Two-Dimensional Modelling of a Non-Isothermal PrOx Reactor with Water Cooling for Fuel Cell ApplicationsH. Beyer, B. Schönbrod, C. Siegel, M. Steffen, and A. Heinzel
Zentrum für BrennstoffzellenTechnik GmbH, Duisburg, Germany
Institut für Energie und Umweltverfahrenstechnik, University of Duisburg-Essen, Duisburg, Germany
This work treats of a preferential oxidation reactor, which is simulated by a two-dimensional axial symmetric model. The reactor serves as purification of hydrocarbon reformat and converts the CO mole fraction from up to 1 % in the feed gas down to a few ppm at the outlet to deliver a hydrogen rich feed gas for a PEM fuel cell. The model combined chemical kinetic expressions, which were determined within kinetic experiments with mass, energy and momentum transport equations. In a first step the O/CO-ratio was increased successively while the inlet temperature T0 was held constant. Subsequently the inlet temperature was varied whereas the O/CO-ratio stayed constant. Cross section plots in axial direction are presented and show the reactor performance.