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Biphasic oxidation reactions promoted by amphiphilic catalysts based on red mud residue

Paper ID Volume ID Publish Year Pages File Format Full-Text
45346 46410 2014 8 PDF Available
Title
Biphasic oxidation reactions promoted by amphiphilic catalysts based on red mud residue
Abstract

•Biphasic oxidations of contaminants were promoted by RM amphiphilic catalysts.•The catalysts promoted up to 100% removal of Sudan IV, thiophene, DBT and quinoline.•Catalysts promote a reversible emulsion between contaminated phase and oxidant phase.•Catalysts also catalyze H2O2 activation by Fenton reaction.•Oxidized contaminants are extracted by aqueous phase and clean the organic phase.

Biphasic oxidation reactions of organic contaminants with H2O2 were promoted by amphiphilic catalysts prepared from red mud residue and carbon nanostructures. Contaminants oxidation is especially important for petroleum treatment, since S and N compounds are extremely unwanted mainly due to environmental issues. Also, government regulations around the levels of these pollutants in fuels are becoming increasingly strict. The amphiphilic catalysts were tested in oxidation of different model molecules: Sudan IV lipophilic dye, tiophene, dibenzothiophene and quinoline and showed very good removal, reaching 100% of contaminants oxidation. The amphiphilic catalysts act in two steps of biphasic oxidation: (i) favor the formation of a reversible emulsion between the organic contaminated phase and the aqueous oxidized phase and (ii) catalyze Fenton reaction. After reaction, the emulsion can be easily separated by a magnetic process into two phases: decontaminated organic phase and aqueous phase with oxidized contaminants.

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Keywords
Red mud; Fenton; Biphasic reactions; Amphiphilic catalyst
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Biphasic oxidation reactions promoted by amphiphilic catalysts based on red mud residue
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 144, January 2014, Pages 144–151
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
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Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us