Alkaline peroxide generation using a novel perforated bipole trickle-bed electrochemical reactor

Authors: Gupta, Neeraj; Oloman, Colin

Source: Journal of Applied Electrochemistry, Volume 36, Number 2, February 2006 , pp. 255-264(10)

Publisher: Springer

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Abstract:

A novel perforated bipole trickle-bed electrochemical reactor is investigated for the electro-synthesis of alkaline peroxide. The process uses a relatively simple cell configuration in which a single electrolyte flows with oxygen gas in a flow-by graphite felt cathode, sandwiched between a micro-porous diaphragm and a perforated bipolar electrode plate. The graphite felt cathodes are 120 mm high by 25 mm wide and have a thickness of 3.2 mm. The reactor is operated at current densities in the range 1–5 kA m⁻², ca. 800 kPa (abs) pressure and temperature (In/Out) 20–45 °C with one and two-cells. The reactor shows good performance (current efficiency ∼78% at 2 kA m⁻² and a specific energy of 5 kWh per kg of peroxide generated) with peroxide concentrations from 0.02 to 0.15 <Emphasis Type="SmallCaps">M</Emphasis> in 1 <Emphasis Type="SmallCaps">M</Emphasis> NaOH.

Keywords: electrochemical; electro-reduction; electro-synthesis; 3D electrodes; graphite felt; oxygen; perforated bipole; peroxide; trickle-bed

Document Type: Research article

DOI: http://dx.doi.org/10.1007/s10800-005-9066-y

Affiliations: 1: Email: neeraj.gupta@nrc-cnrc.gc.ca

Publication date: 2006-02-01