The use of fixed-structure sorbents for mercury capture from flue gas can offer several potential advantages over injection technologies related to sorbent utilization, combustion byproduct contamination, and particulate emissions. Sorbent polymer composite (SPC) materials have demonstrated effective performance with respect to mercury and multi-pollutant capture downstream of a wet scrubber in a number of flue gas slipstream and pilot scale tests. This paper summarizes recent results of both slipstream and pilot tests evaluating SPC material at two power plants firing bituminous coal and equipped with wet FGD systems. Parametric tests have evaluated the impact of sorbent configuration and gas velocity on mercury removal, SO_2 removal and pressure drop. Longer-term pilot tests evaluated pressure drop behavior, total particulate emissions, and SPC longevity. A preliminary engineering feasibility and economic analysis of a full-scale retrofit SPC installation will also be presented.
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