Process for selective catalytic reduction of nitrogen oxides in oxygen-containing exhaust gases

摘要

Selective catalytic reduction of lean I.C. engine exhaust gas comprises producing a fatty gas stream with an air number of less than 1, forming ammonia in the fatty gas stream by reacting its components with each other, combining the lean exhaust gas with the fatty gas, and reducing the nitrogen oxides on a reducing catalyst using the ammonia formed as reductant.