English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/177795
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Title

Framework Reduction of GeO2 Zeolites During Calcination

AuthorsVillaescusa, Luis A.; Camblor, Miguel Ángel
Keywordszeolite
thermal stability
Issue Date2016
CitationChemistry of Materials
AbstractCalcination in air of GeO 2 zeolites with AST-topology causes reduction of the framework, hence structural destruction, in a notable extension. This is due to the impossibility for the organic cation occluded inside to react with ambient oxygen. As the temperature increases, reoxidation in air of the reduced framework causes episodes of weight-gain. When calcination is carried out in N 2 , weight losses close to 70% imply a loss of Ge due to sublimation of germanium monoxide, GeO. The nature of the organic cation occluded determines the nature and oxidation state of the final residue after calcination in N 2 : for tetramethylammonium the residue is GeO 2 while trimethyl-terc-butylammonium, thanks to its larger C content, yields metallic Ge. Framework organoreduction is not unique to GeO 2 -AST zeolites but also occurs during the calcination in air of other germanium-containing zeolites with larger pore openings.
Publisher version (URL)http://pubs.acs.org/doi/abs/10.1021/acs.chemmater.6b03682
URIhttp://hdl.handle.net/10261/177795
DOI10.1021/acs.chemmater.6b03682
Appears in Collections:(ICMM) Artículos
Files in This Item:
File Description SizeFormat 
ChemMat Framework Reduction of GeO2 Zeolites During Calcination acschemmater6b03682.pdfMain Article1,32 MBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.