A corresponding states principle for physisorption and deviations for quantum fluids

Hye Young Kim, Angela Lueking, Silvina M. Gatica, J. Karl Johnson, Milton Walter Cole

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The principle of corresponding states has long been observed to be valid for simple fluids in the bulk state. It has recently been proposed that fluids adsorbed in a microporous sorbent also follow a form of corresponding states [D.F. Quinn, Carbon 40, 2767 (2002)]. It was observed that adsorption isotherms for several different adsorbates follow near-universal behaviour when plotted at the reduced temperature 2.36 as a function of reduced pressures, where the critical temperature and pressure are used as the reducing parameters. Significantly, Quinn noted that hydrogen manifestly does not follow the trends of the other fluids, showing much higher adsorption than any other fluid studied; this was ascribed to hydrogen being able to adsorb in very narrow pores not accessible to other adsorbates. It is shown in the current work that the anomalous behaviour of hydrogen can be described entirely by quantum effects and the relative strength of the fluid-fluid and solid-fluid potentials. Analytical and simulation methods are used to investigate the adsorption of various gases within slit and cylindrical pores. For large pore sizes, accessible to all adsorbates, corresponding states behaviour occurs for classical gases, with deviations observed for quantum gases, in agreement with experimental observations. In contrast, size-dependent selectivity (sieving) is found in small pores.

Original languageEnglish (US)
Pages (from-to)1579-1585
Number of pages7
JournalMolecular Physics
Volume106
Issue number12-13
DOIs
StatePublished - Jun 1 2008

Fingerprint

Physisorption
Adsorption
Hydrogen
Gases
deviation
Fluids
fluids
Adsorbates
Pressure
Temperature
porosity
Carbon
adsorption
hydrogen
gases
deuterium fluorides
critical pressure
sorbents
Sorbents
Adsorption isotherms

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Molecular Biology
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Cite this

Kim, H. Y., Lueking, A., Gatica, S. M., Johnson, J. K., & Cole, M. W. (2008). A corresponding states principle for physisorption and deviations for quantum fluids. Molecular Physics, 106(12-13), 1579-1585. https://doi.org/10.1080/00268970802189770
Kim, Hye Young ; Lueking, Angela ; Gatica, Silvina M. ; Johnson, J. Karl ; Cole, Milton Walter. / A corresponding states principle for physisorption and deviations for quantum fluids. In: Molecular Physics. 2008 ; Vol. 106, No. 12-13. pp. 1579-1585.
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Kim, HY, Lueking, A, Gatica, SM, Johnson, JK & Cole, MW 2008, 'A corresponding states principle for physisorption and deviations for quantum fluids', Molecular Physics, vol. 106, no. 12-13, pp. 1579-1585. https://doi.org/10.1080/00268970802189770

A corresponding states principle for physisorption and deviations for quantum fluids. / Kim, Hye Young; Lueking, Angela; Gatica, Silvina M.; Johnson, J. Karl; Cole, Milton Walter.

In: Molecular Physics, Vol. 106, No. 12-13, 01.06.2008, p. 1579-1585.

Research output: Contribution to journalArticle

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