Gas separation: processes – Solid sorption – Inorganic gas or liquid particle sorbed
Patent
1998-10-07
2000-02-22
Spitzer, Robert
Gas separation: processes
Solid sorption
Inorganic gas or liquid particle sorbed
95 58, 95285, B01D 5304, B01D 5364
Patent
active
060275510
ABSTRACT:
Mercury emission from a flue gas such as that generated by a coal fired power plant is controlled by injecting into the flue gas unburned carbon purified from ash such as fly ash or wood ash. The unburned carbon adsorbs the mercury and is later removed from the flue gas by a particle separator. The unburned carbon collected from ash is significantly lower in cost compared to activated carbon presently used in such a process. The unburned carbon is concentrated in the sorbent by one or more separation processes used to remove non-carbon particles from the fly ash. These processes include gravity separation, electrostatic separation, froth flotation, magnetic separation and size classification. Mercury adsorption is further increased by oxidation of the carbon surface.
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Hwang Jiann-Yang
Li Zhenglong
Board of Control for Michigan Technological University
Spitzer Robert
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