Resumo

BENITO, H. E. et al. Síntesis y caracterización de silicato mesoporoso modificado con circonio y sulfato. Superf. vacío [online]. 2015, vol.28, n.3, pp.86-91. ISSN 1665-3521.

Mesoporous silicate were synthesized by a not hydrothermal method and the acid sites were promote by adding zirconium and sulfate ions. The maximum acid strength of the mesoporous silicate was promoted by addition of zirconium during the synthesis process and sulfate ions was add by insipient impregnation, after the mesoporous silicate synthesis. The materials were characterized by TGA, XRD, FT-IR, BET, potentiometric titration with n-butylamine, SEM and TEM techniques. The catalytic activity of the materials was evaluated for the ethanol dehydratation. The zirconium atoms and sulfate ions incorporation had a favorable impact on the acid strength of sites going from -42 to 143 mV. The hexagonal arrangement mesoporous material is slightly affected, indicating that ZrO2 nano crystals are within the silicate matrix. At the same way affected the sulfate ions presence.

Palavras-chave : Mesoporous silicate; Acidity; Dehydration.

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