Introduction of Al into the HPM-1 framework by in situ generated seeds as an alternative methodology

Pergher, Sibele Berenice Castellã; Vinaches, Paloma; Rojas, Alex; Alencar, Ana Ellen V. de; Castellón, Enrique Rodríguez; Braga, Tiago P.

Introduction of Al into the HPM-1 framework by in situ generated seeds as an alternative methodology

Página do item simplificado Estatísticas

dc.contributor.author	Pergher, Sibele Berenice Castellã
dc.contributor.author	Vinaches, Paloma
dc.contributor.author	Rojas, Alex
dc.contributor.author	Alencar, Ana Ellen V. de
dc.contributor.author	Castellón, Enrique Rodríguez
dc.contributor.author	Braga, Tiago P.
dc.date.accessioned	2020-07-13T17:38:54Z
dc.date.available	2020-07-13T17:38:54Z
dc.date.issued	2018-09-13
dc.description.resumo	An alternative method for the introduction of aluminum into the STW zeolitic framework is presented. HPM-1, a chiral STW zeolite with helical pores, was synthesized in the pure silica form, and an aluminum source was added by in situ generated seeds. Displacements of the peak positions in the Al samples were found in the X-ray diffractograms, indicating the possible incorporation of the heteroatom into the framework. Using an analysis of the 29Si and 27Al magic-angle spinning nuclear magnetic resonance (MAS NMR) spectra, we concluded that the aluminum was effectively introduced into the framework. The (AlTETRAHEDRAL/AlOCTAHEDRAL) ratio and its textural properties were studied to explain the catalytic ethanol conversion results at medium temperatures. The sample with the lowest Si/Al ratio showed the best results due to its higher surface area and pore volume, in comparison to those observed for the sample with the highest Si/Al ratio, and due to its higher bulk tetrahedral aluminum content, in comparison to the intermediate Si/Al ratio sample. All catalysts were selective to ethylene and diethyl ether, confirming the presence of acidic sites	pt_BR
dc.identifier.citation	VINACHES, Paloma; ROJAS, Alex; ALENCAR, Ana de; CASTELLÓN, Enrique R.; BRAGA, Tiago; PERGHER, Sibele Berenice Castellã. Introduction of Al into the HPM-1 Framework by In Situ Generated Seeds as an Alternative Methodology. Applied Sciences, [s.l.], v. 8, n. 9, p. 1634 (11p.), 13 set. 2018. ISSN 2076-3417 versão online. Disponível em: https://www.mdpi.com/2076-3417/8/9/1634. Acesso em 13 jul. 2020. http://dx.doi.org/10.3390/app8091634	pt_BR
dc.identifier.doi	10.3390/app8091634
dc.identifier.issn	2076-3417
dc.identifier.uri	https://repositorio.ufrn.br/jspui/handle/123456789/29583
dc.language	en	pt_BR
dc.publisher	MDPI	pt_BR
dc.rights	Attribution 3.0 Brazil	*
dc.rights.uri	http://creativecommons.org/licenses/by/3.0/br/	*
dc.subject	STW zeolite	pt_BR
dc.subject	Aluminosilicate	pt_BR
dc.subject	Seeds	pt_BR
dc.subject	2-ethyl-1,3,4-trimethylimidazolium	pt_BR
dc.subject	Hydrofluoric media	pt_BR
dc.subject	Ethanol dehydration	pt_BR
dc.title	Introduction of Al into the HPM-1 framework by in situ generated seeds as an alternative methodology	pt_BR
dc.type	article	pt_BR