A small-scale pilot plant using an oxygen-reducing gas-diffusion electrode for hydrogen peroxide electrosynthesis

被引：56
|
作者：
Giomo, M. [1 ]
Buso, A. [1 ]
Fier, P. [1 ]
Sandona, G. [2 ]
Boye, B. [3 ]
Farnia, G. [2 ]
机构：
[1] Univ Padua, Dipartimento Principi & Impianti Ingn Chim I Sorg, I-35131 Padua, Italy
[2] Univ Padua, Dipartimento Sci Chim, I-35131 Padua, Italy
[3] Ind Depurat & R DT i, Cyclus ID, Seville 41530, Spain
来源：
ELECTROCHIMICA ACTA | 2008年 / 54卷 / 02期
关键词：
Gas diffusion electrode; Oxygen reduction; Hydrogen peroxide production; Flow electrochemical reactor; Mathematical modelling;
D O I：
10.1016/j.electacta.2008.06.038
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
A pilot plant for electro-generation of hydrogen peroxide using an oxygen-reducing gas-diffusion electrode (GDE) was built and a mathematical model was developed to simulate the overall system. The electrode was made of a web coated with layers of VULCAN XC-72 Carbon catalyst on both sides of the assembly and a coating of SAB (Shawinigan Acetylene Black) on the gas-side. Electrolyses were carried out in galvanostatic mode. using catholyte consisting of 0.07 M NaCl solution, pH 2.7 and adopting a batch recycle mode of operation. Mathematical analysis was based on a three-phase model, and simulated the evolution of hydrogen peroxide concentration profiles in liquid-filled pores. Various models were developed to represent the behaviour of the cathode compartment in the electrochemical cell. The result is a tool which shows how hydrodynamics affect the performance of the overall system. Hydrogen peroxide production achieved during electrolysis can be calculated by means of this tool. Comparison of numerical simulations against experimental data validated the model developed in this study. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：808 / 815
页数：8
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