All issues Volume 74 (2019) Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles, 74 (2019) 38 Full HTMLAtomic Si/Al ratios of the zeolite after the different steps of the synthesis process.
| Zeolite | Si/Al |
||
|---|---|---|---|
| Chemical analysis | XRDa | XPS | |
| Parent NaY | 2.5 | 2.6 | 2.4 |
| Dealuminated SiCl4 | 18.4 | 29 | 14.5 |
| Washed HCl | 37.7 | 33 | 46.5 |
| Desilicated NaAlO2 | 27.7 | 25 | 6.2 |
Estimated using the Fichtner-Schmittler equation [35].
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