Experimental study of O2 diffusion coefficient measurement at a planar gas-liquid interface by planar laser-induced fluorescence with inhibition
Jimenez, Mélanie and Dietrich, Nicolas and Cockx, Arnaud and Hébrard, Gilles (2013) Experimental study of O2 diffusion coefficient measurement at a planar gas-liquid interface by planar laser-induced fluorescence with inhibition. AIChE Journal, 59 (1). pp. 325-333. ISSN 0001-1541 (https://doi.org/10.1002/aic.13805)
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Abstract
A new method for determining the molecular diffusivity of oxygen in liquids is described. The technique was applied through a flat air-liquid interface in a Hele-Shaw cell (5 × 5 × 0.2 cm3) and was based on planar laser-induced fluorescence (PLIF) with inhibition. A ruthenium complex (C72H48N8O6Ru) was used as the fluorescent dye sensitive to oxygen. A mathematical analysis was developed to determine the molecular diffusivity of oxygen simply by localizing the gas diffusion front. The specificity of this mathematical analysis is that it does not require the properties of the fluids (such as the saturation concentration) to be considered, which is especially relevant for complex media that are sometimes difficult to characterize properly. This technique was applied to three different fluids (viscosities ranging from 1 to 2.4 mPa·s) corresponding to binary diffusion coefficients ranging from 9.5 × 10-10 to 2 × 10-9 m2/s. Experimental data were found with an uncertainty of about 5% and were in good agreement with the literature. Particle image velocimetry and numerical simulations were also carried out to determine the optimal gas flow rate (0.01 L/s) to reach purely diffusive transfer, and the corresponding hydrodynamic profiles of the two phases. copy; 2012 American Institute of Chemical Engineers (AIChE).
ORCID iDs
Jimenez, Mélanie ORCID: https://orcid.org/0000-0002-4631-0608, Dietrich, Nicolas, Cockx, Arnaud and Hébrard, Gilles;-
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Item type: Article ID code: 90165 Dates: DateEvent1 January 2013Published23 March 2012Published Online21 March 2012AcceptedSubjects: Technology > Chemical engineering Department: Faculty of Engineering > Biomedical Engineering Depositing user: Pure Administrator Date deposited: 07 Aug 2024 11:02 Last modified: 14 Dec 2024 01:38 URI: https://strathprints.strath.ac.uk/id/eprint/90165