[Catalytic wet oxidation of simulated wastewater succinic acid aqueous solution]

TiO2 supports and Ru-TiO2 catalysts were characterized such as resistance to compression, specific area and crystalline structure. Activities of Ru-TiO2 catalysts in catalytic wet oxidation of succinic acid aqueous solution were studied. When loading same content of Ru on support, the larger of specific area and pore volume of support the higher of catalytic activities. Activities of catalyst made by surface treated support were higher than not treated support(COD removal increased about 10%). Reaction was greatly influenced by temperature and pH value. When the reaction conditions were 270 degrees C, pH = 11.00, starting pressure 2.3 MPa, reacting pressure 7.1 MPa, 30 min, COD removal was at the range of 67.4%-95.4%. The catalysts remained high activities and stability after 12 times of reaction and kept COD removal great than 99%, NH3-N removal reached to 100% in a month running on a 200 L/d reactor.