期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 125, 期 -, 页码 166-171出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2012.05.030
关键词
Catalytic wet air oxidation; Crystal Violet; Nickel; Trickle-bed reactor; Wastewater
资金
- Ministerio de Economia y Competitividad [CTQ2011-27169]
- CONSOLIDER Program through TRAGUA Network [CSD2006-44]
- Comunidad de Madrid through REMTAVARES Network [S2009/AMB-1588]
The continuous catalytic oxidation of aqueous Crystal Violet (CV) solutions has been investigated using a nickel catalysts (7 wt%) supported over Mg-Al mixed oxides in a trickle-bed reactor. The influence of the temperature, pressure, gas flow and dye initial concentration were studied in the catalytic wet air oxidation of CV. The catalyst showed a very stable activity up to 350 h on stream with an average total organic carbon (TOC) conversion of 64%. CV and TOC removal were very sensitive to the temperature. Dye conversion augmented from 44.7% at 120 degrees C to 86.1% at 180 degrees C Dye conversion varied from 62.6 to 18.4%, TOC from 59.5 to 18.7% and TN from 66.6 to 14.0% within 10 to 50 ppm of initial dye concentration. The leaching of Ni was 6 wt% of the initial metal present in the catalyst and a 0.59% of carbonaceous deposit was formed onto the catalyst surface. (C) 2012 Elsevier B.V. All rights reserved.
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