Laser-Spectroscopic Measurement of Uptake Coefficients of Trace Gaseous Species on Aqueous Surfaces.

Shimono, Akio; Koda, Seiichiro

doi:10.1252/jcej.28.779

Cited by 7 publications

(8 citation statements)

References 9 publications

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“…There was an apparent sharp dropoff in uptake above 50 wt % acid, with values of 0.04 (+0.06/-0.04) and 0.25 (+0.05/-0.04) measured for 56.0 and 65.0 wt %, respectively. Hanson suggests that his large uptake coefficients measured for CH 3 SO 3 H at low acid concentrations (7.2-20 wt %) are not compatible with those of the two temperature dependent studies on pure water obtained in the droplet train flow reactor studies 78,79 decribed above and shown in Table 2.…”

Section: Uptake Of Sulfuric Acid Vapor and Related Compoundsmentioning

confidence: 80%

“…In the impinging flow technique, a gas flow containing the trace species is directed coaxially from above onto a continuously renewed liquid surface generated by the liquid flowing upward through an open-ended tube. , The spatial distribution of the gas-phase trace species is measured with laser-induced fluorescence. The uptake coefficient is determined from the gradient in the trace species concentration above the liquid surface.…”

Section: 9 Impinging Flow Techniquementioning

confidence: 99%

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Mass Accommodation and Chemical Reactions at Gas−Liquid Interfaces

et al. 2006

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Section: Uptake Of Sulfuric Acid Vapor and Related Compoundsmentioning

confidence: 80%

Section: 9 Impinging Flow Techniquementioning

confidence: 99%

Mass Accommodation and Chemical Reactions at Gas−Liquid Interfaces

et al. 2006

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“…The principle of the impinging flow method and how to determine the uptake coefficients will be briefly explained in the following (a) and (b) sections. A more detailed description is available elsewhere . The experimental setup and procedure are shown in (c) and (d).…”

Section: Methodsmentioning

confidence: 99%

“…Applying the boundary layer theory, u ( r ) and ν( z ) are derived from the governing eqs for continuity and momentum with introducing the boundary layer function and the stream function in the usual manner. , Then eq 1 is switched to a one-dimensional problem on the central z axis by substituting r = 0 and is solved by a finite deference method by employing the value of ν( z ) at each point. Detailed procedure is found elsewhere …”

Section: Methodsmentioning

confidence: 99%

Laser-Spectroscopic Measurements of Uptake Coefficients of SO₂ on Aqueous Surfaces

and

Koda

1996

J. Phys. Chem.

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The uptake of SO 2 on aqueous surfaces was studied by directly measuring SO 2 concentration distribution above the surface by means of laser-induced fluorescence method in an impinging flow field with a 10-100 ms order contact time between the gas flow containing SO 2 and the water flow. The uptake coefficient was determined by using the eq which describes the boundary condition at the surface. The uptake coefficient increased with pH of the aqueous phase and reached the limiting value of 0.028 ( 0.010 at pH ) 13.2 at 293.5 K. Its temperature dependence was slightly negative. The present uptake coefficients could be understood satisfactorily by taking into account the rapid acid-dissociation reaction of dissolved SO 2 with the reported bulk reaction rate constant.

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“…Optical methods can also be employed to investigate interfacial mass transport, predominantly in the form of spectroscopic studies. One example is laser-induced fluorescence , which can be used to retrieve uptake coefficients from the measurements of concentration distribution − or from fluorescence spectra combined with a kinetic uptake model. , …”

Section: Measuring Mass Accommodation Coefficientsmentioning

confidence: 99%

Shining New Light on the Kinetics of Water Uptake by Organic Aerosol Particles

et al. 2021

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The uptake of water vapor by various organic aerosols is important in a number of applications ranging from medical delivery of pharmaceutical aerosols to cloud formation in the atmosphere. The coefficient that describes the probability that the impinging gas-phase molecule sticks to the surface of interest is called the mass accommodation coefficient, αM. Despite the importance of this coefficient for the description of water uptake kinetics, accurate values are still lacking for many systems. In this Feature Article, we present various experimental techniques that have been evoked in the literature to study the interfacial transport of water and discuss the corresponding strengths and limitations. This includes our recently developed technique called photothermal single-particle spectroscopy (PSPS). The PSPS technique allows for a retrieval of αM values from three independent, yet simultaneous measurements operating close to equilibrium, providing a robust assessment of interfacial mass transport. We review the currently available data for αM for water on various organics and discuss the few studies that address the temperature and relative humidity dependence of αM for water on organics. The knowledge of the latter, for example, is crucial to assess the water uptake kinetics of organic aerosols in the Earth’s atmosphere. Finally, we argue that PSPS might also be a viable method to better restrict the αM value for water on liquid water.

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Laser-Spectroscopic Measurement of Uptake Coefficients of Trace Gaseous Species on Aqueous Surfaces.

Cited by 7 publications

References 9 publications

Mass Accommodation and Chemical Reactions at Gas−Liquid Interfaces

Mass Accommodation and Chemical Reactions at Gas−Liquid Interfaces

Laser-Spectroscopic Measurements of Uptake Coefficients of SO₂ on Aqueous Surfaces

Shining New Light on the Kinetics of Water Uptake by Organic Aerosol Particles

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Laser-Spectroscopic Measurement of Uptake Coefficients of Trace Gaseous Species on Aqueous Surfaces.

Cited by 7 publications

References 9 publications

Mass Accommodation and Chemical Reactions at Gas−Liquid Interfaces

Mass Accommodation and Chemical Reactions at Gas−Liquid Interfaces

Laser-Spectroscopic Measurements of Uptake Coefficients of SO2 on Aqueous Surfaces

Shining New Light on the Kinetics of Water Uptake by Organic Aerosol Particles

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Product

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Laser-Spectroscopic Measurements of Uptake Coefficients of SO₂ on Aqueous Surfaces