METHOD AND EXHAUST SYSTEM FOR TREATING NOX IN EXHAUST GAS FROM STATIONARY EMISSION SOURCES

METHOD AND EXHAUST SYSTEM FOR TREATING NOX IN EXHAUST GAS FROM STATIONARY EMISSION SOURCES

A method of selectively catalysing the reduction of oxides of nitrogen (NOx) including nitrogen monoxide in an exhaust gas of a stationary source of NOx emissions also containing oxides of sulfur (SOx) comprising the steps of passively oxidising nitrogen monoxide to nitrogen dioxide (NO2) over an ox...

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Bibliographische Detailangaben
Hauptverfasser: DOURA, Kevin, ANDERSEN, Paul Joseph
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
THEIR RELEVANT APPARATUS
TRANSPORTING
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Beschreibung
Zusammenfassung:A method of selectively catalysing the reduction of oxides of nitrogen (NOx) including nitrogen monoxide in an exhaust gas of a stationary source of NOx emissions also containing oxides of sulfur (SOx) comprising the steps of passively oxidising nitrogen monoxide to nitrogen dioxide (NO2) over an oxidation catalyst comprising a platinum group metal so that a NO2/NOx content is from 40-60%; introducing a nitrogenous reductant into the exhaust gas; and contacting exhaust gas having the 40-60% NO2/NOx content and containing the nitrogenous reductant with a selective catalytic reduction (SCR) catalyst comprising an aluminosilicate zeolite promoted with copper.