Exhaust gas cleaning system having internal ammonia...

Details Exhaust gas cleaning system having internal ammonia... Exhaust gas cleaning system having internal ammonia...

2005-03-29

2005-03-29

Elve, M. Alexandra (Department: 1725)

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Waste gas purifier

C422S168000, C422S173000

Reexamination Certificate

active

06872365

ABSTRACT:
An exhaust-gas cleaning system for cleaning exhaust gas from a combustion source so as to remove at least nitrogen oxides contained therein is provided. An ammonia-generation catalytic converter for generating ammonia uses constituents of at least some of the exhaust gas emitted from the combustion source during ammonia-generation operating phases. A downstream nitrogen oxide reduction catalytic converter is provided for reducing nitrogen oxides which are contained in the exhaust gas emitted from the combustion source using the ammonia generated as the reducing agent. According to the invention, a plasma generator for using plasma technology to generate reactive particles, which promote the ammonia-generation reaction, from constituents of the exhaust gas fed to the ammonia-generation catalytic converter during the ammonia-generation operating phases is connected upstream of the ammonia-generation catalytic converter. This ensures that sufficient ammonia is generated even at relatively low exhaust-gas temperatures.

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patent: 195 10 804 (1996-09-01), None
patent: 0 802 315 (1997-10-01), None
patent: WO 9717532 (1997-05-01), None

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