Denitration catalyst for high-temperature exhaust gas

Details Denitration catalyst for high-temperature exhaust gas Denitration catalyst for high-temperature exhaust gas

1992-10-14

1993-12-21

Dees, Carl F.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Mixture is exhaust from internal-combustion engine

4232135, 4232392, B01D 5334

Patent

active

052719138

ABSTRACT:
A denitration catalyst for a high-temperature exhaust gas which is used to catalytically reduce and remove nitrogen oxides in the reaction temperature range of from 500.degree. to 700.degree. C. in the process of adding an ammonia gas to the exhaust gas containing the nitrogen oxides, the aforesaid catalyst being characterized by carrying 0.5 to 10% by weight of cerium in terms of Ce.sub.2 O.sub.3 or 0.5 to 5% by weight of iron in terms of Fe.sub.2 O.sub.3 on a high silica type zeolite in which the molar ratio of SiO.sub.2 /Al.sub.2 O.sub.3 is 20 or more.

REFERENCES:
patent: 4157375 (1979-06-01), Brown et al.
patent: 5149512 (1992-09-01), Li et al.

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