A laser analyzer of the kinetics of interaction of water molecules with an adsorbent

A device for recording high-speed processes of water-vapor sorption at the surfaces of porous materials is described. The water-vapor pressure over a sample is measured during the sorption process by registering the integral intensity of the absorption line of H 2 O molecules at a wavelength of 1.85...

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Bibliographic Details
Published in:Instruments and experimental techniques (New York) 2013-09, Vol.56 (5), p.602-606
Main Authors: Artemov, V. G., Kapralov, P. O., Kurmasheva, D. M., Tikhonov, V. I., Volkov, A. A.
Format: Article
Language:English
Subjects:
Electrical Engineering
Laboratory Techniques
Measurement Science and Instrumentation
Physical Chemistry
Physics
Physics and Astronomy
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Summary:A device for recording high-speed processes of water-vapor sorption at the surfaces of porous materials is described. The water-vapor pressure over a sample is measured during the sorption process by registering the integral intensity of the absorption line of H 2 O molecules at a wavelength of 1.85 μm. The kinetic curves of changes in the partial pressure (concentration of H 2 O molecules) from 1 mTorr to 20 Torr are recorded in a time range from 1 ms to 24 h with an accuracy better than 1% at buffer-gas concentrations of 0–760 Torr. The obtained data are used to determine the sorption and structural parameters of investigated materials.
ISSN:0020-4412
1608-3180
DOI:10.1134/S0020441213040143