DENITRATION METHOD - BABCOCK HITACHI KK

Title:

DENITRATION METHOD

Document Type and Number:

Japanese Patent JP2013052371

Kind Code:

A

Abstract:

To provide a denitration method operative at a temperature equal to or lower than the precipitation temperature of acid ammonium sulfate determined by an equilibrium constant.

The denitration method includes blowing, as a reducing agent, ammonia (NH₃) or urea which is a precursor of NH₃ into exhaust gas that contains sulfur trioxide (SO₃), and then bringing the exhaust gas into contact with a catalyst to reduce and eliminate a nitrogen oxide (NOx) contained in the exhaust gas. The catalyst in use comprises an oxide of titanium (Ti), at least one of molybdenum (Mo) and tungsten (W), vanadium (V), and phosphorus (P), and a denitration reaction is performed at the temperature equal to or lower than the precipitation temperature of acid ammonium sulfate determined by the product of the respective concentration of NH₃, SO₃ and water (H₂O).

Inventors:

KATO YASUYOSHI
IMADA NAOMI
KAI KEIICHIRO
IKEMOTO KIYOSHI
MATSUYAMA KOTOE

Application Number:

JP2011193588A

Publication Date:

March 21, 2013

Filing Date:

September 06, 2011

Export Citation:

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Assignee:

BABCOCK HITACHI KK

International Classes:

B01D53/94; B01J27/199

Domestic Patent References:

JP2002292245A	2002-10-08
JPH01176453A	1989-07-12
JPH11300213A	1999-11-02
JPH11300213A	1999-11-02
JP2002292245A	2002-10-08
JPH01176453A	1989-07-12

Foreign References:

US4719192A	1988-01-12
US4719192A	1988-01-12

Attorney, Agent or Firm:

Hirotsugu Yoshioka

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