Flue Gas Sorbents, Methods For Their Manufacture, and Their Use in Removal of Mercury From Gaseous Streams

摘要

Disclosed are sorbents having superior water leachability performance characteristics especially when used as sorbents in semi-dry (CDS), high moisture (SDA), and fully wet SO2 scrubbers. Also disclosed are methods for the production of such performance-enhanced sorbents, and methods for the use of such sorbents in the removal of mercury and possibly one or more other heavy metals or other contaminants from various gaseous streams. The sorbents are carbonaceous substrates treated with a bromine-containing compound, especially gaseous bromine, and with at least one organic compound that contains at least one olefinic double bond.

主权项

1. A method for increasing the resistance of a brominated carbonaceous sorbent to water leaching of bromine species, which method comprises contacting a carbonaceous substrate with at least one organic compound that contains at least one olefinic double bond in an amount sufficient to increase the resistance of the brominated sorbent to water leaching of bromine species, wherein bromination of the carbonaceous substrate is conducted prior to, during, and/or after said treatment with the organic compound.