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Gas in scattering media absorption spectroscopy for time-resolved characterization of gas diffusion processes in porous materials
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SYSNO ASEP 0584856 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Gas in scattering media absorption spectroscopy for time-resolved characterization of gas diffusion processes in porous materials Author(s) Dostál, Michal (UFCH-W) RID, ORCID, SAI
Suchánek, Jan (UFCH-W) RID, ORCID
Bitala, P. (CZ)
Klečka, V. (CZ)
Nevrlý, Václav (UFCH-W)
Klímková, L. (CZ)
Konečný, P. (CZ)
Vořechovská, D. (CZ)
Kubát, Pavel (UFCH-W) RID, ORCID, SAI
Zelinger, Zdeněk (UFCH-W) RID, ORCIDArticle number 114494 Source Title Measurement. - : Elsevier - ISSN 0263-2241
Roč. 230, MAY 2024 (2024)Number of pages 9 s. Language eng - English Country NL - Netherlands Keywords Absorption spectroscopy ; Diode laser ; Gas diffusion ; Light scattering ; Porous material Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry R&D Projects GA22-19812S GA ČR - Czech Science Foundation (CSF) SS03010139 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) Method of publishing Limited access Institutional support UFCH-W - RVO:61388955 UT WOS 001218981600001 EID SCOPUS 85188176672 DOI 10.1016/j.measurement.2024.114494 Annotation Signal denoising is a serious problem for in-situ laser diagnostics of gases dispersed in porous materials. An optical sensor system based on absorption spectroscopy of gases in a scattering environment was built using a 3D printed cell with reference samples of polystyrene foam. Selected A-band spectral lines of molecular oxygen were investigated using wavelength modulated spectroscopy with second harmonic detection. Quantitative information on the concentration of analyte dispersed in the porous medium was obtained at extremely low signal-to-noise ratio (SNR < 10). A spectral line shape fitting procedure based on the Gabor transform followed by a filtered inverse fast Fourier transform allowed to achieve a relatively high SNR with good linearity over a range of reduced oxygen concentrations in air. Finally, the applicability of the optical sensor system to monitor the diffusion of carbon dioxide into air dispersed in a Styrofoam sample and vice versa was successfully demonstrated. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2025 Electronic address https://www.sciencedirect.com/science/article/pii/S0263224124003798?via%3Dihub
Number of the records: 1