We Energies and DOE, under a Clean Coal Power Initiative program (CCPI), are working together to design, install, evaluate and demonstrate the EPRI-patented TOXECON air pollution control process as an integrated emissions control system for mercury and particulate matter from three 90 MW units at the Presque Isle Power Plant located in Marquette, Michigan. CCPI was initiated in 2002 with a goal of accelerating commercial deployment of advanced technologies to ensure the United States has clean, reliable, and affordable electricity. CCPI builds upon the advancements made by previous and continuing clean coal research and ensures the ongoing development of advanced systems for commercial power production. This paper will discuss the first commercial full-scale TOXECON demonstration with activated carbon injection for mercury removal. The process involves the injection of activated carbon between the existing particulate collector (at Presque Isle, the existing collectors are hot-side electrostatic precipitators) and a fabric filter (baghouse) installed downstream. The sorbent collects mercury that is then removed from the flue gas using the baghouse. The project will also investigate the capabilities of the system to control SO_2 and NO_x emissions. Demonstration of TOXECON began in February 2006 and is scheduled to continue through early 2009. This paper will discuss balance of plant issues encountered during start-up in 2006 carbon injection testing. Mercury removal results from optimization and long-term testing will be presented as well as current efforts in SO_2 and NO_x trim control.
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