Mesopore formation during steam dealumination of zeolites: influence of initial aluminum content and crystal size

Autor:	Roger Dutartre, Francesco Di Renzo, Louis Charles de Menorval, François Fajula, Philippe Schulz, Daniel McQueen
Rok vydání:	1996
Předmět:	chemistry.chemical_classification General Engineering Analytical chemistry Sorption General Chemistry Molecular sieve complex mixtures Crystal Hydrocarbon chemistry Chemical engineering Desorption General Materials Science Texture (crystalline) Zeolite Mesoporous material
Zdroj:	Microporous Materials. 6:311-320
ISSN:	0927-6513
DOI:	10.1016/0927-6513(96)00039-9
Popis:	The texture of a series of dealuminated mazzites, with different compositions and crystal sizes, prepared by combined steam and acid treatments has been investigated by N2 and hydrocarbon sorption, TEM and 129Xe NMR spectroscopy. Crystal size is shown to affect the fraction of mesopores with ink-bottle openings leading to a steep nitrogen desorption at a relative pressure p p 0 of 0.42. The composition of the parent zeolite determines the volume and the size of the mesopores, both of them decreasing with the aluminum content. Results are compared to those obtained on five additional zeolite structural types and lead to a unique relation between the mesopore volume generated by dealumination and the aluminum fraction in the starting solid.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c787a2b2366f8f8720ee6dbe92f05082 https://doi.org/10.1016/0927-6513(96)00039-9 Zobrazit plný text záznamu Full Text from ScienceDirect