(691c) Study of a Method of Removing Mercury From Coal Power Plant Flue Gases and Its Effects On NOx and SOx Emissions

This paper will present the results of ongoing study of a method of mercury removal from flue gas of coal-fired power plants. The state-of-the-art of flue gas mercury removal and different methods of removing mercury including calcium chloride injection, activated carbon injection, bromine gas, and photochemical oxidation will be discussed. At the University of Wyoming, we have conducted extensive study of data of Calcium Chloride injection, Pulverized Activated Coal (PAC) injection and Hybrid injection (of combination of Calcium Chloride and PAC) methods for removing mercury from flue gas of Powder River Basin coal. Process mechanism and technology have been studied. Data were collected and analyzed on mercury removal efficiency. Also, to study the multi-component emission effects of the mercury removal technology, data on emissions of sulfur oxide and nitrogen oxide were collected before and after the implementation of mercury removal method. The collected data from the field test study are being analyzed for making conclusions on mercury removal efficiency and other performance parameters (including effects on multi-component emissions). Details of the study including these conclusions will be discussed.