Gold catalysts supported on titanium oxide for catalytic wet air oxidation of succinic acid |
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| Affiliation: | 1. Institut de Recherches sur la Catalyse, UPR 5401-CNRS, 2, Avenue Albert Einstein, 69626 Villeurbanne Cedex, France;2. Laboratoire de Réactivité de Surface, UMR 7609-CNRS, Université P. et M. Curie, 4 Place Jussieu, Tour 54-55, 75252 Paris Cedex 05, France;1. Department of Hygienic Chemistry, Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan;2. Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Kumamoto 860-0082, Japan;1. Giotto Loess Research Group, Geography Department, Leicester University, Leicester LE1 7RH, UK;2. Geography Department, RWTH Aachen University, Templergraben 55, 52056 Aachen, Germany |
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| Abstract: | Catalytic wet air oxidation of a representative organic compound (aqueous solution of 5 g l−1 succinic acid at 190 °C and 50 bar total air pressure) was investigated over gold on titania prepared from the deposition–precipitation method (with urea or NaOH) and compared to experiments performed over a Ru/TiO2 catalyst. These preliminary results demonstrate that gold catalysts are efficient for the degradation of this organic acid. The catalytic activity is strongly dependent on the gold particle size characterized by transmission electron microscopy (TEM) with smaller particles producing higher turnover frequencies. Modification of metal dispersion occurs during reaction, leading to minor activity. |
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