPa.

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Recycling of phenol from poly (1,4-cyclohexylene dimethylene terephthalate) using subcritical water from 260 to 340 °C

Xie

Bei

et al. 2020

J Mater Cycles Waste Manag

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Quantitative Raman spectroscopic investigation of geo-fluids high-pressure phase equilibria: Part II. Accurate determination of CH4 solubility in water from 273 to 603 K and from 5 to 140 MPa and refining the parameters of the thermodynamic model

Cited by 47 publications

References 48 publications

Temperature and salinity effects on the Raman scattering cross section of the water OH-stretching vibration band in NaCl aqueous solutions from 0 to 300 °C

Temperature and salinity effects on the Raman scattering cross section of the water OH-stretching vibration band in NaCl aqueous solutions from 0 to 300 °C

Quantitative Raman Spectroscopic Measurements of CO₂ Solubility in NaCl Solution from (273.15 to 473.15) K at p = (10.0, 20.0, 30.0, and 40.0) MPa

Recycling of phenol from poly (1,4-cyclohexylene dimethylene terephthalate) using subcritical water from 260 to 340 °C

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Quantitative Raman spectroscopic investigation of geo-fluids high-pressure phase equilibria: Part II. Accurate determination of CH4 solubility in water from 273 to 603 K and from 5 to 140 MPa and refining the parameters of the thermodynamic model

Cited by 47 publications

References 48 publications

Temperature and salinity effects on the Raman scattering cross section of the water OH-stretching vibration band in NaCl aqueous solutions from 0 to 300 °C

Temperature and salinity effects on the Raman scattering cross section of the water OH-stretching vibration band in NaCl aqueous solutions from 0 to 300 °C

Quantitative Raman Spectroscopic Measurements of CO2 Solubility in NaCl Solution from (273.15 to 473.15) K at p = (10.0, 20.0, 30.0, and 40.0) MPa

Recycling of phenol from poly (1,4-cyclohexylene dimethylene terephthalate) using subcritical water from 260 to 340 °C

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Quantitative Raman Spectroscopic Measurements of CO₂ Solubility in NaCl Solution from (273.15 to 473.15) K at p = (10.0, 20.0, 30.0, and 40.0) MPa