Patent ID: 7361209

Claim:
A method for treating a contaminated gas stream, the gas stream comprising one or more contaminants, comprising: transporting a particulate unmilled sorbent material and coal from a remote location to a utility plant site; combusting coal to produce a contaminated gas stream; milling the unmilled particulate sorbent material to produce a plurality of milled sorbent particles, the unmilled particulate sorbent material having a first size distribution and the milled sorbent particles having a second size distribution, wherein the second size distribution is smaller than the first size distribution, wherein the second size distribution has a P 90 size ranging from about 0.5 to about 25 microns, and wherein the comminuting step occurs on-site with the plant in which the coal is combusted; and thereafter introducing the comminuted sorbent particles into the gas stream to remove the one or more contaminants.