Dealumination of ZSM-5 — Characterization by TPD, DTA/DTG, XPS and Adsorption Measurements
| Autor: | E. Alsdorf, M. Feist, H. Fichtner-Schmittler, Th. Gross, H.-J. Jerschkewitz, U. Lohse, B. Parlitz |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 1988 |
| Předmět: | |
| Zdroj: | Adsorption Science & Technology, Vol 5 (1988) |
| Druh dokumentu: | article |
| ISSN: | 0263-6174 2048-4038 02636174 |
| DOI: | 10.1177/026361748800500204 |
| Popis: | A series of ZSM 5 samples obtained by dealumination is studied by TPD, DTA/DTG, XPS and adsorption measurements. The amount of adsorbed water at p/p 0 ≦ 0.1 and the amount of chemisorbed NH 3 corresponding to the TPD peak at 693–723 K correlate with the number of framework aluminium atoms per unit cell. At strong dealumination an enrichment of non-framework aluminium in the surface layers of the crystals was found. The HZSM-57 zeolites are transformed into silicalite-like samples during the course of the DTA experiment in the temperature range 973–1273 K. |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
|