FT-infrared band analysis and temperature programmed dessorption for the Y, L and ferrierite zeolites
| Autor: | Claudio A. Téllez S, Fabiano Lins da Silva, M. Isabel Pais da Silva |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Pyridines
Infrared Inorganic chemistry Infrared spectroscopy Atomic and Molecular Physics and Optics Analytical Chemistry chemistry.chemical_compound Adsorption Ferrierite chemistry Spectroscopy Fourier Transform Infrared Pyridine Zeolites Lewis acids and bases Zeolite Brønsted–Lowry acid–base theory Instrumentation Spectroscopy |
| Zdroj: | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 58:3159-3166 |
| ISSN: | 1386-1425 |
| DOI: | 10.1016/s1386-1425(02)00121-x |
| Popis: | With the aim to qualifying and quantifying the acidity of the Y, L and ferrierite zeolites, an infrared band analysis of pyridine adsorption and programmed temperature dessorption measurements were carried out to a set of nine samples of the Y, L and ferrierite zeolites. The infrared spectra before and after the pyridine adsorption process had revealed that the ferrierite zeolite shows, almost in the totality, Brönsted acid sites. The Y and L zeolites present, also, significative concentrations of Brönsted and Lewis acid sites. These facts allow to conclude that zeolite ferrierite is the strongest acid zeolite among these three types. |
| Databáze: | OpenAIRE |
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