Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Nitrogen or nitrogenous component
Patent
1998-09-24
1999-11-16
Langel, Wayne
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Nitrogen or nitrogenous component
423358, C01C 108, C01B 2100
Patent
active
059852240
ABSTRACT:
An improved process for combustion flue gas conditioning in which ammonia is injected into a stream of said combustion flue gas, wherein urea is dissolved in water, forming a dissolved urea solution. The dissolved urea solution is heated and pressurized and the dissolved urea therein hydrolyzed, forming ammonia and carbon dioxide. The ammonia and carbon dioxide are then stripped from the resulting hydrolysis solution and injected into the stream of combustion flue gas to be treated. Water from the stripped hydrolysis solution is then recycled for use in dissolving fresh urea.
REFERENCES:
patent: 4087513 (1978-05-01), Schell
patent: 5240688 (1993-08-01), von Harpe et al.
Langel Wayne
Medina-Sanabria Maribel
Siirtec-Nigi S.p.A.
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