Phenol oxidation in a periodically operated Trickle Bed reactor””preparation and characterization of wet-proofed catalyst for oxidation of phenol solutions.

P. MASSA; A. AYUDE; F. IVORRA; R. FENOGLIO; P. HAURE

CATALYSIS TODAY

Año: 2005 vol. 630 p. 107 - 108

0920-5861

AbstractThe present contribution reports an experimental study of the oxidation of phenol aqueous solutions over a CuO/g-Al2O3 catalyst carriedout in a trickle bed reactor. Steady-state as well as periodic on–off experiments were performed. In the range of operating conditions studied, itwas observed that liquid flow modulation has a mild effect on phenol conversion but it does affect product distribution, favoring themineralization process. When the liquid flow is halted, the intermediate products remain inside the catalyst and are further oxidized to finalproducts. The residence time of the intermediates and the average oxygen concentrations inside the catalytic pellet during liquid flowmodulation are higher than those attained in steady-state operation.# 2005 Elsevier B.V. All rights reserved.