Volumetric adsorption measurements of N 2, CO 2, CH 4, and a CO 2 + CH 4 mixture on a natural chabazite from (5 to 3000) kPa

Watson, Guillaume C., Jensen, Nathan K., Rufford, Thomas E., Chan, K. Ida and May, Eric F. (2012) Volumetric adsorption measurements of N 2, CO 2, CH 4, and a CO 2 + CH 4 mixture on a natural chabazite from (5 to 3000) kPa. Journal of Chemical and Engineering Data, 57 1: 93-101. doi:10.1021/je200812y


Author Watson, Guillaume C.
Jensen, Nathan K.
Rufford, Thomas E.
Chan, K. Ida
May, Eric F.
Title Volumetric adsorption measurements of N 2, CO 2, CH 4, and a CO 2 + CH 4 mixture on a natural chabazite from (5 to 3000) kPa
Formatted title
Volumetric adsorption measurements of N 2, CO 2, CH 4, and a CO 2 + CH 4 mixture on a natural chabazite from (5 to 3000) kPa
Journal name Journal of Chemical and Engineering Data   Check publisher's open access policy
ISSN 0021-9568
1520-5134
Publication date 2012-01
Sub-type Article (original research)
DOI 10.1021/je200812y
Volume 57
Issue 1
Start page 93
End page 101
Total pages 9
Place of publication Washington, DC, United States
Publisher American Chemical Society
Collection year 2012
Language eng
Formatted abstract
We report here measured adsorption capacities for a natural chabazite zeolite at pressures ranging from (5 to 3000) kPa, at temperatures of (244 and 305) K, for pure N 2, CH 4, and CO 2, and for gas mixtures of CH 4 + CO 2. The pure gas data sets from this work and from the literature were in good agreement (10 %) and were regressed to Toth models over a wide range of pressure and temperature. We show that extrapolation of models that were fit only to low pressure data (below 120 kPa) can lead to a 30 % deviation in adsorption capacities predicted at high pressures. Similarly, models fit only to high pressure pure fluid data resulted in unreliable predictions for mixture adsorption capacities particularly when the component's partial pressure was low. The experimental results indicate that, while the chabazite is unlikely to be useful for N 2/CH 4 separation, it may have potential for removing bulk CO 2 from natural gas, particularly at low temperatures. A feed gas mixture of 0.95CH 4 + 0.05CO 2 placed in contact with the chabazite resulted in equilibrium vapor phases with CO 2 mole fractions of about (0.0013 and 0.0002) at (305 and 244) K, respectively. The ideal adsorbed solution theory was used to successfully describe the observed mixture behavior, although it was found to be sensitive to the data range over which the pure fluid models were regressed
Keyword Exchanged Chabazite Zeolites
Pressure Swing Adsorption
Carbon molecular sieves
Activated Carbon
Nitrogen Methane
Natural Zeolites
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Non HERDC
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 11 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 15 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Thu, 17 Jan 2013, 13:10:12 EST by Dr Thomas Rufford on behalf of School of Chemical Engineering