Patent ID: 8609046

Claim:
A process of treating a gas stream containing mercury, comprising applying a sorbent composition into said gas stream ahead of a particulate matter collection device, in order to adsorb at least a portion of a mercury containing compound, wherein said sorbent composition comprises a compound having formula (I), (SiO 2 ) x (OH) y M z S a F.B (I) wherein M is a metal or metalloid cation selected from the group consisting of: boron, magnesium, aluminum, calcium, titanium, vanadium, manganese, iron, cobalt, nickel, copper, zinc, zirconium, molybdenum, palladium, silver, cadmium, tin, platinum, gold, and bismuth; S is a sulfur-based species selected from the group consisting of: sulfide salts, dithiocarbamates, polymer-based dithiocarbamates, and polysulfide salts; F optionally exists and when present is selected from the group consisting of: a functionalized organosilane, a sulfur-containing organosilane, an amine-containing organosilane, and an alkyl-containing organosilane at a surface area coverage of about 0.01 to about 100%; B is a hygroscopic solid at a preferred water solid molar ratio of about 0.1 to about 6; the molar ratio of y/x is equal to about 0.01 to about 0.5; the molar ratio of x/z is equal to about 0.5 to about 300; and the molar ratio of a/z is about 0.5 to about 5.