Preparation and characterization of lanthanum palygorskite clays as acid catalysts

Melo, Dulce Maria de Araújo; Ruíz, Juan Alberto Chavez; Melo, Marcus Antônio de Freitas; Vitor Sobrinho, Eledir; Martinelli, Antonio Eduardo

Preparation and characterization of lanthanum palygorskite clays as acid catalysts

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dc.contributor.author	Melo, Dulce Maria de Araújo
dc.contributor.author	Ruíz, Juan Alberto Chavez
dc.contributor.author	Melo, Marcus Antônio de Freitas
dc.contributor.author	Vitor Sobrinho, Eledir
dc.contributor.author	Martinelli, Antonio Eduardo
dc.date.accessioned	2021-02-10T18:45:36Z
dc.date.available	2021-02-10T18:45:36Z
dc.date.issued	2002-10-07
dc.description.resumo	Palygorskite clays containing 2, 4, 6 or 10% lanthanum (w/w) were prepared by ion-exchange from acid-leached natural clays. Samples were characterized by chemical and thermogravimetric analysis, X-ray diffraction, infrared spectroscopy, and N2 adsorption. Isopropyl alcohol was transformed in order to improve the acid behavior of the material. The introduction of La3+ did not change the structure of the palygorskite. Surface areas as high as 177.6 m2 g−1 were measured for catalysts containing 2% lanthanum. This material also showed a very good activity for alcohol dehydration	pt_BR
dc.identifier.citation	MELO, Dulce Maria de Araújo; RUIZ, Juan Alberto Chavez; MELO, Marcus Antônio de Freitas; VITOR SOBRINHO, Eledir; MARTINELLI, Antonio Eduardo. Preparation and characterization of lanthanum palygorskite clays as acid catalysts. Journal Of Alloys And Compounds, [S.L.], v. 344, n. 1-2, p. 352-355, out. 2002. Elsevier. http://dx.doi.org/10.1016/s0925-8388(02)00384-5. Disponível em: https://www.sciencedirect.com/science/article/pii/S0925838802003845. Acesso em: 25 nov. 2020.	pt_BR
dc.identifier.doi	10.1016/S0925-8388(02)00384-5
dc.identifier.issn	0925-8388
dc.identifier.uri	https://repositorio.ufrn.br/handle/123456789/31465
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	Lanthanum	pt_BR
dc.subject	Palygorskite	pt_BR
dc.subject	Mineral clays	pt_BR
dc.subject	Characterization	pt_BR
dc.title	Preparation and characterization of lanthanum palygorskite clays as acid catalysts	pt_BR
dc.type	article	pt_BR