Detail publikačního výsledku

Gas in scattering media absorption spectroscopy for time-resolved characterization of gas diffusion processes in porous materials

DOSTÁL, M.; SUCHÁNEK, J.; BITALA, P.; KLEČKA, V.; NEVRLÝ, V.; KLIMKOVÁ, L.; KONEČNÝ, P.; VOŘECHOVSKÁ, D.; KUBÁT, P.; ZELINGER, Z.

Originální název

Gas in scattering media absorption spectroscopy for time-resolved characterization of gas diffusion processes in porous materials

Anglický název

Gas in scattering media absorption spectroscopy for time-resolved characterization of gas diffusion processes in porous materials

Druh

Článek WoS

Originální abstrakt

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.

Anglický abstrakt

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.

Klíčová slova

Light scattering; Diode laser; Absorption spectroscopy; Gas diffusion; Porous material

Klíčová slova v angličtině

Light scattering; Diode laser; Absorption spectroscopy; Gas diffusion; Porous material

Autoři

DOSTÁL, M.; SUCHÁNEK, J.; BITALA, P.; KLEČKA, V.; NEVRLÝ, V.; KLIMKOVÁ, L.; KONEČNÝ, P.; VOŘECHOVSKÁ, D.; KUBÁT, P.; ZELINGER, Z.

Rok RIV

2025

Vydáno

15.05.2024

Nakladatel

Elsevier B.V.

ISSN

0263-2241

Periodikum

MEASUREMENT

Svazek

230

Číslo

114494

Stát

Spojené království Velké Británie a Severního Irska

Strany od

1

Strany do

9

Strany počet

9

URL

https://www.sciencedirect.com/science/article/pii/S0263224124003798

BibTex

@article{BUT194142,
  author="Michal {Dostál} and Jan {Suchánek} and Petr {Bitala} and Vít {Klečka} and Václav {Nevrlý} and Lenka {Klimková} and Petr {Konečný} and Dita {Vořechovská} and Pavel {Kubát} and Zdeněk {Zelinger}",
  title="Gas in scattering media absorption spectroscopy for time-resolved characterization of gas diffusion processes in porous materials",
  journal="MEASUREMENT",
  year="2024",
  volume="230",
  number="114494",
  pages="1--9",
  doi="10.1016/j.measurement.2024.114494",
  issn="0263-2241",
  url="https://www.sciencedirect.com/science/article/pii/S0263224124003798"
}