Nitrogen oxides treatment process for diesel engine of vehicle, involves treating nitrogen oxides destocked by selective catalytic reduction by injecting reducing agent constituted of compound generating ammonia by decomposition

摘要

The process involves thermally destocking nitrogen oxides at a temperature of exhaust gas comprising a non-reducing composition higher than 300 degree Celsius, collected by a nitrogen oxide trap (14). The nitrogen oxides destocked by a selective catalytic reduction (16) is treated by injecting a reducing agent constituted of compound generating ammonia by decomposition. An exhaust line (12) is provided with the trap.