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Type: Artigo de periódico
Title: 2D-3D structures: The hydrothermal transformation of a layered sodium silicate, Na-RUB-18, into mordenite zeolite
Author: Ramos, FSO
Munsignatti, ECO
Pastore, HO
Abstract: The synthesis of the high-silica mordenite zeolite by hydrothermal transformation of the Na-RUB-18 layered silicate was conducted by the addition of Al[OCH(CH3)(2)](3) or Na2Al2O4 into the gel after 7 days of hydrothermal treatment of a non-aluminum gel. Extensive characterization showed that the samples were obtained in good crystallinity in periods varying from 7 to 14 days after the addition of the aluminum source when Al[OCH(CH3)(2)](3) was used and after 14 days for Na2Al2O4. Results of Si-29 and Al-27 NMR suggest a gradual transformation of Na-RUB-18 into MOR by the appearance of signals which correspond to silicon atoms coordinated to land 2 Al and one signal corresponding to tetrahedrally coordinated aluminum atoms, both nonexistent in Na-RUB-18. (C) 2013 Elsevier Inc. All rights reserved.
Subject: Na-RUB-18
Hydrothermal transformation
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/j.micromeso.2013.04.017
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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