Performance studies on a bipolar fluidised bed electrode

Coupling between electroosmotically driven flow and bipolar faradaic depolarization processes in electron-conducting microchannels

“…A potential difference ϕ s is applied to the solution in the microchannel across its long side. For sufficiently large ϕ s , the channel exhibits bipolar electrodic behavior, as extensively commented in [17][18][19][20][21][22][23][24][25]29]. We consider here bipolar electrolysis in the case that two different redox couples, Fig.…”

“…Bipolar electrodes have been extensively studied for dispersions of conducting particles in socalled bipolar fluidized bed electrodes [17][18][19][20][21][22][23][24][25] and has recently been analyzed within the context of electrokinetics (streaming potential and streaming current) of metallic conductors in electroactive electrolytes [26][27][28]. Beyond a critical extent of polarization of such an electrode, i.e., in a sufficiently strong lateral electric field, the overpotentials become sufficiently high to induce noticeable electrolysis: the spatial variation of the metal solution potential provokes oxidation on one side of the substrate, coupled with reduction at the other [29].…”

Theoretical and experimental study of electrochemical reactors with three-dimensional bipolar electrodes

“…Goodridge et al [5,6] and Goodridge [7] studied the behaviour of conductive particles set in an electrical field. In [5], the particles are mechanically isolated between them, whereas in [6,7] the separation of the particles is achieved by fluidization.…”

“…In [5], the particles are mechanically isolated between them, whereas in [6,7] the separation of the particles is achieved by fluidization. These contributions give more attention to the specific energy consumption of the reactors and the theoretical values are compared with experimental ones obtained using the production of hypochlorite, hypobromite, epoxidation of styrene and synthesis of dimethyl sebacate as test reactions.…”

Modelling potentials, concentrations and current densities in porous electrodes for metal recovery from dilute aqueous effluents

“…Rousar [9], Bisang [10] and Scott [11] developed models for flow-by bipolar reactors with planar electrodes and Goodridge and King developed equations to estimate the minimum energy consumption for bipolar packed-bed electrodes [12] and fluidised bipolar bed electrodes [13]. The only report found of a (onedimensional) model of a reactor with a porous bipolar electrode [14], involved its operating under fully flooded conditions, with a single reversible reaction.…”