Preparation and characterization of lanthanum palygorskite clays as acid catalysts
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 t...
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ri-123456789-314652022-09-15T21:17:05Z 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 Lanthanum Palygorskite Mineral clays Characterization 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 2021-02-10T18:45:36Z 2021-02-10T18:45:36Z 2002-10-07 article 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. 0925-8388 https://repositorio.ufrn.br/handle/123456789/31465 10.1016/S0925-8388(02)00384-5 en Attribution 3.0 Brazil http://creativecommons.org/licenses/by/3.0/br/ application/pdf Elsevier |
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| language |
English |
| topic |
Lanthanum Palygorskite Mineral clays Characterization |
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Lanthanum Palygorskite Mineral clays Characterization 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 |
| description |
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 |
| format |
article |
| author |
Melo, Dulce Maria de Araújo Ruíz, Juan Alberto Chavez Melo, Marcus Antônio de Freitas Vitor Sobrinho, Eledir Martinelli, Antonio Eduardo |
| author_facet |
Melo, Dulce Maria de Araújo Ruíz, Juan Alberto Chavez Melo, Marcus Antônio de Freitas Vitor Sobrinho, Eledir Martinelli, Antonio Eduardo |
| author_sort |
Melo, Dulce Maria de Araújo |
| title |
Preparation and characterization of lanthanum palygorskite clays as acid catalysts |
| title_short |
Preparation and characterization of lanthanum palygorskite clays as acid catalysts |
| title_full |
Preparation and characterization of lanthanum palygorskite clays as acid catalysts |
| title_fullStr |
Preparation and characterization of lanthanum palygorskite clays as acid catalysts |
| title_full_unstemmed |
Preparation and characterization of lanthanum palygorskite clays as acid catalysts |
| title_sort |
preparation and characterization of lanthanum palygorskite clays as acid catalysts |
| publisher |
Elsevier |
| publishDate |
2021 |
| url |
https://repositorio.ufrn.br/handle/123456789/31465 |
| work_keys_str_mv |
AT melodulcemariadearaujo preparationandcharacterizationoflanthanumpalygorskiteclaysasacidcatalysts AT ruizjuanalbertochavez preparationandcharacterizationoflanthanumpalygorskiteclaysasacidcatalysts AT melomarcusantoniodefreitas preparationandcharacterizationoflanthanumpalygorskiteclaysasacidcatalysts AT vitorsobrinhoeledir preparationandcharacterizationoflanthanumpalygorskiteclaysasacidcatalysts AT martinelliantonioeduardo preparationandcharacterizationoflanthanumpalygorskiteclaysasacidcatalysts |
| _version_ |
1773959201001832448 |