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NMR studies of carbon dioxide and methane self-diffusion in ZIF-8 at elevated gas pressures

IR@CSIR-NEERI

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Title NMR studies of carbon dioxide and methane self-diffusion
in ZIF-8 at elevated gas pressures
 
Creator Pusch, Anne-Kristin
Splith, Tobias
Moschkowitz, Lutz
Karmakar, Shilpi
Biniwale, Rajesh B
Sant, Marco
Suffritti, Giuseppe B
Demontis, Pierfranco
Cravillon, Janosch
Pantatosaki, Evangelia
Stallmach, Frank
 
Subject Materials Science
 
Description Self-diffusion measurements with methane and
carbon dioxide adsorbed in the Zeolitic Imidazolate Framework-
8 (ZIF-8) were performed by 1H and 13C pulsed field
gradient nuclear magnetic resonance (PFG NMR). The experiments
were conducted at 298 K and variable pressures
of 7 to 15 bar in the gas phase above the ZIF-8 bed. Via
known adsorption isotherms these pressures were converted
to loadings of the adsorbed molecules. The self-diffusion
coefficients of carbon dioxide measured by PFG NMR are
found to be independent of loading. They are in good agreement
with results from molecular dynamic (MD) simulations
and resume the trend previously found by IR microscopy
at lower loadings. Methane diffuses in ZIF-8 only
slightly slower than carbon dioxide. Its experimentally obtained
self-diffusion coefficients are about a factor of two
smaller than the corresponding values determined by MD
simulations using flexible frameworks
 
Publisher Springer
 
Date 2012
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://neeri.csircentral.net/1050/1/Adsorption%202012.pdf
Pusch, Anne-Kristin and Splith, Tobias and Moschkowitz, Lutz and Karmakar, Shilpi and Biniwale, Rajesh B and Sant, Marco and Suffritti, Giuseppe B and Demontis, Pierfranco and Cravillon, Janosch and Pantatosaki, Evangelia and Stallmach, Frank (2012) NMR studies of carbon dioxide and methane self-diffusion in ZIF-8 at elevated gas pressures. Adsorption, 18 (5-6). pp. 359-366. ISSN 0929-5607 (Print) 1572-8757 (Online)
 
Relation https://link.springer.com/journal/10450
http://neeri.csircentral.net/1050/