Increasing Carbon Content of Fly Ash: Consequences and Recovery of Lost Value

摘要

In response to Phase II of the Clean Air Act of 1990, U.S. electric utilities operating coal fired power plants are currently installing low NO_x equipment to meet new air emissions requirements. As these plants begin to operate under the lower NO_x requirements, more carbon remains in the plant's fly ash (a by-product of coal combustion) often exceeding the maximum allowable carbon content of 6percent for use in concrete.