The influence of swelling agents molecular dimensions on lamellar morphology of MWW-type zeolites active for fructose conversion

Pergher, Sibele Berenice Castellã; Schwanke, Anderson Joel; Díaz, Urbano; Corma, Avelino

The influence of swelling agents molecular dimensions on lamellar morphology of MWW-type zeolites active for fructose conversion

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dc.contributor.author	Pergher, Sibele Berenice Castellã
dc.contributor.author	Schwanke, Anderson Joel
dc.contributor.author	Díaz, Urbano
dc.contributor.author	Corma, Avelino
dc.date.accessioned	2020-07-14T14:59:25Z
dc.date.available	2020-07-14T14:59:25Z
dc.date.issued	2017-12
dc.description.resumo	A new route to obtain pillared, disordered or desilicated MWW-type zeolites was developed assisted by quaternary ammonium surfactants with different hydrocarbon tail size acting as swelling agents (C12TAþ, C16TAþ, C18TAþ) and TPAþ both exchanged to their hydroxide forms instead of only one swelling agent (CnTAþ or TPAþ) in hydroxide form. Effect of surfactant concentration and swelling conditions were determinant to obtain MWW-type zeolites with different lamellar organization and spatial distribution of individual zeolitic layers. Specifically, soft swelling at 25 C with C12TAþ preserved layer structure reaching a final disordered/pillared structure while pillared structures are obtained in the case of materials swollen with C16TAþ and C18TAþ. Aggressive swelling processes at 80 C favored desilication, damaging the layers structure in case of C12TAþ while pillared materials are obtained after swollen with C16TAþ and C18TAþ surfactants. It was proved that both swelling agents in hydroxide forms combining with swelling and pillaring procedure influenced on physico-chemical and morphological nature of MWW-type materials due to the particular conditions used. The obtained derivative MWW zeolites with different morphology, order and accessibility levels were firstly evaluated by catalytic dehydration of fructose to 5-hydroxymethylfurfural (5-HMF) showing superior activity compared to beta zeolites reported in literature	pt_BR
dc.identifier.citation	SCHWANKE, Anderson Joel; PERGHER, Sibele Berenice Castellã; DÍAZ, Urbano; CORMA, Avelino. The influence of swelling agents molecular dimensions on lamellar morphology of MWW-type zeolites active for fructose conversion. Microporous And Mesoporous Materials, [s.l.], v. 254, p. 17-27, dez. 2017. ISSN 1387-1811. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S1387181116305273?via%3Dihub. Acesso em: 14 jul. 2020. http://dx.doi.org/10.1016/j.micromeso.2016.11.007.	pt_BR
dc.identifier.doi	10.1016/j.micromeso.2016.11.007
dc.identifier.issn	1387-1811
dc.identifier.uri	https://repositorio.ufrn.br/jspui/handle/123456789/29599
dc.language	en	pt_BR
dc.publisher	Elsevier	pt_BR
dc.rights	Attribution 3.0 Brazil	*
dc.rights.uri	http://creativecommons.org/licenses/by/3.0/br/	*
dc.subject	MWW zeolites	pt_BR
dc.subject	Swelling	pt_BR
dc.subject	Pillaring	pt_BR
dc.subject	Hierarchical materials	pt_BR
dc.subject	Fructose dehydration	pt_BR
dc.title	The influence of swelling agents molecular dimensions on lamellar morphology of MWW-type zeolites active for fructose conversion	pt_BR
dc.type	article	pt_BR