Gas−Solid Interaction and the Virial Description of the Adsorption of Methane on Steam-Activated Carbon

The virial analysis of the adsorption isotherms of methane on activated microporous chars has been used to investigate the behavior of the gas−solid interface at the temperature T = 298.2 K. A commercial char, CNS-201, is the raw material used in this study. Steam (vaporized water, H2O) has been use...

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Published in:Langmuir 2000-02, Vol.16 (3), p.1163-1166
Main Authors: Okambawa, R, Benaddi, H, St-Arnaud, J.-M, Bose, Tapan K
Format: Article
Language:English
Subjects:
03 NATURAL GAS
08 HYDROGEN
ADSORPTION ISOTHERMS
CHARS
CHEMICAL ACTIVATION
HYDROGEN STORAGE
MATERIALS SCIENCE
METHANE
MORPHOLOGICAL CHANGES
NATURAL GAS
STORAGE
VIRIAL EQUATION
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cited_by cdi_FETCH-LOGICAL-a389t-4f2417f54cceddb675b04607c81fd3ae7e9266d133c328d94b6b4868c28f11be3
cites cdi_FETCH-LOGICAL-a389t-4f2417f54cceddb675b04607c81fd3ae7e9266d133c328d94b6b4868c28f11be3
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description The virial analysis of the adsorption isotherms of methane on activated microporous chars has been used to investigate the behavior of the gas−solid interface at the temperature T = 298.2 K. A commercial char, CNS-201, is the raw material used in this study. Steam (vaporized water, H2O) has been used as the activating agent for the production of the samples tested. The two-dimensional gas−solid second virial coefficients, B gs, deduced from experimental data are analyzed as a function of the duration of the activation process. We observed that the structural changes of the char during the activation process are described by the variation in the value of B gs. The virial treatment is useful to investigate the molecular behavior related to physisorption and to characterize the evolution of microporosity during the activation.
doi_str_mv 10.1021/la9901231
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source American Chemical Society:Jisc Collections:American Chemical Society Read & Publish Agreement 2022-2024 (Reading list)
subjects 03 NATURAL GAS
08 HYDROGEN
ADSORPTION ISOTHERMS
CHARS
CHEMICAL ACTIVATION
HYDROGEN STORAGE
MATERIALS SCIENCE
METHANE
MORPHOLOGICAL CHANGES
NATURAL GAS
STORAGE
VIRIAL EQUATION
title Gas−Solid Interaction and the Virial Description of the Adsorption of Methane on Steam-Activated Carbon
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