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The sub/supercritical water oxidation (SCWO) of wastewater with high concentrations of pollutants from tall oil rosin production base was studied under the temperature range of 3208C-4208C and the pressure range of 11-25 MPa. The results showed that after pretreatment with Ca(OH) 2 for SO remained which inhibited the oxidation activity by reducing the concentration of hydroxyl radicals (•OH). Since the wastewater compounds were mainly cyclic organic materials, higher O 2 contents (stoichiometric ratio over 2.5) and temperatures (over 3808C) are favorable for TOC removal. With O 2 SR 5 2.5 and T 5 4208C, the TOC removal reached almost 100% (99.89%) in 30 min. A global kinetic model for TOC removal during SCWO treatment was built during the research. The kinetic data acquired through the model were fitted to a power-law function, and the data correlated well with the experimental data.

Abstract. Phenol hydrogenation over the Pd/ZrO 2 catalyst has been carried out using ethanol as hydrogen source. The reaction temperature, catalyst and ethanol quantity are found to be influencing factors for effective phenol conversion. In all cases, low quantity (5%~10%) of ethanol and high temperature is efficient for a high phenol conversion. The results show that low quantity (5%~10%) of ethanol is efficient for high cyclohexanone selectivity at low temperature (573K). However, the selectivity of cyclohexanone, cyclohexanol and cyclohexane are insensitive to the ethanol quantity at high temperature (653K). It seems that ethanol plays an important dual role: as hydrogen source and as additive to control the phenol conversion and products selectivity.