Solubility of CO2 in (CH3OH + H2O)

Xia, Jianzhong; Jödecke, Michael; Kamps, and Álvaro Pérez-Salado; Maurer, Gerd

doi:10.1021/je049803i

Cited by 82 publications

(77 citation statements)

References 14 publications

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“…The onset of CO 2 norm, and thus the segregation of a pure phase of CO 2 , takes place at a much smaller value in ASW, indicating a lower miscibility of CO 2 with ASW than with amorphous solid methanol. This result, which parallels the higher solubility of CO 2 in liquid CH 3 OH as compared with liquid water (see, for instance, Xia et al 2004), is not surprising taking into account the relative strength of the various pairwise interactions between the three molecules considered.…”

Section: Estimation Of Co 2 Dist In Co 2 /Ch 3 Oh Ice Mixturessupporting

confidence: 64%

INFRARED SPECTRA AND THERMODYNAMIC PROPERTIES OF CO₂/METHANOL ICES

Maté¹,

Gálvez²,

Herrero³

et al. 2008

ApJ

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Ices of mixtures of carbon dioxide and methanol have been studied in a range of temperatures relevant for starforming regions, comets, polar caps of planets and satellites, and other solar system bodies. We have performed temperature-programmed desorption measurements and recorded IR spectra of various types of samples. The presence of two slightly different structures of CO 2 is manifest. A distorted CO 2 structure is characterized by bandshifts between 5 cm −1 (ν 3 ) and 10 cm −1 (ν 2 ) with respect to normal CO 2 . If the samples are heated above 130 K, the distorted CO 2 sublimates and only the normal structure remains. The latter can stay trapped until the sublimation of crystalline methanol (150 K). The desorption energy (E d ∼ 20 kJ mol −1 ) of CO 2 from methanol ice, and the specific adsorption surface area (6 m 2 g −1 ) of amorphous CH 3 OH ice, have been determined. CO 2 does not penetrate into crystalline ice. Whereas the desorption energy is similar to that of CO 2 /H 2 O samples, the specific surface of methanol is much smaller than that of amorphous solid water (ASW). The interaction of CO 2 molecules with water and methanol is similar but ices of CH 3 OH are much less porous than ASW. The inclusion of CO 2 into previously formed ices containing these two species would take place preferentially into ASW. However, in processes of simultaneous deposition, methanol ice can admit a larger amount of CO 2 than water ice. CO 2 /CH 3 OH ices formed by simultaneous deposition admit two orders of magnitude more CO 2 than sequentially deposited ices. These findings can have direct relevance to the interpretation of observations from protostellar environments (e.g., RAFGL7009S) and comet nuclei.

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Section: Estimation Of Co 2 Dist In Co 2 /Ch 3 Oh Ice Mixturessupporting

confidence: 64%

INFRARED SPECTRA AND THERMODYNAMIC PROPERTIES OF CO₂/METHANOL ICES

Maté¹,

Gálvez²,

Herrero³

et al. 2008

ApJ

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“…For Kumelan et al, the visual synthetic method was used. 31 After a known amount of mixture is put in the equilibrium cell, the pressure or temperature is adjusted until the phase change is observed. For the determination of gas solubility, this apparatus is based on an assumption of little or no liquid dissolution in the vapor phase.…”

Section: Apparatus Verificationmentioning

confidence: 99%

High-pressure phase equilibria with compressed gases

Wei

Scurto

2007

Review of Scientific Instruments

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An apparatus is described that is capable of determining high-pressure vapor-liquid equilibrium, liquid-liquid equilibrium, solid-liquid-vapor equilibrium, vapor-liquid-liquid equilibrium, and mixture critical points and transitions. The device is capable of temperatures to 150°C and pressures to 300bars (higher with slight modifications). The construction and operation are described in detail and do not require the use of mercury. This method requires very low sample volumes and no analytical equipment nor system-specific calibration. The apparatus was verified by comparison with literature data for the decane-CO2 mixture and CO2-ionic liquid [1-hexyl-3-methyl-imidazolium bis(trifyl)imide)] systems. The experimental data have excellent agreement with the literature data that used different experimental methods. A rigorous error analysis of the system is also presented.

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“…Fig. 6 shows a comparison between the experimental data and prediction results for the pressure when carbon dioxide is dissolved in a (water + methanol) mixture which contains 5 mol% of methanol without a salt (Xia et al [71]) as well as 1.7 mol sodium chloride per kg of solvent mixture (Jödecke [70]) at 313, 353, and 393 K. The calculations were performed with presetting the temperature and composition of the liquid phase and calculating the pressure. At 393 K the prediction results for the pressure agree with the experimental data within the experimental uncertainty for both the salt-free as well as for the salt-containing solvent mixture.…”

Section: Prediction Of the Phase Equilibrium Of Quaternary Salt-contamentioning

confidence: 99%

An extension of the Peng–Robinson equation of state for the correlation and prediction of high-pressure phase equilibrium in systems containing supercritical carbon dioxide and a salt

Sieder

Maurer

2004

Fluid Phase Equilibria

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Solubility of CO₂ in (CH₃OH + H₂O)

Cited by 82 publications

References 14 publications

INFRARED SPECTRA AND THERMODYNAMIC PROPERTIES OF CO₂/METHANOL ICES

INFRARED SPECTRA AND THERMODYNAMIC PROPERTIES OF CO₂/METHANOL ICES

High-pressure phase equilibria with compressed gases

An extension of the Peng–Robinson equation of state for the correlation and prediction of high-pressure phase equilibrium in systems containing supercritical carbon dioxide and a salt

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Solubility of CO2 in (CH3OH + H2O)

Cited by 82 publications

References 14 publications

INFRARED SPECTRA AND THERMODYNAMIC PROPERTIES OF CO2/METHANOL ICES

INFRARED SPECTRA AND THERMODYNAMIC PROPERTIES OF CO2/METHANOL ICES

High-pressure phase equilibria with compressed gases

An extension of the Peng–Robinson equation of state for the correlation and prediction of high-pressure phase equilibrium in systems containing supercritical carbon dioxide and a salt

Contact Info

Product

Resources

About

Solubility of CO₂ in (CH₃OH + H₂O)

INFRARED SPECTRA AND THERMODYNAMIC PROPERTIES OF CO₂/METHANOL ICES

INFRARED SPECTRA AND THERMODYNAMIC PROPERTIES OF CO₂/METHANOL ICES