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Ni supported on Mg–Al oxides for continuous catalytic wet air oxidation of Crystal Violet

Paper ID Volume ID Publish Year Pages File Format Full-Text
46068 46429 2012 6 PDF Available
Title
Ni supported on Mg–Al oxides for continuous catalytic wet air oxidation of Crystal Violet
Abstract

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 °C to 86.1% at 180 °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.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Ni/MgAlO catalyst. ► Catalytic wet air oxidation in trickle-bed reactor for Crystal Violet removal. ► Effect of the reaction variables was tested. ► The catalyst proved to be stable and efficient for the dye degradation.

Keywords
Catalytic wet air oxidation; Crystal Violet; Nickel; Trickle-bed reactor; Wastewater
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Ni supported on Mg–Al oxides for continuous catalytic wet air oxidation of Crystal Violet
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 125, 21 August 2012, Pages 166–171
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us