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Amended Silicates Life Cycle Assessment

Mercury emissions from coal-fired power plants are regulated by the United States Environmental Protection Agency Mercury and Air Toxics Standards....


EES Amended Silicates prides itself on providing products and services that reduce the environmental impacts of coal burning power plants and boilers. For the present and near future, it is clear that coal will continue to be a key fuel in the generation of electricity for our cities and towns, and for numerous industries throughout the country. EES Amended Silicates' products and services are, and will be, instrumental in reducing the potentially harmful impacts of coal use in energy production.

EES Amended Silicates' Products & Services:

Manufacturing EES Amended Silicates' products generates just 10% of CO₂ compared to PAC

  • Offer a significantly smaller carbon footprint than PAC, generating just 10% the CO2 in the course of production as carbon-based mercury capture agents
  • Are nonflammable and the mercury compounds that are generated are non-corrosive. Combined, these features limit potentially expensive damage to plant equipment and operations
  • Create an inert and insoluble solid reaction product, which will not leach mercury into area groundwater when stored
  • Result in useable gypsum, which can be sold for use in wall board products; and result in useable fly ash, which can be sold for concrete production instead of placed in landfills

Safe Storage & Handling

Other properties of mercury sorbents can be important in their full-scale deployment in operating power plants. EES Amended Silicates has continued to perform lab tests to document properties of our products with respect to several important criteria. Amended Silicates was shown to be non-explosive, with a Kst of zero. Significantly, that means there are no potential concerns with fire or explosion with the use, storage, and transport of Amended Silicates.


EES Amended Silicates completed Toxicity Characteristic Leaching Procedure (TCLP, EPA Method 1311) tests of Amended Silicates captured along with fly ash in a full-scale ESP. The samples easily passed the standard for leachable mercury, with a measured mercury level of just a few parts per billion in the leachate, significantly less than the EPA TCLP mercury standard for this Method of 200 ppb. Additional leaching tests have been run over a range of pH values following the new EPA Method 1313 as well. These tests also confirmed that mercury remains sequestered in the EES Amended Silicates sorbent/fly ash mixture over a range of pH from 7.7 to 13. In such tests, mercury was non-detectible or less than one part per billion, providing further evidence that the mercury captured by the EES Amended Silicates product will remain captured, even in fly ash that may be sluiced to a storage pond at the utility plant.