Synergistic Effect of Mixed Oxide on the Adsorption of Ammonia with Metal–Organic Frameworks
| Autor: | Krista S. Walton, William P. Mounfield, Pradeep K. Agrawal, Micaela Taborga Claure, Christopher W. Jones |
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| Rok vydání: | 2016 |
| Předmět: |
Chemistry
General Chemical Engineering Inorganic chemistry Composite number Oxide 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Industrial and Manufacturing Engineering 0104 chemical sciences Ammonia chemistry.chemical_compound Adsorption Ammonia adsorption Mixed oxide Metal-organic framework 0210 nano-technology Powder diffraction |
| Zdroj: | Industrial & Engineering Chemistry Research. 55:6492-6500 |
| ISSN: | 1520-5045 0888-5885 |
| DOI: | 10.1021/acs.iecr.6b01045 |
| Popis: | A hydrotalcite-derived MgAl oxide (MMO) was evaluated in combination with the metal–organic frameworks (MOFs) UiO-66 and UiO-66-NH2 for the adsorption of ammonia. Analysis of the materials’ textural properties after ammonia breakthrough adsorption revealed no change in the PXRD patterns or FTIR spectra; however, a slight decrease in surface area was observed, consistent with the hypothesized presence of strongly adsorbed species after adsorption. UiO-66:MMO and UiO-66-NH2:MMO composites maintained ammonia adsorption capacity under dry conditions. An almost 2-fold increase in humid ammonia capacity was observed for the UiO-66:MMO composite, far beyond that expected through a linear combination of the two materials’ capacities. The synergistic effect observed in humid conditions was further investigated with water adsorption experiments, which suggested the effect is the result of the high water affinity of MMO. |
| Databáze: | OpenAIRE |
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