University of Wolverhampton
Browse
Collection All
bullet
bullet
bullet
bullet
Listed communities
bullet
bullet
bullet
bullet
bullet
bullet
bullet
bullet
bullet
bullet
bullet
bullet
bullet

Wolverhampton Intellectual Repository and E-Theses > School of Applied Sciences > Research Centre in Applied Sciences  > Plant and Environmental Research Group > The synthesis and characterization of Al-Beta and all-silica Beta formed in fluoride and caustic media.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2436/30335
    Del.icio.us     LinkedIn     Citeulike     Connotea     Facebook     Stumble it!



Title: The synthesis and characterization of Al-Beta and all-silica Beta formed in fluoride and caustic media.
Authors: Brigden, Clive T.
Williams, Craig D.
Citation: Microporous and Mesoporous Materials, 100(1-3): 118-127
Publisher: Amsterdam: Elsevier
Journal: Microporous and Mesoporous Materials
Issue Date: 2007
URI: http://hdl.handle.net/2436/30335
DOI: 10.1016/j.micromeso.2006.10.017
Additional Links: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TH4-4MFK0YC-1&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=df644739c9f8459e96c70bcc1f71e664
Abstract: The influence of various parameters upon the synthesis of the BEA structure in fluoride and caustic media is investigated and results are compared and related to some previous studies in the literature. High crystalline, low faulted BEA structure has been made in an excess of fluoride (F−/SiO2 ratio of 1.5) across the entire gel Si/Al ratio range of 20 to ∞ using a fumed silica source and in the absence of seed crystals or stirring. Although, for gel Si/Al ratios >20, no aluminium was found in the products. The scope for further investigation of the effects of H2O content and stirring vs. non-stirring upon crystallinity and aluminium uptake, especially in conditions of lower fluoride concentration, is shown. Results from the caustic media syntheses agree with those from previous studies and it is found that the uptake of aluminium into the zeolite during synthesis is required for the formation of the BEA structure. Product characterization of Al-Beta confirms the framework incorporation of aluminium through increased d-spacings, the presence of tetrahedral coordinate aluminium and lowering of the FT-IR external asymmetric stretch and double bend vibration relative to an all-silica sample.
Type: Article
Language: en
Keywords: Geochemistry
Zeolites
Beta
Synthesis
Characterisation
Gels, aqueous fluoride
Caustic media
ISSN: 13871811
Appears in Collections: Plant and Environmental Research Group

Files in This Item:

There are no files associated with this item.



All Items in WIRE are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Fairtrade - Guarantees a better deal for Third World Producers

University of Wolverhampton, Wulfruna Street, Wolverhampton, WV1 1LY

Course enquiries: 0800 953 3222, General enquiries: 01902 321000,
Email: enquiries@wlv.ac.uk | Freedom of Information | Disclaimer and copyright | Website feedback | The University as a charity

OR Logo Powered by Open Repository | Cookies