Degradation of aniline by mediated electrochemical Oxidation (MEO) process Vladimir Bobrov , Sang Joon Chung, S. Balaji & Il Shik Moon * (Dept. of Chemical Engineering, Sunchon National University) Clean Technology Pilot Laboratory Sunchon National University
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Degradation of aniline by mediated electrochemical
Oxidation (MEO) process
Vladimir Bobrov, Sang Joon Chung, S. Balaji & Il Shik Moon*
(Dept. of Chemical Engineering, Sunchon National University)
Clean Technology Pilot Laboratory
Sunchon National University
Introduction
Offers attractive route for the destruction of organic pollutants
Metallic ion in the oxidized form in an acid acts as a mediator
Mediator ion will oxidize organic pollutants into CO2 and H2O
Metallic ion constantly undergoing oxidation and reduction
Major byproducts are CO2 and H2O
Highlights of Mediated Electrochemical Oxidation (MEO)
Aniline as Target Organic Pollutant
Aniline is a major by-product in petro-chemical and coal-tar
industries
Aniline will polymerize into more toxic poly aniline if not removed
Clean Technology Pilot Laboratory
Sunchon National University
Mediated Electrochemical Oxidation(MEO)
Anode
Regeneration of Ce4+
Ce3+ → Ce4+ + e-
Oxidation Reaction
Ce4+ + Organics → Ce3+ + CO2 + Inorganics
Oxidation
Ce4+
Reduction
Ce3+
Organics
Inorganics,
CO2
e-
Clean Technology Pilot Laboratory
Sunchon National University
Object of this study
• To Apply MEO Technology to Analyze the Destruction of High
Concentrations of Aniline, under different solution
temperatures
• To evaluate the pattern of redox potential and CO2 generation,
during the destruction of aniline
• To compare the theoretical and experimental values of Ce(IV)
requirement for aniline destruction
Clean Technology Pilot Laboratory
Sunchon National University
Experimental
Fig. 1. Schematic of MEO Process
Clean Technology Pilot Laboratory
Sunchon National University
MEO Solution
Tank
Silyine Pump
Reactor
Pt Electrode
ScrubberCO2 Analyzer
Multi-Meter
N2 Cylinder
Experimental
Analysis
Estimation of this study
Ce3+/Ce4+ redox potential in anolyte solution
Estimating the amount of CO2 in the off-gas
Measurement of Ce3+/Ce4+ redox potential
- Pt-Ag/AgCl combined electrode
- pH/ORP meter(Orion, model 720A)
Measurement of degradation of Aniline
- CO2 analyzer(Environmental Instruments, Anagas CD 95)