Modeling of a fixed bed reactor and kinetic investigations for the catalytic reduction of nitrogen oxides with methane

For the catalytic reduction of nitrogen oxides with methane in oxygen rich exhaust gases zeolite catalysts are used. During a catalyst screening the b eta-zeolite (BEA) which was modified with Indium has been chosen for kineti c measurements in a fixed bed reactor. Therefore zeolite pellets were prepa red. The influence of the residence time, temperature and gas composition a t the inlet of the reactor were investigated by experiments and simulations , An isothermic process model was developed which is based on a balance sch eme.