title: FT-infrared band analysis and temperature programmed dessorption for the Y, L and ferrierite zeolites.
abstract: 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.
authors.affiliation: 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.
authors.forename: M Isabel
authors.initials: MI
authors.lastname: Pais da Silva
authors.forename: Fabiano
authors.initials: F
authors.lastname: Lins da Silva
authors.forename: Claudio A
authors.initials: CA
authors.lastname: Téllez
mesh_terms: D011725:Pyridines / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D017641:Zeolites / Q000737:chemistry*
chemical_list: D011725:Pyridines; D017641:Zeolites; C023666:pyridine