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Application of Ni supported over mixed Mg–Al oxides to crystal violet wet air oxidation: The role of the reaction conditions and the catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
46510 46440 2012 9 PDF Available
Title
Application of Ni supported over mixed Mg–Al oxides to crystal violet wet air oxidation: The role of the reaction conditions and the catalyst
Abstract

This study explores the ability of nickel catalysts supported over Mg–Al mixed oxides (Ni/HT) by incipient wetness impregnation technique for the catalytic wet air oxidation of aqueous crystal violet solutions. The effect of operational conditions such as temperature, pressure, pH, presence of the catalyst and initial dye concentration has been tested. It has been demonstrated that Ni/HT is an efficient catalyst for the CWAO of crystal violet (CV) at mild reaction conditions. The reaction which was carried out at its natural pH, showed to be the most efficient when Ni/HT was employed. The catalyst does not lose any of its activity in the recycling experiments performed, when CV degradation is considered.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Ni supported over hydrotalcite calcined precursors as catalyst. ► Catalytic wet air oxidation in batch reactor for crystal violet removal. ► Effects of temperature, pressure, pH and initial dye concentration were tested. ► The catalyst proved to be stable and efficient for the dye degradation.

Keywords
Catalyst; Colour; Dye; Nickel; Wastewater
First Page Preview
Application of Ni supported over mixed Mg–Al oxides to crystal violet wet air oxidation: The role of the reaction conditions and the catalyst
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 111–112, 12 January 2012, Pages 586–594
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis