Preparation and characterization of a thin continuous faujasite membrane on tubular porous mullite support

The progressive increase of VOC emissions, the growing information of their hazardous nature, and the resulting increasingly more restrictive environmental regulations in the industrialized countries have induced the development of different methods for VOCs abatement. Membrane separation process is...

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Bibliographic Details
Published in:	Desalination Vol. 220; no. 1-3; pp. 65 - 71
Main Authors:	Asghari, M., Mohammadi, T., Aziznia, A., Danayi, M.R., Moosavi, S.H., Alamdari, R.F., Agand, F.
Format:	Journal Article Conference Proceeding
Language:	English
Published:	Amsterdam Elsevier B.V 01-03-2008 Elsevier
Subjects:	Applied sciences Chemical engineering Crystallization, leaching, miscellaneous separations Exact sciences and technology Faujasite membrane Hydrothermal Membrane separation (reverse osmosis, dialysis...) Mullite NaX-type zeolite Pollution Tubular ceramic support Mullite Faujasite membrane Hydrothermal NaX-type zeolite Tubular ceramic support Scanning electron microscopy Crystallization Volatile organic compound Zeolite Seeding Powder Calcining Membrane separation Preparation Separation process Lixiviation Pollution abatement Regulation Porosity Ceramic materials
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Summary:	The progressive increase of VOC emissions, the growing information of their hazardous nature, and the resulting increasingly more restrictive environmental regulations in the industrialized countries have induced the development of different methods for VOCs abatement. Membrane separation process is a good alternative to gain this purpose. In this paper, a high quality faujasite membrane was prepared. Tubular porous mullite supports were fabricated from Kaolin clay by a temperature-programmed calcination treatment, following a leaching treatment. As observed in SEM photographs, the porosity of the support increased during the leaching treatment. The NaX zeolite powders were prepared hydrothermally and characterized with XRD and SEM. The best crystalline powder and the corresponding starting gel were respectively used for seeding treatment and hydrothermal crystallization of a thin, continuous and fully covering X-type zeolitic top layer on outer surface of the cylindrical support. The membrane was characterized with XRD and SEM.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0011-9164 1873-4464
DOI:	10.1016/j.desal.2007.01.022