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A Novel Method to Prepare Zeolites with Hierarchical Porosity
Author(s) -
Santacruz I.,
Nieto M. I.,
Moreno R.,
Faraldos M.,
Sastre E.
Publication year - 2005
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.200500091
Subject(s) - marie curie , mica , curie , humanities , materials science , curie temperature , art , physics , composite material , condensed matter physics , ferromagnetism , european union , business , economic policy
A method to prepare zeolites with defined macroporosity that consists in the gelcasting of zeolite suspensions containing a surfactant, responsible for the generation of bubbles on shearing, and a polysaccharide that gels on cooling was proposed. The materials provide a narrow macropore size distribution in addition to the characteristic microporosity of the zeolite. The gelcast zeolite were characterized by SEM, which revealed a highly porous microstructures with cells of different size and communicating porosity. The results show that the longer times of mechanical mixing lead to bigger and deeper pores, since mixing promotes forming of the surfactant-containing slurry.This work has been supported by CICYT, Spain (MAT2003-00836).Peer Reviewe