Title:
REGENERATION METHOD FOR DENITRATION CATALYST
Document Type and Number:
Japanese Patent JP2005087902
Kind Code:
A
Abstract:
To provide a method for simply and effectively regenerating a catalyst poisoned by the accumulation of sulfur oxide and a sulfate in the catalyst.
In this regeneration method for the denitration catalyst used in exhaust gas, in which sulfur oxide coexists, of a waste refuse incinerator, or the like, at a relatively low temperature of 150-300°C to catalytically reduce nitrogen oxide using an ammonia reducing agent, the denitration catalyst is washed with an aqueous solution containing ammonia radicals, vanadium and/or tungsten. By this washing, the sulfur oxide and the sulfate mainly accumulated in the catalyst are eluted and removed before the washed catalyst is baked.
Inventors:
FUKUJU ATSUSHI
ARAKI SADAO
ICHIKI MASAYOSHI
YANO KAZUHIRO
ARAKI SADAO
ICHIKI MASAYOSHI
YANO KAZUHIRO
Application Number:
JP2003325678A
Publication Date:
April 07, 2005
Filing Date:
September 18, 2003
Export Citation:
Assignee:
HITACHI SHIPBUILDING ENG CO
International Classes:
B01D53/94; B01D53/96; B01J23/22; B01J23/92; B01J38/48; (IPC1-7): B01J23/22; B01D53/94; B01D53/96; B01J23/92; B01J38/48
Attorney, Agent or Firm:
Norihiko Hibi
Einosuke Kishimoto
Akira Watanabe
Kiyosue Yasuko
Einosuke Kishimoto
Akira Watanabe
Kiyosue Yasuko
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