Artículo
Characterization of silica supported chromium complexes
Fecha de publicación:
03/2000
Editorial:
Planta Piloto de Ingeniería Química
Revista:
Latin American Applied Research
ISSN:
0327-0793
e-ISSN:
1851-8796
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The Cr/SiO2 catalysts were prepared via the deposition of mononuclear and binuclear chromium (III) ammine complexes on silica. The influence of chromium loading and calcination temperatura upon the type of species formed was determined. FTIR and Raman studies revealed the presence of Cr(VI) species as monomers and dimers in calcined catalysts and the existence of a chemical interaction between the complex chromium ions and the support. Futhemore, IR of adsorbed pyridine showed the presence of Lewis centers just before calcination. After calcination Brönsted sites were developed, these sites were related to the presence of Cr(VI) species. The relative concentration of such centers depends on the ammount of chromium exchanged.
Palabras clave:
Chromium Complexes
,
Chromium-Silica
,
Ion Exchange
,
Pyridine
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(INIQUI)
Articulos de INST.DE INVEST.PARA LA INDUSTRIA QUIMICA (I)
Articulos de INST.DE INVEST.PARA LA INDUSTRIA QUIMICA (I)
Citación
Parentis, Monica Liliana; Bonini, Norberto Alejandro; Gonzo, Elio Emilio; Characterization of silica supported chromium complexes; Planta Piloto de Ingeniería Química; Latin American Applied Research; 30; 1; 3-2000; 41-50
Compartir