Solid Electrolyte Membrane Reactors For Selective Oxidation Reactions

Solid Electrolyte Membrane Reactors (SEMRs) have sparked more and moreinterest in recent years due to their promising application in heterogeneouscatalysis, especially in selective oxidation reactions.Oxidative dehydrogenation of propane was investigated in Bi4Cu0.2V1.8O11-δbased solid electrolyte membrane reactors in different operation modes. The rolesof different oxygen species were also discussed. It was believed that theBi₄Cu_0.2V_1.8O_11-δ based membrane reactors could be used for selective oxidationreactions at moderate temperatures.Direct hydroxylation of benzene to phenol by using in-situ generated activeoxygen species during the process of oxygen electrochemical reduction wascarried out in a H2-O2 proton exchange membrane fuel cell (PEMFC) reactor withNafion? as solid electrolyte membrane under usual PEMFC operation conditions.Phenol was only produced when the external circuit was closed. The formationrate of phenol could be controlled by adjusting the current or cell potential.The reaction behavior of ethanol steam reforming in an yttria stabilizedzirconia (YSZ) based solid electrolyte membrane reactor with Ag as electrodeswas initially studied. The transient change of reaction rates when applying currentwas recorded by MS. The results showed both ethanol oxidation and hydrogenoxidation occurred on the electrode surface simultaneously during circuitoperation.