Electrochemical Oxidation of Propylene in a Sparged Packed-Bed Electrode Reactor

A special feature of this reaction is that the first order kinetics is not related to the propylene concentration fed by convection and gas-liquid mass transfer (a saturated propylene concentration assumed in electrolyte), but related to the OH ion concentration, because the OH ion pass through the membrane from the cathode side  

A non-linear mathematical model, which is a set of ordinary differential equations, for the process in the SPBER was developed.19 The model accounts for the heterogeneous electrochemical reaction and homogeneous reaction in the bulk solution. The lateral distributions of potential, current density and concentration in the reactor were studied. The potential distribution in the lateral dimension, x, of the packed bed was described by a one dimensional Poisson equation as  

This equation can be rewritten into the following form describing the distribution of overpotential  

The model was formulated on the basis of a set of material balances, for each of the species involved in the aqueous phase  

The first term in the equation represents the mass transport rate, 2 , is the total rate of chemical reaction, r,a is the rate of gas absorption given by 

Direct Electrochemical Oxidation of Propylene in a Sparged Packed-Bed Electrode Reactor  

The oxidation of alkenes has attracted interest over decades as a route for organic electro-synthesis. This has included attempts to cany out direct anodic oxidation to eliminate problems associated with the in situ use of electrochemically generated oxidants. A sparged packed bed electrode reactor (SPBER), with propylene oxidation separated from the generation of hydrogen was used 

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