The catalytic wet air oxidation (WAO) of p-coumaric acid (PCA) has been investigated over Fe- and Zn-promoted ceria catalysts. The catalysts have been prepared by the coprecipitation method and have been characterized by X-ray diffraction (XRD), BET surface area, SEM-EDX and temperature programmed reduction (TPR). The oxidation reaction was carried out in a batch reactor under an air pressure of 2 MPa and in the temperature range 353-403 K. Fe-CeO2 catalysts, with 20-50 mol% of iron, were found more effective than the unpromoted and Zn-promoted ceria catalysts. On the basis of characterization data, it has been suggested that the higher activity of the Fe-promoted catalysts is related to the modification of the structural and redox properties of the ceria oxide catalyst on addition of iron. (C) 2002 Elsevier Science B.V. All rights reserved.
Wet air oxidation of p-coumaric acid over promoted ceria catalysts
NERI, Giovanni;PISTONE, Alessandro;MILONE, Candida;GALVAGNO, Signorino
2002-01-01
Abstract
The catalytic wet air oxidation (WAO) of p-coumaric acid (PCA) has been investigated over Fe- and Zn-promoted ceria catalysts. The catalysts have been prepared by the coprecipitation method and have been characterized by X-ray diffraction (XRD), BET surface area, SEM-EDX and temperature programmed reduction (TPR). The oxidation reaction was carried out in a batch reactor under an air pressure of 2 MPa and in the temperature range 353-403 K. Fe-CeO2 catalysts, with 20-50 mol% of iron, were found more effective than the unpromoted and Zn-promoted ceria catalysts. On the basis of characterization data, it has been suggested that the higher activity of the Fe-promoted catalysts is related to the modification of the structural and redox properties of the ceria oxide catalyst on addition of iron. (C) 2002 Elsevier Science B.V. All rights reserved.Pubblicazioni consigliate
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