FT-infrared band analysis and temperature programmed dessorption for the Y, L and ferrierite zeolites.
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.
Pais da Silva
M Isabel
MI
Pontifícia Universidade Católica do Rio de Janeiro, PUC-Rio, Departamento de Quimica, R. Marqués de S. Vicente 22S, Gávea, Rio de Janeiro, RJ, Cep: 22453-900 Brazil.
Lins da Silva
Fabiano
F
Téllez
Claudio A
CA
D011725:Pyridines / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D017641:Zeolites / Q000737:chemistry*
D011725:Pyridines; D017641:Zeolites; C023666:pyridine