Title:
【発明の名称】窒素酸化物の除去方法および該方法に用いる触媒
Document Type and Number:
Japanese Patent JP2653799
Kind Code:
B2
Abstract:
A process for removing nitrogen oxides from exhaust gases containing volatile metal compounds with good efficiency by contacting the gases with a catalyst comprising TiO2, difficultly reduced by the compounds, in the presence of ammonia, and such a catalyst are provided, which process is characterized in that the average pore diameter of the TiO2 is 10,000 ANGSTROM or less and the proportion of the volume of pores having pore diameters of 400 - 5,000 ANGSTROM to the total pore volume is 50% or more; a denitration-active component is supported on the TiO2; a catalyst carrier precursor comprising an aqueous slurry sol of TiO2 or Ti hydroxide prepared by hydrolyzing a Ti salt is precalcined at 150 DEG - 700 DEG C, followed by adding a denitration-active component and then normally calcining the mixture; and a polymer compound having a thermal decomposition temperature of 110 DEG to 300 DEG C is added in 1 - 20% by weight to the catalyst carrier precursor, followed by precalcining the mixture at the thermal decomposition temperature or higher.
More Like This:
Inventors:
TATE TAKAHIRO
KATO AKIRA
KAWAGOE HIROSHI
YAMASHITA HISAO
KAMO JUICHI
MATSUDA SHINPEI
KATO YASUYOSHI
NAKAJIMA FUMITO
KATO AKIRA
KAWAGOE HIROSHI
YAMASHITA HISAO
KAMO JUICHI
MATSUDA SHINPEI
KATO YASUYOSHI
NAKAJIMA FUMITO
Application Number:
JP28910087A
Publication Date:
September 17, 1997
Filing Date:
November 16, 1987
Export Citation:
Assignee:
BABUKOTSUKU HITACHI KK
International Classes:
B01D53/94; B01D53/86; B01J21/06; B01J23/28; B01J35/10; (IPC1-7): B01D53/94; B01D53/86; B01J23/28
Domestic Patent References:
| JP56108517A | ||||
| JP62204830A | ||||
| JP62227427A | ||||
| JP5098487A |
Attorney, Agent or Firm:
Kawakita Takecho