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Screening of catalysts and effect of temperature for kinetic degradation studies of aromatic compounds during wet oxidation

Paper ID Volume ID Publish Year Pages File Format Full-Text
48701 46518 2007 10 PDF Available
Title
Screening of catalysts and effect of temperature for kinetic degradation studies of aromatic compounds during wet oxidation
Abstract

Catalytic wet air oxidation (CWO) of six model phenolic acids: syringic, vanillic, 3,4,5-trimethoxybenzoic, veratric, protocatechuic and trans-cinnamic acid present in wastewaters from olive oil mills was studied at different temperatures. Experiments completed in the presence of four commercially available catalysts, CuO-MnOx/Al2O3, CuO-ZnO/Al2O3, Fe2O3-MnOx and CuO-MnOx were compared with the ones related to various catalysts prepared in our laboratory (Ag-Ce-O, Mn-Ce-O, Mn-O, Ce-O). These catalysts showed a higher effective reduction of the total organic carbon (TOC) especially when the experiments were carried out with manganese oxide supported on ceria, an alternative and powerful catalyst to treat highly contaminated wastewaters containing phenolic compounds. Along the oxidation, acetic acid and phenol were detected and quantified by HPLC as the main intermediate species. Leaching, carbon adsorption as well as texture and morphology by SEM were analyzed and formation of whiskers at the catalyst surface was observed. Moreover, the kinetic parameters were obtained and co-oxidation of the phenolic compounds in the mixture was identified in our studies.

Keywords
Wastewater reaction engineering; Catalytic wet oxidation; Phenolic acids; Catalyst characterization; Kinetics
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Screening of catalysts and effect of temperature for kinetic degradation studies of aromatic compounds during wet oxidation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 73, Issues 1–2, 24 April 2007, Pages 193–202
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
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Full-text PDF Download
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