CATALYTICALLY ENHANCED COMPOSITIONS FOR EFFICIENT REMOVAL OF CONTAMINANTS IN FLUE GAS STREAMS

摘要

A sorbent composition that is useful for injection into a flue gas stream of a coal burning furnace to efficiently remove mercury from the flue gas stream. The sorbent composition may include a sorbent with an associated ancillary catalyst component that is a catalytic metal, a precursor to a catalytic metal, a catalytic metal compound or a precursor to a catalytic metal compound. Alternatively, a catalytic metal or metal compound, or their precursors, may be admixed with the coal feedstock prior to or during combustion in the furnace, or may be independently injected into a flue gas stream. A catalytic promoter may also be used to enhance the performance of the catalytic metal or metal compound.

主权项

1. A sorbent composition for the removal of contaminants from a flue gas stream, the sorbent composition comprising:
a powdered activated carbon sorbent, the sorbent having a mean particle diameter (D50) of not greater than about 25 μm, a surface area of at least about 350 m2/g and total pore volume of at least about 0.20 cc/g; and an ancillary catalyst component comprising at least one constituent selected from the group consisting of a catalytic metal, a precursor to a catalytic metal, a catalytic metal compound, and a precursor to a catalytic metal compound.