Controlling Pollutant Emissions through the Supplemental Use of Natural Gas: Phase 1 - Bench Scale Screening Studies. Phase 2 - Flow Field Evaluation and Mixing

摘要

Natural gas can be used to enhance the economic acceptability of eastern coals for power generation under more stringent environmental regulations. The application of technologies which take advantage of the clean burning qualities of natural gas offers an attractive and cost effective option for acid rain precursor control. The report discusses the technical advantages of natural gas over coal and oil as a reburning fuel in conjunction with sorbent injection for combined NOx and SOx control. Experimental results indicate that 60 percent NOx reduction and 70 percent SO2 reduction can be achieved when 20 percent natural gas reburning is combined with hydrate injection under realistic time/temperature furnace profiles. In addition, the report describes the mixing studies on cold flow models of practical applications and discusses the general design guidelines for the reburning fuel and burnout air injection systems.