Patent ID: 8404038
Filing Date: 2013-03-26
Classification: B01D,B01J,C04B,F23J,Y02C,Y02W

Abstract:
1. A method comprising: providing a carbonaceous mercury sorbent precursor consisting of wood, lignite, coconut shell, and combinations thereof; activating or reactivating the mercury sorbent precursor by a method selected from the group consisting of activating with steam, activating with CO grinding the activated carbonaceous mercury sorbent with no post-treatment after activation or reactivation to an average particle size less than about 325 mesh; injecting the activated carbonaceous mercury sorbent with no post-treatment into a gas stream containing mercury, mercury-containing compounds, or a combination thereof, and fly ash, cement kiln dust, or a combination of fly ash and cement kiln dust, and allowing the activated carbonaceous mercury sorbent with no post-treatment to contact the mercury or mercury-containing compounds to create mercury sorbent with adsorbed mercury; and removing the mercury sorbent with adsorbed mercury along with fly ash, cement kiln dust, or both, from the gas stream in a particulate control device, such that the mercury sorbent with adsorbed mercury along with fly ash, cement kiln dust, or both, is suitable for combining with an air-entraining admixture to provide a cementitious or pozzolanic composition.