Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/343577
Type: Artigo
Title: Use of gas diffusion electrode for the in situ generation of hydrogen peroxide in an electrochemical flow-by reactor
Author: Reis, Rafael M.
Beati, Andr e A. G. F.
Rocha, Robson S.
Assumpção, Mônica H. M. T.
Santos, Mauro C.
Bertazzoli, Rodnei
Lanza, Marcos R. V.
Abstract: Hydrogen peroxide is a powerful oxidant that finds application in several areas, but most particularly in the treatment of industrial wastewaters. The aim of the present study was to investigate the effects of applied potential and electrolyte flow conditions on the in situ generation of hydrogen peroxide in an electrochemical flow-by reactor with a gas diffusion electrode (GDE). The electrolyses were performed in an aqueous acidic medium using a GDE constructed with conductive black graphite and polytetrafluoroethylene (80:20 w/w). Under laminar flow conditions (flow rate = 50 L/h), hydrogen peroxide was formed in a maximum yield of 414 mg/L after 2 h at 2.25 V vs Pt //Ag/AgCl (global rate constant = 3.1 mg/(L min); energy consumption = 22.1 kWh/kg). Under turbulent flow (300 L/h), the maximum yield obtained was 294 mg/L after 2 h at 1.75 V vs Pt//Ag/AgCl (global rate constant = 2.5 mg/(L min); energy consumption = 30.1 kWh/kg)
Subject: Óxidos
Eletrodos
Oxigênio
Eletrólitos
Country: Estados Unidos
Editor: American Chemical Society
Rights: Fechado
Identifier DOI: 10.1021/ie201317u
Address: https://pubs.acs.org/doi/10.1021/ie201317u
Date Issue: 2012
Appears in Collections:FEM - Artigos e Outros Documentos

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