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Artículo

Electrochemical synthesis of hydrogen peroxide with a three-dimensional rotating cylinder electrode

Gonzalez Perez, OmarIcon ; Bisang, Jose MariaIcon
Fecha de publicación: 07/2013
Editorial: Wiley
Revista: Journal of Chemical Technology and Biotechnology
ISSN: 0268-2575
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ingeniería Química

Resumen

BACKGROUND: This work analyzes the synthesis of H2O2 from dilute NaOH solutions under 0.1 MPa O2 using a batch reactor with a three-dimensional rotating cylinder electrode. The centrifugal force produces a radial co-current flow of the gas and liquid phases. Thus, good mass transfer conditions are achieved and the O2 reduced to H2O2 is easily replenished in the liquid phase. RESULTS: Experiments with a glassy carbon rotating disc electrode identified 0.5 mol L-1 NaOH at 30°C as suitable operating conditions. Galvanostatic experiments with three-dimensional rotating electrodes concluded that the best performance was obtained for a reticulated vitreous carbon structure of 100 ppi, at 40 mA cm-2 of macrokinetic current density and 1000 rpm rotation speed. Long-term experiments showed 79% current efficiency and 8.2 kWh kg-1 specific energy consumption until 6 h of electrolysis, with 8.4 g L-1 H2O2 concentration. However, the current efficiency decreases for longer electrolysis times and consequently the specific energy consumption is increased. Thus after 10 h electrolysis the concentrations were H2O2 10.4 g L-1 and NaOH 1.41 mol L-1. CONCLUSION: A reactor having a three-dimensional rotating cylinder electrode with co-current oxygen and liquid flows inside the structure showed promising performance for H2O2 production.
Palabras clave: Hydrogen Peroxide , Electrochemical Reactor , Three-Dimensional Electrode , Oxygen Reduction
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/31432
URL: http://onlinelibrary.wiley.com/doi/10.1002/jctb.4149/abstract
DOI: http://dx.doi.org/10.1002/jctb.4149/abstract
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Articulos(CCT - SANTA FE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - SANTA FE
Citación
Bisang, Jose Maria; Gonzalez Perez, Omar; Electrochemical synthesis of hydrogen peroxide with a three-dimensional rotating cylinder electrode; Wiley; Journal of Chemical Technology and Biotechnology; 89; 4; 7-2013; 528-535
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