| Titre : | Oxidative degradation of lurgi coal-gasification wastewater with Mn2O3, Co2O3, and CuO catalysts in supercritical water (2012) |
| Auteurs : | Yuzhen Wang, Auteur ; ShuZhong Wang, Auteur ; Yang Guo, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 51 N° 51, Décembre 2012) |
| Article en page(s) : | pp. 16573-16579 |
| Note générale : | Industrial chemistry |
| Langues : | Anglais |
| Tags : | Supercritical sta Catalyst Waste water Coal gasification Chemical degradation Oxidation Oxidative |
| Résumé : | 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 °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 °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 °C and an oxygen ratio of 3.5. Serious Cu-ion leaching occurred during the process and intensified with increasing temperature. |
| ISSN : | 0888-5885 |
| En ligne : | http://cat.inist.fr/?aModele=afficheN&cpsidt=26755620 |
