| Autor: |
Mishra P; Department of Chemical Engineering, Indian Institute of Technology Guwahati , Guwahati -781039, Assam, India., Edubilli S, Uppara HP, Mandal B, Gumma S |
| Jazyk: |
angličtina |
| Zdroj: |
Langmuir : the ACS journal of surfaces and colloids [Langmuir] 2013 Oct 01; Vol. 29 (39), pp. 12162-7. Date of Electronic Publication: 2013 Sep 19. |
| DOI: |
10.1021/la4027128 |
| Abstrakt: |
Structural transformation of MIL-53(Al) metal organic framework from large pore to narrow pore form (lp → np) or vice versa is known to occur by adsorption of certain guest molecules, by temperature change or by applying mechanical pressure. In this work, we perform a systematic investigation to demonstrate that adsorbent history also plays a decisive role in the structural transitions of this material (and hence on its adsorption characteristics). By changing the adsorbent history, parent MIL-53(Al) is tuned into its np domain at ambient temperature such that it not only exhibits a significant increase in CO2 capacity, but also shows negligible uptake for CH4, N2, CO, and O2 at subatmospheric pressure. In addition, for the high pressure region (1-8 bar), we propose a method to retain the lp form of the sample to enhance its CO2 uptake. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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