Caracterização e propriedades catalíticas da zeolita HZSM5 modificada com nióbio

Carregando...
Imagem de Miniatura

Data

1997-02-01

Título da Revista

ISSN da Revista

Título de Volume

Editor

Sociedade Brasileira de Química

Resumo

HZSM5 zeolite was modified by exchanging proton by niobium (V). Several samples were obtained with various degrees of exchange. Pore volumes and acidity were measured to characterize these exchanged zeolites. Catalytic properties were evaluated with two reaction tests: m-xylene transformation and n-heptane cracking. The introduction of niobium on HZSM5 zeolite decreases the diffusion coefficient of 2-methyl-pentane and increases the zeolite acidity. The sample containing niobium are initially more active in cracking of n-heptane and m-xylene isomerization than HZSM5 alone.

Descrição

Palavras-chave

HZSM5 zeolite, niobium exchange, pore volume, acidity

Como citar

Química Nova. Sociedade Brasileira de Química, v. 20, n. 1, p. 9-13, 1997.