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Title: Preparation and characterization of lanthanum palygorskite clays as acid catalysts
Authors: Melo, Dulce Maria de Araújo
Ruíz, Juan Alberto Chavez
Melo, Marcus Antônio de Freitas
Vitor Sobrinho, Eledir
Martinelli, Antonio Eduardo
Keywords: Lanthanum;Palygorskite;Mineral clays;Characterization
Issue Date: 7-Oct-2002
Publisher: Elsevier
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. Disponível em: Acesso em: 25 nov. 2020.
Portuguese Abstract: 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
ISSN: 0925-8388
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CT - DEQ - Artigos publicados em periódicos
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