Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 66, Issue 1, Pages 21-26Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.micromeso.2003.08.022
Keywords
secondary pore channel; mesoporous zeolite; TEM; N(2) adsorption; DFT model
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The texture of a series of dealuminated macrocrystalline beta zeolites has been investigated by N(2) physisorption, transmission electron microscopy, and electron diffraction. Hydrothermal dealumination creates a secondary mesoporous system in zeolite BEA. N(2) physisorption together with DFT calculations indicated the presence of pores with an estimated size of 2-4 nm after steaming. After subsequent leaching, TEM revealed the newly formed cylindrical mesopores. As determined by electron diffraction, the new porous network consists of pores lying in the (0 0 1) plane. (C) 2003 Elsevier Inc. All rights reserved.
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