Ozone Solubility in Liquids

Biń, A. K.

doi:10.1080/01919510600558635

Cited by 90 publications

(34 citation statements)

References 30 publications

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“…The solubility of O 3 tends to increase slightly with decreasing polarity of the solvent. 41 If the solubility changes due to the presence of shikimic acid, H should therefore increase (''salting in''). We chose the Henry constant of O 3 in acetic acid 41 to calculate the upper bound for this effect.…”

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confidence: 99%

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Shikimic acid ozonolysis kinetics of the transition from liquid aqueous solution to highly viscous glass

Steimer

Berkemeier

Gilgen

et al. 2015

Phys. Chem. Chem. Phys.

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Ageing of particulate organic matter affects the composition and properties of atmospheric aerosol particles. Driven by temperature and humidity, the organic fraction can vary its physical state between liquid and amorphous solid, or rarely even crystalline. These transitions can influence the reaction kinetics due to limitations of mass transport in such (semi-) solid states, which in turn may influence the chemical ageing of particles containing such compounds. We have used coated wall flow tube experiments to investigate the reaction kinetics of the ozonolysis of shikimic acid, which serves as a proxy for oxygenated, water-soluble organic matter and can form a glass at room temperature. Particular attention was paid to how the presence of water influences the reaction, since it acts a plasticiser and thereby induces changes in the physical state. We analysed the results by means of a traditional resistor model, which assumes steady-state conditions. The ozonolysis rate of shikimic acid is strongly increased in the presence of water, a fact we attribute to the increased transport of O-3 and shikimic acid through the condensed phase at lower viscosities. The analysis using the resistor model suggests that the system undergoes both surface and bulk reaction. The second-order rate coefficient of the bulk reaction is 3.7 (+1.5/-3.2) x 10(3) L mol(-1) s(-1). At low humidity and long timescales, the resistor model fails to describe the measurements appropriately. The persistent O-3 uptake at very low humidity suggests contribution of a self-reaction of O-3 on the surface

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confidence: 99%

“…41 If the solubility changes due to the presence of shikimic acid, H should therefore increase (''salting in''). We chose the Henry constant of O 3 in acetic acid 41 to calculate the upper bound for this effect. To estimate a lower limit of the Henry constant, we chose the lowest value for…”

mentioning

confidence: 99%

Shikimic acid ozonolysis kinetics of the transition from liquid aqueous solution to highly viscous glass

Steimer

Berkemeier

Gilgen

et al. 2015

Phys. Chem. Chem. Phys.

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“…This analysis sparked numerous questions about which mechanisms are involved in this phenomenon. Analyzing the variables involved in the process, different studies have reported a significant difference in solubility of ozone and oxygen (Bin, 2006;Bocci et al, 2011a) when dissolved in water at normal temperature and pressure, and this difference according to our analysis the most plausible answer to explain this result. Bin (2006) also presented several relationships between different expressions of the solubility of ozone in liquids.…”

Section: Discussionmentioning

confidence: 50%

“…Several models have been proposed to describe the transfer of ozone from the gas phase to the liquid phase (Bin, 2006). Generally, these models postulate that the concentration in both phases is homogeneous, except in the gas-liquid interface area.…”

Section: Methodsmentioning

confidence: 99%

Dissolved ozone in biological fluid monitored by optical device operating in the red-infrared region

Carvalho

Melo

Lima

et al. 2014

Rev. Bras. Eng. Bioméd.

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Introduction: When a gas is used for therapy, often the kinetic behavior and their distribution in biological systems is not known, leading to unsatisfactory results for clinical application. The use of ozone in living organisms has been scientifically released worldwide under the name of ozone therapy. The efficacy of this technique is determined primarily by the diffusion of gas within the tissues or fluids and which determines their action in the entire target region. We propose the development of technique to monitoring the O 3 dissolved in the biological fluid using an optical device operating in the red-infrared region. Methods: The recombination of O 3 in O 2 enables the monitoring of the latter by the measurement of SpO 2 , and, based on this phenomenon, we propose to use an optical device operating in the red-infrared region to monitoring indirectly the diffusion of O 3 in fluids. The system was based on optomechanical arrangement using a capsule containing fluid that was ozonated or oxygenated during the process. A pulse oximeter is a noninvasive device used for continuously measure of SpO 2 resulting from the recombination of ozone. Results: The measurements of SpO 2 when subjected to ozone and oxygen, showed an increased rate of SpO 2 function of time for both cases reaching its peak in 80s and 160s, respectively. The experimental data concerning the SpO 2 saturation as a function of time can be fitted by the theoretical model, showing a good correlation between them. Conclusion: A technique was developed using an optical device operating in the red-infrared region to monitoring ozone dissolved in biological fluid, showing a simple and effective way to indirectly monitoring the presence of ozone in fluids.

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“…8, the mass-transfer rate in physical absorption is sensitive to the value of the ozone Henry's law constant whose the value is controversial in the specialized literature. 29,45 The International Ozone Association recommends to calculate H as a function of the temperature between 0 and 60°C through Eq. 23:…”

Section: Kl Calculationmentioning

confidence: 99%

Assessment of a Stirred-Cell Reactor Operated Semicontinuously for the Kinetic Study of Fast Direct Ozonation Reactions by Reactive Absorption

Dang

Biard

Couvert

2016

Ind. Eng. Chem. Res.

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A jacketed stirred-cell reactor, operated semi-continuously, was used to assess the kinetics of fast ozonation reactions by reactive absorption. The method was applied to the direct ozone reaction with resorcinol. A high resorcinol concentration was used to reach a steady state and to neglect the byproducts accumulation. Thus, the mass-transfer rate, and consecutively the reaction rate, were deduced from the ozone mass balance in the gas phase. The gas-phase and liquid-phase mass-transfer coefficients were previously measured directly through the ozone absorption in appropriated conditions. The results emphasized the high sensitivity of the reaction rate constant to the ozone physicochemical properties, especially its solubility, which is controversial in the literature. Therefore, several correlations used to calculate the ozone solubility in water were considered to calculate the second-order reaction rate constant, which varied from 3.57-4.68 10 5 L mol -1 s -1 at 20°C to 9.50-12.2 10 5 L mol -1 s -1 at 35°C. The activation energy was in the range 35-59 kJ mol -1 depending on the considered ozone solubility correlation. A sensitivity analysis is provided to assess the influence of the experimental conditions and ozone physicochemical properties on the model. Finally, the applicability of this method is thoroughly discussed.2

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Ozone Solubility in Liquids

Cited by 90 publications

References 30 publications

Shikimic acid ozonolysis kinetics of the transition from liquid aqueous solution to highly viscous glass

Shikimic acid ozonolysis kinetics of the transition from liquid aqueous solution to highly viscous glass

Dissolved ozone in biological fluid monitored by optical device operating in the red-infrared region

Assessment of a Stirred-Cell Reactor Operated Semicontinuously for the Kinetic Study of Fast Direct Ozonation Reactions by Reactive Absorption

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