INVESTIGADORES
BUSTO Mariana
artículos
Título:
Influence of hydrothermal aging on the catalytic activity of sulfated zirconia
Autor/es:
MARIANA BUSTO; KIYOYUKI SHIMIZU; CARLOS R. VERA; JAVIER M. GRAU; CARLOS L. PIECK; MIGUEL A. DAMATO; MARIA TERESA CAUSA; M. TOVAR
Revista:
APPLIED CATALYSIS A-GENERAL
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2008 vol. 348 p. 173 - 182
ISSN:
0926-860X
Resumen:
The use of reflux aged sulfated zirconia catalysts for isomerization of short paraffins and isomerization-cracking of long paraffins was assessed. Hydrothermal aging of the gel greatly improved zirconia textural properties (specific surface area, sintering resistance, tetragonality, mesoporosity). The specific surface area of the reflux aged sulfated catalyst was 220 m2. Impregnation of reflux aged materials with sulfate produced materials which had very low activity in isomerization of n-butane. The effect of aging was explained in terms of a dissolution-precipitation process that eliminated specific sites of the gel that were responsible for much of the activity of the final catalyst. In the case of the hydroisomerization-cracking of long paraffins the effect was similar but less drastic due to the higher reactivity of this feedstock.
