Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Nitrogen or nitrogenous component
Patent
1996-04-02
1996-12-31
Lewis, Michael
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Nitrogen or nitrogenous component
4232391, 4232392, C01C 300
Patent
active
055891462
ABSTRACT:
A method for treating ammonia in an exhaust gas on the downstream side of a dry denitration device using ammonia as a reducing agent comprises the step of alternately carrying out ammonia adsorption and ammonia desorption/decomposition to continuously treat ammonia in the exhaust gas in a plurality of constitutional units parallelly connected on an exhaust gas line, the aforesaid constitutional units being constituted so as to carry out the steps of adsorbing/removing ammonia in an ammonia adsorbent-filling tower disposed at a position, where an exhaust gas temperature is 200.degree. C. or less, on the downstream side of the dry denitration device; heating, up to a temperature of 300.degree. C. or more, the ammonia adsorbent-filling tower on which ammonia is adsorbed in a saturated state, to desorb ammonia; and decomposing ammonia in an ammonia decomposition catalyst-filling tower disposed on a desorption ammonia gas line.
REFERENCES:
patent: 4169814 (1979-10-01), Inaba et al.
Translation of EP 0,261,610 Mar. 30, 1980.
Database WPI & JP-A-53 125 962 Feb. 11, 1978.
Database WPI & JP-A-53 077 872 Oct. 7, 1978.
Database WPI & JP-A-50 026 797 Mar. 19, 1975.
Patent Abstracts Of Japan vol. 007, No. 039 & JP-A-57 190 640 Nov. 24, 1982.
Patent Abstracts Of Japan vol. 004, No. 050 & JP-A-55 023 069 Feb. 19, 1980 .
Iida Kouzo
Morii Atsushi
Naito Osamu
Nakamura Hitoshi
Onishi Toshiyuki
Dunn Jr. Thomas G.
Lewis Michael
Mitsubishi Jukogyo Kaisha
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