Methods of denitrating exhaust gases

Details Methods of denitrating exhaust gases Methods of denitrating exhaust gases

B - Operations, Transporting

01

D

B01D 53/56 (2006.01) B01D 53/86 (2006.01) B01J 29/04 (2006.01) B01J 29/06 (2006.01)

Patent

CA 2154500

A method of denitrating an exhaust gas by means of removing nitrogen oxides catalytically using ammonia as a reducing agent while introducing an exhaust gas containing the nitrogen oxides into a reaction vessel packed with a catalyst, comprising: providing a denitration catalyst layer in the upstream of the gas flow, an ammonia decomposition catalyst layer capable of decomposing oxidatively ammonia into nitrogen and nitrogen oxides in the downstream and a second denitration catalyst layer or a denitration catalyst layer capable of decomposing ammonia in the further downstream; and, adding ammonia in an amount not less than the reaction equivalence for the nitrogen oxides in the exhaust gas to the inlet of the first denitration catalyst layer.

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