| Autor: |
Yoshio Ono, Tominaga Keii, Kazutoshi Kogo, Masamichi Kaneko, Hiroshi Takayanagi |
| Rok vydání: |
1976 |
| Předmět: |
|
| Zdroj: |
Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases. 72:2150 |
| ISSN: |
0300-9599 |
| Popis: |
Various properties of ammonium exchanged type L zeolite have been studied. The deammoniation of NH4–L and the following formation of acidic centres were examined by infrared spectroscopy. Most of the hydroxyl groups and pyridinium ions formed interact with lattice oxygens through hydrogen bonding. The activity of NH4–L (33) for cumene cracking showed that deammoniation is complete around 350°C and that the dehydroxylation occurs between 500–600°C. The formation of sulphur dioxide anion radicals and perylene cation radicals revealed the charge transfer properties of the zeolite. NH4–L zeolite with a high degree of exchange is not thermally stable even at 450°C. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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