Preparation and characterization of CeO2-Al2O3 aerogels supported ruthenium for catalytic wet air oxidation of p-hydroxybenzoic acid

作者：Triki Mohamed^*; Ksibi Zouhaier; Ghorbel Abdelhamid; Medina Francisco

来源：Journal of Sol-Gel Science and Technology, 2011, 59(1): 1-6.

DOI：10.1007/s10971-011-2452-5

• Sol-gel
• CeO2-Al2O3
• Ruthenium catalysts
• Catalytic wet air oxidation
• p-Hydroxybenzoic acid

Catalytic wet air oxidation of an aqueous solution of p-hydroxybenzoic acid was conducted over ruthenium catalysts (1 wt%) supported on CeO2-Al2O3 aerogels mixed oxides at 140 A degrees C and 50 bars of air. We study the effect of the amount of CeO2 in the catalyst. We found that the optimal cerium content in the Al2O3 support was 20 wt%. The activity of the Ru/Al2O3 and Ru/CeO2 was also tested for comparison. It was found that the addition of CeO2 on the alumina support improves the activity of Ru catalysts. The activity of the samples decreases in the following order: Ru/Ce-Al (20) > Ru/Ce-Al (10) > Ru/Ce-Al (5) a parts per thousand Ru/Al2O3 > Ru/CeO2. Samples characterization was performed by means of N-2 adsorption-desorption, XRD, UV-Vis, TPR, SEM and TEM.

• 出版日期2011-7