GORE™ Mercury Control System for Coal-Fired Utilities
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GORE Mercury Control System ™ A Simple and Effective Way to Comply With Regulatory Requirements Stricter Regulations, New Standards Coal-fired power plants in the U.S. are subject to increasingly strict emissions regulations. The Mercury and Air Toxics Standard (MATS) requires plants to achieve very low outlet emissions. There are a number of different mercury control solutions that can be utilized to achieve this standard. Since each power plant is different, the effectiveness of each solution is highly variable site-to-site. Some plants are faced with significant operating costs, or undesirable side-effects due to their selected mercury control approach. In an increasingly competitive power market, there is a need for a simple, cost-effective way to reduce mercury emissions. Gas flow typically 10-16 feet/second The GORE™ Mercury Control System (GMCS) is a unique fixed sorbent system for capturing elemental and oxidized gas phase mercury from industrial flue gas. The system is based on discrete stackable modules that are installed downstream of a particulate collection system. The modules are designed with a unique open channel structure which provides extremely low pressure drop, avoiding the need for an additional booster fan. Operation is passive; the modules will continuously capture mercury for many years without requiring any adjustment, regeneration, or replacement. They also provide an SO2 removal co-benefit. The system is completely scalable – modules can be stacked in the direction of the gas flow to achieve desired mercury removal efficiency. GMCS Modules can be stacked to achieve desired mercury removal Low Process Impact • No injection of sorbents: – No impact on fly ash properties – No impact on PM emissions – Significantly less solid waste vs. carbon injection • Captures elemental mercury without requiring the use of oxidizing chemicals – No corrosion of air preheater – No waste water treatment system complications • Re-emissions barrier: – No need for re-emissions additives – No gypsum contamination • Zero footprint in scrubber installations: – No gas conditioning needed – Extremely low pressure drop—no booster fan required Simple Operation • No moving parts • No chemicals to manage • Long module lifetime; very low operating cost Robust Compliance • Insensitive to coal changes or load changes • Not impacted by SO3 • SO2 polis

GORE Mercury Control System ™ The Science Behind the Solution At the heart of the technology is an innovative, fluoropolymerbased material developed by scientists at W. L. Gore & Associates: Sorbent Polymer Catalyst (SPC) composite material. The unique open channel structure of the GMCS module provides extremely low pressure drop. Pressure Drop per Module (inches H2O) The sorbent in this material efficiently captures both elemental and oxidized mercury from the flue gas stream. As such, it is insensitive to fuel or process changes that affect mercury speciation. Mercury is securely bound...

Installation in Wet Scrubber Installation of GMCS inside a wet scrubber results in no additional footprint requirements on-site, which is particularly important for sites with space constraints. A typical new installation inside of a wet scrubber can be completed during a 3–4 week outage. Module stacks are supported on beams and the modules fill the cross-sectional area of the scrubber above the mist eliminators. If there is insufficient vertical space in an existing scrubber design, the mist eliminators can be replaced with a compact design and installed in a lower position in the scrubber...

GORE Mercury Control System ™ GMCS Being Installed in Coal-Fired Power Plants The GMCS is an innovative solution that eliminates many of the undesirable complications and high operating costs associated with traditional mercury control systems. GMCS can be a viable alternative, replacement, or complement to an existing system, providing decreased operating costs, increased compliance margin, and simplified plant operation. Gore engineers are ready to evaluate installation options for specific plants, in order to determine approximate costs and projected cost savings that may be realized....