410 and P60 HgFree carbons are steam activated and made from select grades of coal that are chemically impregnated for mercury control from vapor streams. Through careful addition of elemental sulfur to the base carbon, the carbon‘s capacity to adsorb mercury to stringent removal efficiencies is obtained.
As an activated carbon product, HgFree carbons retain their adsorption capacity for the removal of volatile organic compounds (VOCs) while adding the ability to remove mercury as well.
Unlike other grades of sulfur impregnated carbons for mercury removal on the market today, HgFree carbons are impregnated with the S2 form of sulfur only. The carbon has a high affinity for this form of sulfur which is uniformly distributed throughout the carbon’s pore structure, resulting in superior mercury removal performance when treating a variety of gas streams.
Independent laboratory testing of HgFree compared to other mercury adsorbents on the market today indicated improved performance in several categories:
- Overall mercury capacity
- Reduced mercury leachability in TCLP extractions
- Reduced sulfur loss at elevated temperatures
- Higher residual organic adsorption capacity
- Improved kinetics for lower residual mercury concentrations in effluent