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R&D 100 AWARD .... Mercury Removal/Recovery Process has been accorded the prestigious R&D 100 Award and named by R&D Magazine as one of the most technologically significant new products in 1994.

THREE RIVERS ENVIRONMENTAL AWARD .... MRS has been honored in its own community through the Three Rivers Environmental Award which was presented to MRS for "commitment to environmental excellence, leadership, and accomplishment".

MOST NOVEL TECHNOLOGY AWARD .... 1994 Pittsburgh Growth Capital Conference

"TOP 25 EMERGING ENVIRONMENTAL TECHNOLOGIES" .... MRS was one of five companies selected for a special write-up in a Forbes Magazine supplement highlighting the "25 top new environmental technology companies to watch".



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The use of Activated Carbon Injection (ACI) for the removal of mercury from flue gas is a well established method that has been commercially implemented and  requires the injection of Powdered Activated Carbon (PAC) into the flue gas stream.  While this method successfully removes the mercury from the flue gas, it has inherent flaws.  PAC is a costly reagent ($1.00/lb) that is consumed and ultimately landfilled, and the captured mercury is merely transferred from the air to the ground, not eliminated from the environment.

PMET developed the MERCS (Mercury Emissions ReCovery & Sequestration) process that enables the regeneration and reuse of PAC after it has captured the mercury.  This process is most effective when the ACI occurs after a fabric filter or electrostatic precipitator (ESP) and prior to a PAC collection device, such as a fabric filter.  Once collected, the PAC is thermally treated in an inert atmosphere to desorb the contained mercury allowing the PAC to be returned to the injection system for reuse. The desorbed mercury is sequestered and condensed into a salable metal, thus avoiding any disposal of potentially toxic waste streams.  This step eliminates the environmental liability associated with the mercury for the generating entity.


Compared to single-pass PAC that is injected once, collected and disposed of; MERCS offers significant operating cost savings, reduced PAC consumption to stretch the existing supply, and mercury emissions that are sequestered.

PMET successfully demonstrated the ability to desorb mercury from PAC using a synthetically loaded carbon from Norit (DARCO FGD).  After the mercury was desorbed, the regenerated PAC was found to have the same characteristics as virgin material.  Using this test data, and the published data from US DOE, the MERCS process is capable of reducing the ACI operating costs by a factor of ten(10).  These savings will allow high cost facilities with mercury emissions to comply with the upcoming regulations without a cap and trade system.

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