Dynamic Adsorption of CO2/N2 on Cation-Exchanged Chabazite SSZ-13: A Breakthrough Analysis

Alkali-exchanged SSZ-13 adsorbents were investigated for their applicability in separating N2 from CO2 in flue gas streams using a dynamic breakthrough method. In contrast to IAST calculations based on equilibrium isotherms, K+ exchanged SSZ-13 was found to yield the best N2 productivity, comparable...

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Bibliographic Details
Published in:ACS applied materials & interfaces 2018-05, Vol.10 (17), p.14287-14291
Main Authors: Bower, Jamey K, Barpaga, Dushyant, Prodinger, Sebastian, Krishna, Rajamani, Schaef, H. Todd, McGrail, B. Peter, Derewinski, Miroslaw A, Motkuri, Radha Kishan
Format: Article
Language:English
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Summary:Alkali-exchanged SSZ-13 adsorbents were investigated for their applicability in separating N2 from CO2 in flue gas streams using a dynamic breakthrough method. In contrast to IAST calculations based on equilibrium isotherms, K+ exchanged SSZ-13 was found to yield the best N2 productivity, comparable to Ni-MOF-74, under dynamic conditions where diffusion properties play a significant role. This was attributed to the selective, partial blockage of access to the chabazite cavities, enhancing the separation potential in a 15/85 CO2/N2 binary gas mixture.
ISSN:1944-8244
1944-8252
DOI:10.1021/acsami.8b03848