Capacity and kinetic measurements of methane and nitrogen adsorption on H+-mordenite at 243–303 K and pressures to 900 kPa using a dynamic column breakthrough apparatus

Saleman, Thomas L. H., Watson, Guillaume C. Y., Rufford, Thomas E., Hofman, Paul S., Chan, K. Ida and May, Eric F. (2013) Capacity and kinetic measurements of methane and nitrogen adsorption on H+-mordenite at 243–303 K and pressures to 900 kPa using a dynamic column breakthrough apparatus. Adsorption, 19 6: 1165-1180. doi:10.1007/s10450-013-9546-z


Author Saleman, Thomas L. H.
Watson, Guillaume C. Y.
Rufford, Thomas E.
Hofman, Paul S.
Chan, K. Ida
May, Eric F.
Title Capacity and kinetic measurements of methane and nitrogen adsorption on H+-mordenite at 243–303 K and pressures to 900 kPa using a dynamic column breakthrough apparatus
Journal name Adsorption   Check publisher's open access policy
ISSN 0929-5607
1572-8757
Publication date 2013-12
Year available 2013
Sub-type Article (original research)
DOI 10.1007/s10450-013-9546-z
Open Access Status
Volume 19
Issue 6
Start page 1165
End page 1180
Total pages 16
Place of publication New York, NY, United States
Publisher Springer
Collection year 2014
Language eng
Abstract A dynamic column breakthrough (DCB) apparatus was used to measure the capacity and kinetics of CH4 and N2 adsorption on zeolite H+-mordenite at temperatures in the range 243.8-302.9 K and pressures up to 903 kPa. Equilibrium adsorption capacities of pure CH4 and pure N2 were determined by these dynamic experiments and Langmuir isotherm models were regressed to these pure fluid data over the ranges of temperature and pressure measured. A linear driving force-based model of adsorption in a fixed bed was developed to extract the mass transfer coefficients (MTCs) for CH4 and N2 from the pure gas experimental data. The MTCs determined from single adsorbate experiments were used to successfully predict the component breakthroughs for experiments with equimolar CH4 + N2 gas mixtures in the DCB apparatus. The MTC of CH4 on H+-mordenite at 902 kPa was 0.013 s-1 at 302.9 K and 0.004 s-1 at 243.6 K. The MTC of N2 on H+-mordenite at 902 kPa was 0.011 s-1 at 302.9 K and 0.005 s-1 at 243.5 K. The values of the MTCs measured for each gas at a constant feed gas flow rate were observed to increase in a linear trend with the inverse of pressure. However, the apparent MTCs obtained at the lowest pressures studied (≈105 kPa) were systematically below this linear trend, because of the slightly longer residence time of helium in the mass spectrometer used to monitor effluent composition. Nevertheless, the pure fluid dynamic breakthrough data at these lowest pressures could still be reasonably well described using MTC values estimated from the linear trend. Furthermore, the results of dynamic breakthrough experiments with mixtures were all reliably predicted using the capacity and MTC correlations developed for the pure fluids.
Keyword Langmuir isotherm
Linear driving force model
Mass transfer coefficient
Natural gas
Pressure swing adsorption
Zeolite
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Published online: 5 May 2013.

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
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Created: Wed, 08 May 2013, 12:02:52 EST by Dr Thomas Rufford on behalf of School of Chemical Engineering