Patent ID: 8420561
Filing Date: 2013-04-16
Classification: B01D,B01J

Abstract:
1. A method of collecting mercury from a flue gas comprising: injecting a mercury sorbent material into a flue duct carrying the flue gas to provide an injection concentration, the mercury sorbent material made by exothermically shearing a smectite clay containing an exchangeable cation with a copper salt and a sulfur source; and providing an enthalpically driven ion pairing of the clay exchangeable cation with the copper salt; and wherein the mercury sorbent material is substantially free of a diffraction peak at 2.73±0.01 Å; reacting the mercury sorbent material with mercury in the flue gas to form a mercury-sorbed material and thereby reducing the concentration of mercury in the flue gas; injecting lime into the flue duct at a location such that the mercury sorbent material and the lime mix in the flue duct; reacting the lime with SO collecting a byproduct mixture that comprises the mercury-sorbed material, and any unreacted mercury sorbent material.