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Kinetics and Efficiency Analysis of Electrochemical Oxidation of Phenol: Influence of Anode Materials and Operational Conditions
Author(s) -
Cui Y. H.,
Feng Y. J.,
Li X. Y.
Publication year - 2011
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201000192
Subject(s) - anode , kinetics , electrochemistry , phenol , chemistry , chemical engineering , chemical kinetics , order of reaction , mineralization (soil science) , activation energy , inorganic chemistry , materials science , electrode , analytical chemistry (journal) , reaction rate constant , chromatography , organic chemistry , physics , quantum mechanics , engineering , nitrogen
The influence of operational parameters and anode materials on degradation kinetics, mineralization current efficiency, and energy consumption for electrochemical oxidation of phenol was studied. Phenol elimination follows pseudo‐first‐order kinetics in most cases except for the Ti/RuO 2 anode with a phenol concentration of 500 mg L –1 , where pseudo‐zero‐order kinetics is observed. The total organic carbon removal by a Ti/Sb‐SnO 2 anode follows pseudo‐first‐order kinetics in contrast to pseudo‐zero‐order kinetics by Pt and Ti/RuO 2 anodes. For a certain anode, a higher current or voltage input results in a higher reaction rate. With a Ti/Sb‐SnO 2 anode, the highest current efficiency and the lowest energy consumption are obtained, but the current efficiency decreases (increases for energy consumption) quickly as the reaction is prolonged due to the reduction of organics.