期刊
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
卷 84, 期 7, 页码 1084-1089出版社
WILEY
DOI: 10.1002/jctb.2199
关键词
electrochemical reactor; mass transport; woven wire mesh; rotating cylinder electrode; three-dimensional electrode
类别
资金
- Agencia Nacional cle Promocion Cientifica y Tecnologica (ANPCyT)
- Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET)
- Universiclad Nacional del Litoral (UNL)
BACKGROUND: The behaviour of a bipolar electrochemical reactor consisting of one or more rotating cylinder electrodes of woven wire meshes is reported using copper and cadmium deposition from dilute solutions as test reactions. RESULTS: The best performance related to electrode number was determined for copper deposition and was achieved by an arrangement with two bipolar electrodes, for which the conversion in a single pass was approximately 47%. The specific energy consumption was 3.27 kWh kg(-1) with a normalised space velocity of 23.05 h(-1). The copper powder obtained showed a nodular and dendritic surface morphology. This reactor configuration was also analysed for cadmium deposition, in which hydrogen evolution takes place simultaneously as a side cathodic reaction, considering the effect of flow rate and total current. The maximum conversion per pass for cadmium removal was 38.91%. In this case the reactor with two bipolar electrodes showed a performance similar to that of a monopolar reactor operated at a rotation speed three times higher. CONCLUSION: A continuous electrochemical reactor with two rotating bipolar electrodes of woven wire meshes presents a good performance for copper or cadmium removal from dilute solutions. (C) 2009 Society of Chemical Industry
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