Experimental determination and prediction of gas solubility data for oxygen in acetonitrile

Horstmann, Sven; Grybat, Andreas; Kato, Ryo

doi:10.1016/j.jct.2004.07.014

Cited by 39 publications

(23 citation statements)

References 11 publications

(16 reference statements)

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“…The dissolution equilibrium of gases is expressed by Henry's law [12]. Reported values of saturated hydrogen gas at 1 atm are 0.56 mM (M = mol dm À3 ) and 0.63 mM, respectively, in 1.1 M aqueous NaCl solution and 0.2 M aqueous BaCl 2 solution [13][14][15]. Henry's law constants or Bunsen absorption coefficients, which determine solubility, have been evaluated from measurements of concentrations in solution and of partial pressures [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Is hydrogen gas in water present as bubbles or hydrated form?

Aoki

Toda

Yamamoto

et al. 2012

Journal of Electroanalytical Chemistry

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a b s t r a c tWhen hydrogen gas is bubbled into water, it may well be present as stabilized bubbles rather than hydrated hydrogen molecules, as in the spontaneous emulsification at oil|water interfaces without surfactant. On this prediction, we used dynamic light scattering (DLS) to find bubbles 0.4-0.5 lm in diameter, which were stable for more than 9 h. The intensity of the scattering light, which was proved to be proportional to concentrations of polystyrene latex suspensions, was also kept in solution in contact with hydrogen gas atmosphere. The bubbles were stable even at 50 g (gravity) by centrifugation. Voltammograms of the bubble-included solution had the oxidation peak, of which current was proportional to the intensity of DLS. Concentration of hydrogen in solution was evaluated accurately by comparing voltammetric currents at a regular electrode and a small electrode. The oxidation of hydrogen should be caused by the hydrated hydrogen which was supplied by dissolution of bubbles. Kinetic data of the dissolution were obtained at microelectrodes by using the advantage of extracting kinetics from diffusion currents. Voltammetric currents at microelectrodes were smaller by 10 times than those predicted from diffusion of hydrated hydrogen. Therefore, the oxidation is controlled by the dissolution rate at the high current density. The rate was estimated to be 2 Â 10 À8 mol s À1 cm À2 , which was converted to the linear transfer rate, 0.4 mm s À1 , at gas|water interface.

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Section: Introductionmentioning

confidence: 99%

Is hydrogen gas in water present as bubbles or hydrated form?

Aoki

Toda

Yamamoto

et al. 2012

Journal of Electroanalytical Chemistry

View full text Add to dashboard Cite

show abstract

“…It is based on the precisely analysis of the composition of both the vapour and the liquid phases after the equilibrium is attained into the equilibrium cell. Different techniques (piezoelectric pressure sensors [5]; pressure transducers [6,7]; differential pressure indicators [8,9], etc.) have been used to perform this analysis for which the big volume required for the samples together with the long time needed to do it, are some of its disadvantages.…”

Section: Introductionmentioning

confidence: 99%

A new electrochemical method for the determination of gas solubility in aqueous solutions

Raposo

Calviño

Esteso

2008

Journal of Electroanalytical Chemistry

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“…(2) and (3) below, since the solution deaeration by blowing pure nitrogen decreased their peak heights significantly. It is worth pointing out that the saturated molar fraction of oxygen in ACN at 1 atm was reported to be 4.15 · 10 À4 [33], namely, the solubility of oxygen in ACN is 7.96 mmol L À1 . In fact, a reaction similar to Eq.…”

Section: Resultsmentioning

confidence: 99%