TY  - JOUR
A1  - Debatin, Franziska
A1  - Möllmer, Jens
A1  - Mondal, Suvendu Sekhar
A1  - Behrens, Karsten
A1  - Möller, Andreas
A1  - Staudt, Reiner
A1  - Thomas, Arne
A1  - Holdt, Hans-Jürgen
T1  - Mixed gas adsorption of carbon dioxide and methane on a series of isoreticular microporous metal-organic frameworks based on 2-substituted imidazolate-4-amide-5-imidates
JF  - Journal of materials chemistry
N2  - In this work the adsorption of CO2 and CH4 on a series of isoreticular microporous metal-organic frameworks based on 2-substituted imidazolate-4-amide-5-imidates, IFP-1-IFP-6 (IFP Imidazolate Framework Potsdam), is studied firstly by pure gas adsorption at 273 K. All experimental isotherms can be nicely described by using the Toth isotherm model and show the preferred adsorption of CO2 over CH4. At low pressures the Toth isotherm equation exhibits a Henry region, wherefore Henry's law constants for CO2 and CH4 uptake could be determined and ideal selectivity (alpha CO2/CH4) has been calculated. Secondly, selectivities were calculated from mixture data by using nearly equimolar binary mixtures of both gases by a volumetric-chromatographic method to examine the IFPs. Results showed the reliability of the selectivity calculation. Values of (alpha CO2/CH4) around 7.5 for IFP-5 indicate that this material shows much better selectivities than IFP-1, IFP-2, IFP-3, IFP-4 and IFP-6 with slightly lower selectivity (alpha CO2/CH4) = 4-6. The preferred adsorption of CO2 over CH4 especially of IFP-5 and IFP-4 makes these materials suitable for gas separation application.
Y1  - 2012
U6  - https://doi.org/10.1039/c2jm15811f
SN  - 0959-9428
VL  - 22
IS  - 20
SP  - 10221
EP  - 10227
PB  - Royal Society of Chemistry
CY  - Cambridge
ER  -