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Mass transfer behaviour of a fixed bed electrochemical reactor with a gas evolving upstream counter electrode
Author(s) -
Sedahmed G. H.
Publication year - 1996
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450740408
Subject(s) - cathode , mass transfer , ferricyanide , limiting current , anode , electrochemistry , electrode , analytical chemistry (journal) , mass transfer coefficient , packed bed , volumetric flow rate , chemistry , oxygen , materials science , inorganic chemistry , thermodynamics , chromatography , physics , organic chemistry
Mass transfer rates were determined at a horizontal screen cathode stirred by oxygen bubbles evolved at a horizontal anode placed below the screen by measuring the limiting current of the cathodic reduction of ferricyanide ion from alkaline solution. Variables studied were oxygen discharge rate, ferricyanide concentration and number of closely packed screens forming the cathode. For a single screen cathode the data were correlated by the equation: J = 0.249 ( Re Fr ) ‐0.25 The mass transfer coefficient was found to decrease with increasing the number of screens forming the cathode. Implications of the present work for improving the performance of the flow‐through packed bed electrochemical reactor were highlighted.