| Paper Name |
Oxidative Degradation of Lurgi Coal-Gasification Wastewater with Mn2O3, Co2O3, and CuO Catalysts in Supercritical Water |
| Author |
Wang Yuzhen, Wang Shuzhong, Guo Yang |
| Publication/Completion Time |
2012-12-26 |
| Magazine Name |
Industrial and Engineering Chemistry Research |
| Vol |
51(51) |
| Related articles |
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| Paper description |
Lurgi coal-gasification wastewater was degraded in supercritical water using Mn2O3, Co2O3, and CuO as catalysts. The experiments were performed in a batch reactor at temperatures of 380-460 degrees C and oxygen ratios of 1.5-3.5. The results involved evaluation of TOC and NH3-N removal efficiencies; detection of the main products in the effluent; XRD, SEM, and BET analyses of the catalysts; and detection of metal ions leached from the catalysts. Maximum TOC and NH3-N removals were found with Co2O3 catalyst at 460 degrees C and OR = 3.5. The effluent quality could meet class-I criteria of the Integrated Wastewater Discharge Standard (GB 8978-1996). The catalytic effects on pollutant removal were in the order Co2O3 > Mn2O3 > CuO. The major phase of Mn2O3 transformed into MnO2 with a decreasing BET surface area at 460 degrees C and an oxygen ratio of 3.5. Serious Cu-ion leaching occurred during the process and intensified with increasing temperature. |
(创新港)
