Oxidative degradation of lurgi coal-gasification wastewater with Mn2O3, Co2O3, and CuO catalysts in supercritical water / Yuzhen Wang in Industrial & engineering chemistry research, Vol. 51 N° 51 (Décembre 2012)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 51 N° 51 (Décembre 2012) . - pp. 16573-16579 Titre : Oxidative degradation of lurgi coal-gasification wastewater with Mn2O3, Co2O3, and CuO catalysts in supercritical water Type de document : texte imprimé Auteurs : Yuzhen Wang, Auteur ; ShuZhong Wang, Auteur ; Yang Guo, Auteur Année de publication : 2012 Article en page(s) : pp. 16573-16579 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : 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 [article] Oxidative degradation of lurgi coal-gasification wastewater with Mn2O3, Co2O3, and CuO catalysts in supercritical water [texte imprimé] / Yuzhen Wang, Auteur ; ShuZhong Wang, Auteur ; Yang Guo, Auteur . - 2012 . - pp. 16573-16579. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 51 (Décembre 2012) . - pp. 16573-16579 Mots-clés : 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

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