Filtration media for the removal of mercury from flue gas emissions
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United States of America Patent
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Dec 8, 2009
Grant Date -
Apr 23, 2009
app pub date -
Oct 17, 2007
filing date -
Oct 17, 2007
priority date (Note) -
Expired
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Abstract
Filtration materials comprising heat-treated metal-doped precipitated silica or silica gel materials with sulfur-containing functional silane surface treatments are provided. Such materials exhibit excellent mercury removal properties from flue gas emissions through the trapping of mercury vapors within a smokestack (or other like site). The metal dopant and the sulfur-containing functional silane components applied to the surface of the target metal-doped gels effectuate the desired mercury reactions to permit capture thereof. In combination, such components permit versatile utilization in either a fixed bed configuration or through a dynamic mercury removal procedure. Methods of using and specific filter apparatuses are also encompassed within this invention.
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