| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 72341 | Microporous and Mesoporous Materials | 2015 | 5 Pages |
•Heat capacity of five prototypical MOFs from cryogenic to room temperature.•All MOFs exhibit monotonic rise in heat capacity.•MOF-5 specific heat between 2 and 300 K by adiabatic relaxation and Calvet calorimetry.•Group contribution method to empirically calculate the heat capacities of all MOFs.
Specific heat capacities of five MOFs: MOF-5, Cu-BTC, Fe-BTC, MIL-53 (Al) and MOF-177 are reported over wide temperature ranges. For MOF-5, which is the primary candidate material down selected by the Hydrogen Storage Engineering Center of Excellence (HSECoE) for cyro-adsorptive vehicular hydrogen storage, specific heat capacity in the range 2–300 K is obtained by combining the measurements using a Calvet calorimeter and a direct adiabatic relaxation calorimeter while for remaining MOFs, Cps are measured in the temperature range 80–320 K using the Calvet calorimeter alone. All MOFs exhibit monotonically increasing specific heat capacities with no visible thermal anomalies implying the absence of any temperature-induced phase transitions in the temperature range considered. A simple ion-based group contribution approach is applied to empirically predict the specific heat capacities of all MOFs at 323 K.
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