Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Sulfur or sulfur containing component
Patent
1988-09-28
1989-09-12
Heller, Gregory A.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Sulfur or sulfur containing component
B01J 800, C01B 1700
Patent
active
048658286
ABSTRACT:
A method for removing acid gases, particularly the sulfur oxides and hydrochloric acid from a hot flue gas without substantially cooling or humidifying the latter consists in withdrawing a small stream of the flue gas, preferably the purified gas, and introducing it into a stream of humid gas consisting of steam and/or humid air containing dispersed therein a finely-divided, porous, alkaline earth metal hydroxide upon which surface is adsorbed at least a monomolecular layer of water, and thereby reacting carbon dioxide in the withdrawn portion of the flue gas with the pore surfaces of the hydroxide to form an alkaline earth metal carbonate thereon. The so-formed reactant in the humid gas is then brought into contact with the main flow of hot flue gas, thereby removing acid gases from the flue gas, the solid reaction products and excess reactant thereafter being separated from the flue gas in a baghouse or electrostatic precipitator, and the so-treated flue gas being discharged to the atmosphere.
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Heller Gregory A.
Williams Olin E.
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