Microfluidic approach for studying CO2 solubility in water and brine using confocal Raman spectroscopy

Liu, N.; Aymonier, Cyril; Lecoutre, Carole; Garrabos, Yves; Marre, Samuel

doi:10.1016/j.cplett.2012.09.007

Cited by 76 publications

(59 citation statements)

References 25 publications

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“…Note that Liu et al (2012) pointed out that Raman signals of dissolved CO 2 do not correlate strictly linearly any-more for 1 M NaCl aqueous solution. On the other hand, Caumon et al (2014) pointed out that the salinity effect on the variation of CH 4 /H 2 O peak area ratio as a function of methane concentration is negligible when the salinity is low (< 4 m) and the CH 4 /H 2 O peak area ratio dependence of methane concentration is linear at low methane concentration (< 0.2 m).…”

Section: Spectra Collectionmentioning

confidence: 99%

Measurements of diffusion coefficient of methane in water/brine under high pressure

Chen¹,

Chu²,

Chen³

et al. 2018

Terr. Atmos. Ocean. Sci.

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The diffusion coefficient of methane in water plays an important role in the formation and dissociation of methane hydrate. However, most of the previous studies on the diffusion coefficient of methane in brine are performed at room temperature and low pressures, which is quite different from the formation condition of methane hydrate. In this study, we measure the diffusion coefficient of methane in pure water and brine in capillary tube at 10.3 MPa and temperature ranging from 283.15 to 308.15 K. We use the Raman spectrum to measure the ratio of C-H bound signal of methane to the O-H bound signal of water, to estimate the concentration of methane dissolves in water/brine. The Raman spectrum is collected at different time and different positions away from the liquid-gas interface. Diffusion coefficient is determined by fitting the experimental data with the concentration profiles solved from Fick's second law and semi-infinity boundary condition. By this method, we can evaluate the diffusion coefficient at different temperatures or salinities. The diffusion coefficient of methane in water/brine increases as the temperature increases. The diffusion coefficient of methane in brine is lower than that in pure water. Molecular dynamics (MD) simulation is also performed in this study to calculate the diffusion coefficient of methane in water/brine. The MD results can successfully predict the tendency of temperature effect and adding electrolyte.

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Section: Spectra Collectionmentioning

confidence: 99%

Measurements of diffusion coefficient of methane in water/brine under high pressure

Chen¹,

Chu²,

Chen³

et al. 2018

Terr. Atmos. Ocean. Sci.

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“…Dentro de las principales ventajas de la microfluídica se encuentran, por ejemplo, la transferencia rápida de masa y de calor, menor tiempo de análisis, mayor portabilidad, volúmenes pequeños de reactivos (importante para reactivos caros o peligrosos), la posibilidad de realizar reacciones multi-paso sin exponer a los reactivos intermediarios a las condiciones ambientales, la posibilidad de modificar con alto rendimiento la concentración de reactivos variando su velocidad de flujo y la posibilidad de integrar herramientas analíticas para caracterizaciones en tiempo real. En la última década, la microfluídica ha sido usada con éxito para superar algunos de estos desafíos (Abolhasani et al, 2012;Sun et al, 2011;Tumarkin et al, 2011;Liu et al, 2012;Sauzade et al, 2013;Li et al, 2012).…”

Section: _2: Microfluídica Como Nueva Herramientaunclassified

Lateral movements in Rayleigh–Taylor instabilities due to frontiers. Experimental study

Binda

Fernández

Hasi

et al. 2018

Chaos: An Interdisciplinary Journal of Nonlinear Science

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Lateral movements of the fingers in Rayleigh-Taylor hydrodynamic instabilities at the interface between two fluids are studied. We show that transverse movements appear when a physical boundary is present; these phenomena have not been explained until now. The boundary prevents one of the fluids from crossing it. Such frontiers can be buoyancy driven as, for example, the frontier to the passage of a less dense solution through a denser solution or when different aggregation states coexist (liquid and gaseous phases). An experimental study of the lateral movement velocity of the fingers was performed for different Rayleigh numbers (Ra), and when oscillations were detected, their amplitudes were studied. Liquid-liquid (L-L) and gas-liquid (G-L) systems were analysed. Aqueous HCl and Bromocresol Green (sodium salt, NaBCG) solutions were used in L-L experiments, and CO (gas) and aqueous NaOH, NaHCO, and CaCl solutions were employed for the G-L studies. We observed that the lateral movement of the fingers and finger collapses near the interface are more notorious when Ra increases. The consequences of this, for each experience, are a decrease in the number of fingers and an increase in the velocity of the lateral finger movement close to the interface as time evolves. We found that the amplitude of the oscillations did not vary significantly within the considered Ra range. These results have an important implication when determining the wave number of instabilities in an evolving system. The wave number could be strongly diminished if there is a boundary.

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“…The overall carbonate reaction in solution (water) is following (Forry and Locascio, 2011): 2 À ] is not significant compared to [HCO À 3 ] at the pH level used in this study (smaller than 7), it will not be included in the analysis (Liu et al, 2012). Using these assumptions, liquid pH can be approximated very precisely in the experimental conditions using the following equation:…”

Section: Carbonate Reactionmentioning

confidence: 98%

Modeling carbon dioxide transport in PDMS-based microfluidic cell culture devices

Mäki

Peltokangas

Kreutzer

et al. 2015

Chemical Engineering Science

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Microfluidic approach for studying CO2 solubility in water and brine using confocal Raman spectroscopy

Cited by 76 publications

References 25 publications

Measurements of diffusion coefficient of methane in water/brine under high pressure

Measurements of diffusion coefficient of methane in water/brine under high pressure

Lateral movements in Rayleigh–Taylor instabilities due to frontiers. Experimental study

Modeling carbon dioxide transport in PDMS-based microfluidic cell culture devices

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