SBIR-STTR Award

Fossil Energy Research Corporation proposes the development of a novel duct injection process for simultaneous removal of S02' and NOx ' from coal-furd power plant flue gases. In this process, a mixture of lime and a proprietary sorbent is injected either dry or in the form of a slurry into the flue gas duct between the air preheated and particulate collection device. Lime removes S02 and the proprietary sorbent removes NOx from the flue gas. The NOx separated from the flue gas is fed back to the boiler where it is reduced to N2and @0. The unused lime and most of the NO. sorbent are recovered and recycled. The waste product of dw process is a solid residue which contains fly ash and sulfates of calcium. A rough cost estimate showed that the proposed duct injection process has a potential cost advantage of 60% - 70% when compared to other combined S02 and NO. removal processes.