Oscillometric–gravimetric measurements of pure gas adsorption equilibria without the non-adsorption of helium hypothesis

Oscillometric–gravimetric measurements of pure gas adsorption equilibria without the... The adsorption of gaseous carbon dioxide (CO2) at near ambient conditions (297 K, 995 mbar) on activated carbon BAX 1100 (Ingevity), has been measured by a new oscillometric-gravimetric method. The method consists of combined gravimetric and dynamic measurements, namely observations of the frequency of small and nearly adiabatic oscillations of the sorptive gas being in equilibrium with the adsorbed phase of adsorbate. The oscillations observed are actually eigenoscillations of a sorptive gas–sorbate–sorbent system. They are initiated by small oscillations of a sphere or a cylinder positioned in a vertical tube above the vessel containing the gas and the sorbent material reversion of experiment by Rüchardt (Phys. Zeitschr XXX:58, 1929)–Flammersfeld (Z. Naturforsch. 23a:3, 1972). Experiments show that the adsorbate includes two different phases consisting respectively of molecules which are only weakly bound to sorbent’s atoms so that they can participate in the low frequency gas oscillations (<10 Hz), and other molecules being strongly bound to sorbent’s atoms so they are “stiff”, i.e. cannot participate in the gas oscillations, eigenfrequencies being in the range of (1010–1012) Hz. The theory of these measurements is outlined and data of adsorption equilibria of carbon dioxide gas on activated carbon BAX 1100 at near ambient conditions which have been measured by three different methods are presented and compared to each other. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Adsorption Springer Journals

Oscillometric–gravimetric measurements of pure gas adsorption equilibria without the non-adsorption of helium hypothesis

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Publisher
Springer US
Copyright
Copyright © 2017 by Springer Science+Business Media, LLC
Subject
Chemistry; Industrial Chemistry/Chemical Engineering; Surfaces and Interfaces, Thin Films; Engineering Thermodynamics, Heat and Mass Transfer
ISSN
0929-5607
eISSN
1572-8757
D.O.I.
10.1007/s10450-017-9893-2
Publisher site
See Article on Publisher Site

Abstract

The adsorption of gaseous carbon dioxide (CO2) at near ambient conditions (297 K, 995 mbar) on activated carbon BAX 1100 (Ingevity), has been measured by a new oscillometric-gravimetric method. The method consists of combined gravimetric and dynamic measurements, namely observations of the frequency of small and nearly adiabatic oscillations of the sorptive gas being in equilibrium with the adsorbed phase of adsorbate. The oscillations observed are actually eigenoscillations of a sorptive gas–sorbate–sorbent system. They are initiated by small oscillations of a sphere or a cylinder positioned in a vertical tube above the vessel containing the gas and the sorbent material reversion of experiment by Rüchardt (Phys. Zeitschr XXX:58, 1929)–Flammersfeld (Z. Naturforsch. 23a:3, 1972). Experiments show that the adsorbate includes two different phases consisting respectively of molecules which are only weakly bound to sorbent’s atoms so that they can participate in the low frequency gas oscillations (<10 Hz), and other molecules being strongly bound to sorbent’s atoms so they are “stiff”, i.e. cannot participate in the gas oscillations, eigenfrequencies being in the range of (1010–1012) Hz. The theory of these measurements is outlined and data of adsorption equilibria of carbon dioxide gas on activated carbon BAX 1100 at near ambient conditions which have been measured by three different methods are presented and compared to each other.

Journal

AdsorptionSpringer Journals

Published: Jun 10, 2017

References

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