Solubilities of oxygen, nitrogen, and carbon dioxide in aqueous alcohol solutions

Tokunaga, Junji

doi:10.1021/je60064a025

Cited by 128 publications

(82 citation statements)

References 2 publications

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“…The results for 25 OC are depicted and compared to the available literature data in Figure 1. The most extensive studies were reported by Tokunaga (7) for temperatures of 0, 20, and 40 O C . His data for low concentrations of methanol and ethanol are high; most of the values are out of the range covered in Figure 1.…”

Section: Results and Dlscusslonmentioning

confidence: 99%

Oxygen solubilities in aqueous alcohol solutions

Kutsche¹,

Gildehaus²,

Schüller³

et al. 1984

J. Chem. Eng. Data

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Oxygen solubltltles in aqueous alcohol solutions were Investigated by Wlnkler's method at temperatures of 15, 25, and 37 O C . Methanol, ethanol, l-propand, I-butanol, and glycerol were employed at concentratlons up to 18 wt %. The relative solubllltks as compared to water decreased wlth decreadng temperature and with lncreaslna chaln length of the alcohols.For estimation of gas solubilities in mixed aqueous solutions of salts and organic substances, in particular for microbial culture media, an empiriil model has been shown to apply ( 1) which is based on "log additivity" of the individual saltlng-out effects:(1) ao/a is the ratio of the gas solubility in water to the one in a mixed solution. ao/a, is the individual ratio for an equally concentrated aqueous solution of component i alone. Instead of the Bunsen coefficients a (volume of gas, reduced to 0 O C and 101.3 kPa, per unit volume of solvent at a gas partial pressure of 101.3 kPa) any proportional solubility measure could be used.For salts and for some organic substances as well, the concentration dependencies can be described by the Sechenov equation:(2)Here c, is the concentration of substance i and K, is a slightly temperature-dependent constant that is specific to the substance and the gas. For small-chain alcohols eq 2 does not hold as even maxima and minima of gas solubility may be encountered with changing alcohol concentration. However, eq 1 stiil applies up to 10 wt % alcohol by introducing measured relative gas solubiliiies (a,/ao) for the particular alcohol concentrations (2). Unfortunately, literature data on oxygen solubilities in low-concentratiOn alcohol solutions are scarce and the available data disagree strongly (1). I t is the purpose of this paper to provide reliable solubility data in the low concentration range.log (ao/a) = c log (ao/a,) log (ao/a,) = K, c, Experlmental SectionThe solutions were prepared from analytical-grade alcohols and distilled water. They were saturated with air in a short jacketed bubbling tower thermostat4 to f0.2 K. Prior to entering the bubbling tower the air passed through another thermostated saturation flask filled with the same solution. Thus, the concentrations as determined by refractometry hardly changed by stripping during the equilibration process. Samples of the saturated solutions were analyzed for their dissolved oxygen content by the Winkler titration method (3). Reproducibility was better than by 1 %. The measured oxygen concentrations, c (mg L-'), were converted to Bunsen coefficients by the following equation:(Y = 101.3c/{106p&(fb + f , -f 1 -P,)(0.2094)1 = 0.3386~/(Pb + P st -P 1 -P 2)where poo (g ~m -~) is the density of oxygen gas (0 OC, 101.3 002t-956a1a411729-02at3$0 1.5010 Table I. Oxwen Solubilities in Water a0 temu. "C obsda lit.* re1 dev. % _ . 15.0 0.0338 0.0342 -1.2 25.0 0.0279 0.0284 -1.8 37.0 0.0235 0.0240 -2.

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Section: Results and Dlscusslonmentioning

confidence: 99%

Oxygen solubilities in aqueous alcohol solutions

Kutsche¹,

Gildehaus²,

Schüller³

et al. 1984

J. Chem. Eng. Data

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“…Enthalpies of solution of several gas molecules [97][98][99][100][101][102][103][104][105][106], anthracene [107], acenaphthene [108,…”

Section: Data Sets and Solute Descriptorsmentioning

confidence: 99%

Enthalpy of solvation correlations for organic solutes and gases dissolved in 2-propanol, 2-butanol, 2-methyl-1-propanol and ethanol

et al. 2011

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Data have been assembled from the published literature on the enthalpies of solvation for 91 organic vapors and gaseous solutes in 2-propanol, for 73 gaseous compounds in 2-butanol, for 85 gaseous compounds in 2-methyl-1-propanol and for 128 gaseous compounds in ethanol. It is shown that an Abraham solvation equation with five descriptors can be used to correlate the experimental solvation enthalpies to within standard deviations of 2.24 kJ/mole, 1.99 kJ/mole, 1.73 kJ/mole and 2.54 kJ/mole for 2-propanol, 2-butanol, 2-methyl-1-propanol and ethanol, respectively. The derived correlations provide very accurate mathematical descriptions of the measured enthalpy of solvation data at 298 K, which in the case of ethanol span a range of 136 kJ/mole. Division of the experimental values into a training set and a test set shows that there is no bias in predictions, and that the predictive capability of the correlations is better than 3.5 kJ/mole.

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“…Calorimetric data was also found for the dissolution of a few gases in tetrahydrofuran [141,142], and for five crystalline organic solutes, ethylene carbonate [143], benzamide [144], benzoic acid [145], 1-bromoadamantane [146] and 1-adamantanol [147], in 1-propanol. Enthalpies of solution of several gas molecules [148][149][150][151][152][153][154][155],…”

Section: Data Sets and Solute Descriptorsmentioning

confidence: 99%

Enthalpy of solvation correlations for organic solutes and gases dissolved in 1-propanol and tetrahydrofuran

et al. 2011

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Data have been assembled from the published literature on the enthalpies of solvation for 103 organic vapors and gaseous solutes in 1-propanol and for 86 gaseous compounds in tetrahydrofuran. It is shown that an Abraham solvation equation with five descriptors can be used to correlate the experimental solvation enthalpies to within standard deviations of 2.35 kJ/mole and 2.10 kJ/mole for 1-propanol and tetrahydrofuran, respectively. The derived correlations provide very accurate mathematical descriptions of the measured enthalpy of solvation data at 298 K, which in the case of 1-propanol span a range of 119 kJ/mole. Division of the experimental values into a training set and a test set shows that there is no bias in predictions, and that the predictive capability of the correlations is better than 3.5 kJ/mole.

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Solubilities of oxygen, nitrogen, and carbon dioxide in aqueous alcohol solutions

Cited by 128 publications

References 2 publications

Oxygen solubilities in aqueous alcohol solutions

Oxygen solubilities in aqueous alcohol solutions

Enthalpy of solvation correlations for organic solutes and gases dissolved in 2-propanol, 2-butanol, 2-methyl-1-propanol and ethanol

Enthalpy of solvation correlations for organic solutes and gases dissolved in 1-propanol and tetrahydrofuran

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