Title: Separation of CO2/CH4 mixtures with the MIL-53(Al) metal–organic framework
Authors: Finsy, Vincent
Ma, L
Alaerts, Luc
De Vos, Dirk
Baron, Gino
Denayer, Joeri # ×
Issue Date: Apr-2009
Publisher: Elsevier
Series Title: Microporous and Mesoporous Materials vol:120 issue:3 pages:221-227
Abstract: Adsorptive separation of CH4/CO2 mixtures was studied using a fixed-bed packed with MIL-53(Al) MOF pellets. Such pellets of MIL-53(Al) were produced using a polyvinyl alcohol binder. As revealed by N2 adsorption isotherms, the use of polyvinyl alcohol as binder results in a loss in overall capacity of 32%. Separations of binary mixtures in breakthrough experiments were successfully performed at pressures varying between 1 and 8 bar and different mixture compositions. The binary adsorption isotherms reveal
a preferential adsorption of CO2 compared to CH4 over the whole pressure and concentration range. The separation selectivity was affected by total pressure; below 5 bar, a constant selectivity, with an average separation factor of about 7 was observed. Above 5 bar, the average separation factor decreases to about 4. The adsorption selectivity is affected by breathing of the framework and specific interaction of CO2 with framework hydroxyl groups. CO2 desorption can be realised by mild thermal treatment.
ISSN: 1387-1811
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Centre for Surface Chemistry and Catalysis
× corresponding author
# (joint) last author

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