Coal-fired power plants are a significant contributor to the anthropogenic emission of mercury. Increasing regulations regarding the reduction of mercury emissions necessitates the injection of materials into the flue gas stream to adsorb mercury. Powder activated carbon (PAC) is the most effective adsorbent in the market; however, the use of PAC's is on the order of $10 million dollars per year for a 1000MW power plant, with costs expected to rise exponentially. Therefore, the development of effective and less expensive adsorbent materials is of paramount importance. This investigation examined modifying fly ash with ammonium bromide using 3 separate methods. This developed material was subsequently evaluated for effectiveness in adsorbing mercury. Results show that the mechanochemical application method is both most economical and practical for production and most effective for the adsorption of mercury.
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