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Equilibrium adsorption measurements of pure Nitrogen, Carbon Dioxide, and Methane on a Carbon molecular sieve at cryogenic temperatures and high pressures†

Watson, G., May, E. F., Graham, B. F., Trebble, M. A., Trengove, R.D. and Chan, K. I. (2009) Equilibrium adsorption measurements of pure Nitrogen, Carbon Dioxide, and Methane on a Carbon molecular sieve at cryogenic temperatures and high pressures†. Journal of Chemical & Engineering Data, 54 (9). p. 2701.

Link to Published Version: http://dx.doi.org/10.1021/je900224w
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Abstract

A detailed experimental study of the adsorption behavior at equilibrium of pure nitrogen, methane, and carbon dioxide gases on a commercial carbon molecular sieve (Shirasagi MSC 3K-161) is reported at temperatures between 115 K to 323 K and pressures up to 5 MPa. A volumetric-type apparatus was used to obtain over 200 excess (Gibbs) adsorption capacity data over this range of pressure and temperature with an estimated uncertainty of 4 %. The absolute adsorption isotherms were type I in the IUPAC classification with the adsorption capacity at constant pressure increasing significantly with decreasing temperature. For each gas, the adsorption data were regressed to a four parameter Toth equation to represent the temperature and pressure dependence of the data with a relative standard uncertainty of 4 %. The optimized parameters from the Toth equation included the isosteric enthalpies of adsorption that were 17 kJ·mol−1, 27 kJ·mol−1, and 18 kJ·mol−1 for N2, CO2, and CH4, respectively.

Publication Type: Journal Article
Publisher: American Chemical Society
Copyright: American Chemical Society
URI: http://researchrepository.murdoch.edu.au/id/eprint/2800
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