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Brazilian Journal of Chemical Engineering

Print version ISSN 0104-6632On-line version ISSN 1678-4383


RODRIGUES, M.G.F.; MAGNOUX, P.  and  GUISNET, M.. Influence of hydrothermal treatment on the acid and redox functions of a Ga/HZSM5 catalyst . Braz. J. Chem. Eng. [online]. 2000, vol.17, n.1, pp.99-103. ISSN 1678-4383.

After steaming at 530° C for 30 minutes and for 6 hours, a Ga/HZSM5 catalyst was characterized by three model reactions (meta-xylene isomerization, propane aromatization and methylcyclohexane transformation). The activity and selectivity of this catalyst were compared to those of a fresh Ga/HZSM5 catalyst. It was demonstrated that hydrothermal treatment provokes a significant decrease in the dehydrogenation activity of the gallium species and a small decrease in the protonic acidity of the catalyst.

Keywords : Ga/HZSM5 catalyst; propane; deactivation by steaming.

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