Speaker
Dr
Qinfen Gu
(Australian Synchrotron)
Description
Zeolite molecular sieves are one of the most important materials for separation of molecules. We discovered smart porous materials for gas separation – zeolites containing cations that function as molecular trapdoors allow guest-selective, size-inverse separations. For example, a “molecular trapdoor” mechanism in specifically tailored zeolites which produces a counter-intuitive size-inverse “sieving” for CO/N2, and a record high selectivity for CO2/CH4 separation over a large pressure range. [1] In the other case, we found an unusual operating regime on a chabazite zeolite in which the adsorption selectivity for N2 over CH4 inverts from being more selective for N2 at 253 K, to becoming less selective with increasing temperature and eventually becoming selective for CH4 over N2 above 293 K. [2] These materials could benefit for carbon capture and gas purification.
[1] Shang, Jin; Li, Gang; Singh, Ranjeet; Gu, Qinfen; et al. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,134, 46,19246-19253, (2012)
[2] Shang, Jin; Li, Gang; Gu, Qinfen; et al. CHEMICAL COMMUNICATIONS, 50, 35, 4544-4546, (2014)
| Keywords or phrases (comma separated) | powder diffraction, zeolite, gas separation, structure |
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Primary author
Dr
Qinfen Gu
(Australian Synchrotron)
