Title |
Fluorocarbon adsorption in hierarchical porous frameworks
|
---|---|
Published in |
Nature Communications, July 2014
|
DOI | 10.1038/ncomms5368 |
Pubmed ID | |
Authors |
Radha Kishan Motkuri, Harsha V. R. Annapureddy, M. Vijaykumar, H. Todd Schaef, Paul F. Martin, B. Peter McGrail, Liem X. Dang, Rajamani Krishna, Praveen K. Thallapally |
Abstract |
Metal-organic frameworks comprise an important class of solid-state materials and have potential for many emerging applications such as energy storage, separation, catalysis and bio-medical. Here we report the adsorption behaviour of a series of fluorocarbon derivatives on a set of microporous and hierarchical mesoporous frameworks. The microporous frameworks show a saturation uptake capacity for dichlorodifluoromethane of >4 mmol g(-1) at a very low relative saturation pressure (P/Po) of 0.02. In contrast, the mesoporous framework shows an exceptionally high uptake capacity reaching >14 mmol g(-1) at P/Po of 0.4. Adsorption affinity in terms of mass loading and isosteric heats of adsorption is found to generally correlate with the polarizability and boiling point of the refrigerant, with dichlorodifluoromethane >chlorodifluoromethane >chlorotrifluoromethane >tetrafluoromethane >methane. These results suggest the possibility of exploiting these sorbents for separation of azeotropic mixtures of fluorocarbons and use in eco-friendly fluorocarbon-based adsorption cooling. |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Belgium | 1 | 1% |
Unknown | 81 | 99% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Researcher | 19 | 23% |
Student > Ph. D. Student | 14 | 17% |
Student > Master | 10 | 12% |
Student > Bachelor | 5 | 6% |
Student > Doctoral Student | 4 | 5% |
Other | 12 | 15% |
Unknown | 18 | 22% |
Readers by discipline | Count | As % |
---|---|---|
Chemistry | 21 | 26% |
Chemical Engineering | 16 | 20% |
Engineering | 10 | 12% |
Materials Science | 4 | 5% |
Environmental Science | 2 | 2% |
Other | 7 | 9% |
Unknown | 22 | 27% |