Adsorption equilibria and kinetics of methane + nitrogen mixtures on the activated carbon Norit RB3

Rufford, Thomas E., Watson, Guillaume C. Y., Saleman, Thomas L, Hofman, Paul S., Jensen, Nathan K. J and May, Eric F. M (2013). Adsorption equilibria and kinetics of methane + nitrogen mixtures on the activated carbon Norit RB3. In: Recent Advances in Nanotechnology-based Water Purification Methods. 2nd Workshop of the Nano4water Cluster, Chalkidiki, Greece, (14270-14281). 24-25 April 2012. doi:10.1021/ie401831u

Author Rufford, Thomas E.
Watson, Guillaume C. Y.
Saleman, Thomas L
Hofman, Paul S.
Jensen, Nathan K. J
May, Eric F. M
Title of paper Adsorption equilibria and kinetics of methane + nitrogen mixtures on the activated carbon Norit RB3
Conference name 2nd Workshop of the Nano4water Cluster
Conference location Chalkidiki, Greece
Conference dates 24-25 April 2012
Proceedings title Recent Advances in Nanotechnology-based Water Purification Methods   Check publisher's open access policy
Journal name Industrial and Engineering Chemistry Research   Check publisher's open access policy
Place of Publication Washington, United States
Publisher American Chemical Society
Publication Year 2013
Year available 2013
Sub-type Fully published paper
DOI 10.1021/ie401831u
Open Access Status Not yet assessed
ISSN 0888-5885
Volume 52
Issue 39
Start page 14270
End page 14281
Total pages 12
Language eng
Abstract/Summary The separation of methane and nitrogen from binary mixtures using a commercial activated carbon, Norit RB3, was investigated. The adsorption of pure fluids and CH4 + N2 mixtures were measured at temperatures of 242, 273, and 303 K, at pressures ranging from 53 to 5000 kPa using a high pressure volumetric apparatus and at pressures from 104 to 902 kPa using a dynamic column breakthrough apparatus (DCB). The pure gas equilibrium adsorption capacities were regressed to Toth, Langmuir, Langmuir-Freundlich, and Sips isotherm models; the Toth model gave the best prediction of measured capacities at pressures from 800 to 5000 kPa. The uptake of components from gas mixtures calculated using the Ideal Adsorbed Solution Theory (IAST), Extended Langmuir and Multi-Sips models were all within the uncertainties of the measured adsorption capacities, suggesting that for this adsorbent there is no significant advantage in using the more computationally intensive IAST method. A linear driving force (LDF)-based model of adsorption in a fixed bed was developed to extract the lumped mass transfer coefficients for CH4 and N2 from the pure gas DCB experimental data. This model was used with results from the pure gas experiments to predict the component breakthroughs from equimolar CH4 + N2 mixtures in the DCB apparatus. The Norit RB3 exhibited equilibrium selectivities for CH4 over N2 in the range 3 to 7 (measured selectivites have an average uncertainty of 37%), while the lumped mass transfer coefficients of CH 4 and N2 were similar for this activated carbon, ranging from 0.004 to 0.052 s-1. The results presented can serve as a reference data set upon which industrial PSA processes for separating CH 4 + N2 mixtures using generic activated carbons can be developed and optimized over a wide range of pressures and temperatures.
Subjects 1500 Chemical Engineering
1600 Chemistry
2209 Industrial and Manufacturing Engineering
Keyword Dynamic Column Breakthrough
Fixed-Bed Adsorption
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Special issue of Industrial & Engineering Chemistry Research (I&EC) embodies selected papers on “Recent Advances in Nanotechnology-based Water Purification Methods” presented at the second Workshop of the Nano4-water Cluster, held in Chalkidiki, Greece on April 24−25, 2012.

Document type: Conference Paper
Sub-type: Fully published paper
Collections: School of Chemical Engineering Publications
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Created: Wed, 20 Nov 2013, 00:22:04 EST by Dr Thomas Rufford on behalf of Scholarly Communication and Digitisation Service