The increasing awareness of the greenhouse effect has in many countries lead to more stringent legislation resulting in a growing demand for equipment with lower emissions of carbon dioxide (CO2). The fact that biofuels are CO2 neutral, the same amount of CO2 is bound during the growth of the fuel as will be emitted in the combustion, makes biofuels an attractive alternative for a sustainable society. However, the emissions from small-scale combustion of biofuels tend to locally be as well an environmental as a health problem. Therefor the use of oxidation catalysts is an attractive alternative for this kind of combustion equipment. Due to the fact that the experimental investigation of temperature and concentration profiles inside the narrow catalyst channels is impossible, the mathematical model CatSim has been developed at the institute for apparatus design, particle and combustion technology. CatSim is a multi-dimensional heterogeneous model for the simulation of one single catalyst channel. In a heterogeneous model the gas-phase, the washcoat and the wall are spatially discretized. A comparison of CatSim-calculations and experimental results shows that the transient behavior of monolithic catalysts used in off-gas treatment applications can be predicted correctly. There is good agreement in both, the mass transfer limited region and the chemically controlled region.
|Effective start/end date||1/01/96 → 31/12/98|