464264 Adsorption Separation of N2 from CH4 Containing Mixtures Using N2 Selective Cation Exchanged Clinoptilolite

Wednesday, November 16, 2016: 9:50 AM
Cyril Magnin I (Parc 55 San Francisco)
Dean Kennedy and F. Handan Tezel, Department of Chemical and Biological Engineering, University of Ottawa, Ottawa, ON, Canada

The application of N2 selective adsorbent materials within unconventional natural gas and biogas upgrading processes has the potential to achieve a more economically efficient separation of N2 from hydrocarbon mixtures containing CH4 than current separation processes. Conventionally, almost all adsorbents are selective for CH4 over N2. However, inverse selectivity is desired for this separation. In this study, the potential of cation exchanged clinoptilolite adsorbents were studied for the selective separation of N2 from CH4 containing gas mixtures. Single component adsorption equilibrium isotherms and uptake measurements of CH4 and N2 confirm the promising N2 selective properties of the cation exchanged clinoptilolite. Adsorption breakthrough curve experiments and the effects of competitive adsorption of binary CH4-N2 mixtures on the studied adsorbents are explored and will be discussed along with the applicability of ion exchanged clinoptilolite in various adsorption technologies for this separation.

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