Dynamics of water diffusion in mesoporous zeolites

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Pulsed field gradient NMR has been applied to investigate water diffusion in Na+-form zeolites beta and LTA if, in addition to the micropores, the intracrystalline space is traversed by a network of mesopores. In zeolite beta, the presence of the mesopores is found to enhance the rate of molecular diffusion by a factor of 3. The measurements with mesoporous zeolite LTA yield diffusivities which reproduce the order of magnitude of the diffusivities found in previous studies with genuine microporous specimens. (C) 2010 Elsevier Inc. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2011-06
Language
English
Article Type
Article
Keywords

CONTROLLED DESILICATION; MICROPOROUS FRAMEWORKS; HIERARCHICAL ZEOLITES; CATALYTIC-PROPERTIES; MOLECULAR-TRANSPORT; DIRECTED SYNTHESIS; TRACER DESORPTION; ZSM-5 ZEOLITE; POROUS-MEDIA; NMR

Citation

MICROPOROUS AND MESOPOROUS MATERIALS, v.142, no.1, pp.236 - 244

ISSN
1387-1811
DOI
10.1016/j.micromeso.2010.12.005
URI
http://hdl.handle.net/10203/24697
Appears in Collection
CBE-Journal Papers(저널논문)CH-Journal Papers(저널논문)
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