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Wastewater treatment by catalytic wet air oxidation in a continuous pilot-scale trickle bed reactor

Authors Wu, Qiang
Issue Date 2004
Summary This work is an in-depth study on the application of a catalytic wet air oxidation (CWAO) process for continuous wastewater treatment. To this end, first various catalysts were prepared and their feasibility for phenol degradation was evaluated in a batch slurry reactor. Activated carbon-based copper (Cu/AC) was found to be the best catalyst. A fully instrumented pilot scale trickle bed reactor (TBR) was then used as a reactor in which oxygen and aqueous phenol were fed co-currently over the Cu/AC catalyst. This TBR proved to be able to detoxify effectively wastewater containing phenol. A systematic study was conducted to investigate the mass transfer and reaction processes in the TBR. Both gas-to-liquid and liquid-to-solid mass transfer-related parameters were measured and correlated. The reaction kinetics for phenol degradation by both copper salts (homogeneous catalyst) and Cu/AC (heterogeneous catalyst) were examined. Kinetics models for representing the rate data were established and validated. On the basis of the above results, a comprehensive mathematical model for the TBR was developed. The model was found to be capable of predicting the phenol conversion over a range of operational conditions.
Note Thesis (Ph.D.)--Hong Kong University of Science and Technology, 2004
Language English
Format Thesis
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