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Mass transport control of oxygen reduction at graphite felt with subsequent decolourisation of RB-5 dye in a parallel plate flow reactor

Mass transport control of oxygen reduction at graphite felt with subsequent decolourisation of RB-5 dye in a parallel plate flow reactor
Mass transport control of oxygen reduction at graphite felt with subsequent decolourisation of RB-5 dye in a parallel plate flow reactor
3D Porous electrodes show excellent performance in industrial electrochemical engineering. Such electrodes perform better than planar electrodes in terms of their greater surface area, higher volumetric porosity, turbulence promotion of electrolyte and reasonable mass transfer rates. This paper considers the mass transfer studies of the oxygen reduction reaction (ORR) during the cathodic generation of H2O2 at carbon felt (CF) electrodes in a divided parallel plate electrochemical flow reactor. The volumetric mass transport coefficient obtained from voltammetric limiting current measurements increased at higher mean linear flow velocities in the rectangular channel of a parallel plate flow reactor. The cathodic compartment of the reactor has an equivalent diameter of 0.96 cm and it is separated from the anodic compartment by a cationic Nafion 115 membrane. A volumetric mass transfer coefficient (kmAe) of 0.74 s−1 was achieved at a mean linear flow velocity of 2.2 cm/s. Optimal conditions for H2O2 generation resulted in 95% Faradaic current efficiency and allowed up to 99% decolourisation of an organic RB-5 dye by electro Fenton oxidation.
Electrochemical engineering, Hydrogen peroxide, Mean linear electrolyte flow velocity, Volumetric mass transport coefficient, Electro Fenton;, RB-5 dye
123-129
Shaglwf, Zaid
b63f055d-ef24-4fe3-ae04-0e7b24f0f020
Walsh, Frank
309528e7-062e-439b-af40-9309bc91efb2
Harito, Christian
d146fa4e-fa33-40fc-b4b2-f4a77e0e75e6
Shaglwf, Zaid
b63f055d-ef24-4fe3-ae04-0e7b24f0f020
Walsh, Frank
309528e7-062e-439b-af40-9309bc91efb2
Harito, Christian
d146fa4e-fa33-40fc-b4b2-f4a77e0e75e6

Shaglwf, Zaid, Walsh, Frank and Harito, Christian (2019) Mass transport control of oxygen reduction at graphite felt with subsequent decolourisation of RB-5 dye in a parallel plate flow reactor. Journal of the Taiwan Institute of Chemical Engineers, 104, 123-129. (doi:10.1016/j.jtice.2019.08.020).

Record type: Article

Abstract

3D Porous electrodes show excellent performance in industrial electrochemical engineering. Such electrodes perform better than planar electrodes in terms of their greater surface area, higher volumetric porosity, turbulence promotion of electrolyte and reasonable mass transfer rates. This paper considers the mass transfer studies of the oxygen reduction reaction (ORR) during the cathodic generation of H2O2 at carbon felt (CF) electrodes in a divided parallel plate electrochemical flow reactor. The volumetric mass transport coefficient obtained from voltammetric limiting current measurements increased at higher mean linear flow velocities in the rectangular channel of a parallel plate flow reactor. The cathodic compartment of the reactor has an equivalent diameter of 0.96 cm and it is separated from the anodic compartment by a cationic Nafion 115 membrane. A volumetric mass transfer coefficient (kmAe) of 0.74 s−1 was achieved at a mean linear flow velocity of 2.2 cm/s. Optimal conditions for H2O2 generation resulted in 95% Faradaic current efficiency and allowed up to 99% decolourisation of an organic RB-5 dye by electro Fenton oxidation.

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More information

Accepted/In Press date: 24 August 2019
e-pub ahead of print date: 11 September 2019
Published date: November 2019
Keywords: Electrochemical engineering, Hydrogen peroxide, Mean linear electrolyte flow velocity, Volumetric mass transport coefficient, Electro Fenton;, RB-5 dye

Identifiers

Local EPrints ID: 437146
URI: http://eprints.soton.ac.uk/id/eprint/437146
PURE UUID: f35aaa8e-faf2-433b-b491-f64b28af16df

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Date deposited: 17 Jan 2020 17:36
Last modified: 06 Oct 2020 22:00

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