Abstract
The neutron spin-echo (NSE) and pulsed-field gradient (PFG) NMR techniques are applied to investigate the microdynamics of n-hexane diffusion in a commercial sample of zeolite NaCaA. In the PFG NMR measurements molecular root mean square displacements in the range from 100 nm to 2 μm are covered, while the NSE experiments applied to deuterated guest molecules provide information about the rate of molecular fluxes over distances of a few nm. Taking into account these differences, the obtained diffusivity data are found to be in reasonable agreement.
| Original language | English |
|---|---|
| Pages (from-to) | 113-121 |
| Number of pages | 9 |
| Journal | Microporous and Mesoporous Materials |
| Volume | 59 |
| Issue number | 2-3 |
| DOIs | |
| State | Published - May 19 2003 |
| Externally published | Yes |
Funding
J. Kärger and C. Krause are obliged to the Deutsche Forschungsgemeinschaft (SFB 294) and the Fonds der Chemischen Industrie for financial assistance. The neutron experiments were performed at the Institut Laue-Langevin, Grenoble, France. This work was partially supported by a CNRS-DFG bilateral project.
| Funders | Funder number |
|---|---|
| CNRS-DFG | |
| Verband der Chemischen Industrie | |
| Deutsche Forschungsgemeinschaft | SFB 294 |
Keywords
- 5A zeolite
- Diffusion
- Neutron spin-echo
- Pulsed-field gradient NMR
- n-hexane