Preferential oxidation of CO over Au/CuOx–CeO2 catalyst in microstructured reactors studied through CFD simulations

摘要: Abstract A computational fluid dynamics (CFD) simulation study of the preferential oxidation CO (CO-PROX) in microstructured reactors consisting square and semicircular microchannels coated with an Au/CuOx–CeO2 catalyst is presented. The content feed stream was set at 1 vol.%. parametric sensitivity analysis has been performed under isothermal conditions revealing that optimal reaction temperature exists leads to a minimum microreactor exit. influence space velocity, CO2 concentration oxygen-to-CO molar ratio (λ), loading, microchannel characteristic dimension (d) on performance investigated. Under suitable conditions, can be reduced below 10 ppm relatively low temperatures within 155–175 °C range. negative effect increase d from 0.35 mm 2.8 mm removal efficiency found attributed more detrimental mass transport limitations than H2. Non-isothermal CFD simulations have investigate cooling CO-PROX reactor air or fuel cell anode off gas surrogate parallel microchannels. Due very rapid heat transfer allowed by strong exit concentration, careful control coolant flow rate inlet required for proper operation. behavior virtually isothermal.