EP0567964

EP0567964

A process for denitrating flue gas which comprises disposing a denitration catalyst bed using NH3 as a reducing agent in a region where the flue gas temperature ranges from 200 to 600 DEG C; injecting NH3 in an amount more than equimolar with nitrogen oxides in the flue gas at a point of the system...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: IIDA, KOUZO, KOBAYASHI, NORIHISA, MORII, ATSUSHI, KANEKO, SHOZO, SERIZAWA, SATORU, ONISHI, TOSHIYUKI, IMAMOTO, TOSHIHIKO, NAITO, OSAMU
Format: Patent
Sprache:eng
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 process for denitrating flue gas which comprises disposing a denitration catalyst bed using NH3 as a reducing agent in a region where the flue gas temperature ranges from 200 to 600 DEG C; injecting NH3 in an amount more than equimolar with nitrogen oxides in the flue gas at a point of the system upstream of the denitration catalyst bed and thereby removing NOx; and removing excess NH3 by adsorption at an NH3 adsorber which contains an NH3 adsorbent consisting of a metal oxide and having a specific surface area of at least 30 m /g in a region downstream of the denitration catalyst bed where the flue gas temperature is 200 DEG C or below.