Title:
METHOD AND APPARATUS FOR ENHANCING THE SULFUR CAPTURE CAPABILITY OA AN ALKALINE EARTH MATERIAL
Document Type and Number:
WIPO Patent Application WO2001078874
Kind Code:
A8
Abstract:
The present invention provides, according to one aspect thereof, a method for reducing SO2 from a flue gas (40) and, according to a different aspect thereof, an apparatus (160) for reducing SO2 from a flue gas (40). The method includes the basic steps of providing an alkaline earth material (204) which has been treated by an aqueous treatment solution (202) consisting of an inorganic salt and heating the alkaline earth material (204) in the presence of the flue gas (40) containing SO2 to remove the SO2. The alkaline earth material (204) may be limestone or dolomite. The inorganic salt is selected from the group consisting of thermally decomposable sodium compounds including sodium carbonate, sodium bicarbonate, sodium hydroxide, sodium nitrate, and sodium acetate. In selected application of the method of the present invention, the inorganic sodium compound has a concentration of between 0.05 to 5 percent of the limestone or dolomite. In preferred applications of the method, the inorganic sodium compound has a concentration of between 0.05 to 1 percent of the limestone or dolomite.
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Inventors:
JOHNSON KURT W (US)
RUSZALA FERDINAND A
STROMBERG PETER T
RUSZALA FERDINAND A
STROMBERG PETER T
Application Number:
PCT/US2001/009138
Publication Date:
April 18, 2002
Filing Date:
March 22, 2001
Export Citation:
Assignee:
ALSTOM SWITZERLAND LTD (CH)
JOHNSON KURT W (US)
JOHNSON KURT W (US)
International Classes:
B01D53/50; F23J15/00; F23J15/04; (IPC1-7): B01D53/50; F23J15/00
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