Fenton pretreatment in the catalytic wet oxidation of phenol / Aurora Santos in Industrial & engineering chemistry research, Vol. 49 N° 12 (Juin 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 12 (Juin 2010) . - pp. 5583–5587 Titre : Fenton pretreatment in the catalytic wet oxidation of phenol Type de document : texte imprimé Auteurs : Aurora Santos, Auteur ; Pedro Yustos, Auteur ; Sergio Rodriguez, Auteur Année de publication : 2010 Article en page(s) : pp. 5583–5587 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Catalytic wet oxidation Phenol (PhOH) aqueous solutions Continuous three-phase reactor FR pretreatment Résumé : Catalytic wet oxidation (CWO) of 1000 mg/L of phenol (PhOH) aqueous solutions has been carried out using a commercial activated carbon as catalyst, placed in a continuous three-phase reactor at 16 bar, and temperature was changed in the interval 127−160 °C. Pure oxygen was fed as gaseous phase. Pollutant conversion, mineralization, intermediate distribution, and toxicity were measured at the reactor exit. The catalyst weight (W) to liquid flow rate (QL) ratio was varied from 0.3 to 17.5 gACmin/mL. Fenton reagent (FR) has been applied to the same phenolic aqueous samples using different amounts of H2O2 (between 10 and 100% of the stoichiometric dose) and 10 mg/L of Fe2+, in a batch way at 50 °C. An integrated process has been proposed that combines FR as pretreatment of the CWO process. In the FR step, 10% of H2O2, 10 mg/L of Fe2+, and reaction times shorter than 40 min are used. Efluent from FR step is fed to the CWO reactor at 127 °C. High mineralization (80−90%) and total detoxification of the effluent was obtained at the reactor exit using W/QL values lower than 10 g·min/mL. Therefore, the FR pretreatment enhances remarkably the efficiency of the CWO at moderate temperature conditions. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1004948 [article] Fenton pretreatment in the catalytic wet oxidation of phenol [texte imprimé] / Aurora Santos, Auteur ; Pedro Yustos, Auteur ; Sergio Rodriguez, Auteur . - 2010 . - pp. 5583–5587. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 12 (Juin 2010) . - pp. 5583–5587 Mots-clés : Catalytic wet oxidation Phenol (PhOH) aqueous solutions Continuous three-phase reactor FR pretreatment Résumé : Catalytic wet oxidation (CWO) of 1000 mg/L of phenol (PhOH) aqueous solutions has been carried out using a commercial activated carbon as catalyst, placed in a continuous three-phase reactor at 16 bar, and temperature was changed in the interval 127−160 °C. Pure oxygen was fed as gaseous phase. Pollutant conversion, mineralization, intermediate distribution, and toxicity were measured at the reactor exit. The catalyst weight (W) to liquid flow rate (QL) ratio was varied from 0.3 to 17.5 gACmin/mL. Fenton reagent (FR) has been applied to the same phenolic aqueous samples using different amounts of H2O2 (between 10 and 100% of the stoichiometric dose) and 10 mg/L of Fe2+, in a batch way at 50 °C. An integrated process has been proposed that combines FR as pretreatment of the CWO process. In the FR step, 10% of H2O2, 10 mg/L of Fe2+, and reaction times shorter than 40 min are used. Efluent from FR step is fed to the CWO reactor at 127 °C. High mineralization (80−90%) and total detoxification of the effluent was obtained at the reactor exit using W/QL values lower than 10 g·min/mL. Therefore, the FR pretreatment enhances remarkably the efficiency of the CWO at moderate temperature conditions. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1004948

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