Results of the first pulsed field gradient (PFG) NMR studies of hydrogen diffusion in zeolites are presented and compared with corresponding measurements by quasielastic neutron scattering (QENS). The results of the two techniques were in satisfactory agreement. Similarly as with other probe molecul
Combining macroscopic and microscopic diffusion studies in zeolites using NMR techniques
✍ Scribed by Krzysztof Banas; Federico Brandani; Douglas M. Ruthven; Frank Stallmach; Jörg Kärger
- Publisher
- Elsevier Science
- Year
- 2005
- Tongue
- English
- Weight
- 183 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0730-725X
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Recent methodological progress in pulsed field gradient (PFG) NMR and quasi-elastic neutron scattering (QENS) is exploited to enhance the range of diffusion measurement of the series of the n-alkane homologues in MFI-type zeolites (silicalite-1, ZSM-5) up to n-tetradecane. As observed already for th
N-type COSY spectrum, obtained on a Varian Unity 500 The sensitivity of many 2D experiments is limited not by spectrometer, of the tetracyclic orthoamide: the ratio of signal to thermal noise, but by the ratio of signal to t 1 noise. This noise, in bands running parallel to f 1 at the f 2 frequency