Publicação: Preparação e propriedades de zeólitas faujasita contendo cátions amônio
Carregando...
Data
2010
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Sociedade Brasileira de Química
Tipo
Artigo
Direito de acesso
Acesso aberto
Resumo
Sodium faujasite zeolites with Si/Al ratio of 1.4 and 2.5 were exchanged with methylammonium cations. The influence of framework aluminum and ion exchange degree in their basic properties were evaluated. These properties were assessed in the Knoevenagel catalytic condensation. The sodium ion exchange was restricted to the supercavity and the exchange degree depended on the cation volume and on the Si/Al ratio. The higher catalytic activity is achieved for the zeolite with the lower Si/Al ratio exchanged with the monomethylammonium cation. The best performance of this catalyst is attributed to the higher basicity in combination with elevated micropore volume.
Descrição
Palavras-chave
Idioma
Português
Como citar
Química Nova. Sociedade Brasileira de Química, v. 33, n. 5, p. 1077-1081, 2010.
