Citation:

LEE, J., Y. JU, T. C. KEENER, AND R. S. VARMA. DEVELOPMENT OF COST-EFFECTIVE NONCARBON SORBENTS FOR HG⁰ REMOVAL FROM COAL-FIRED POWER PLANTS. J. Schnoor (ed.), ENVIRONMENTAL SCIENCE AND TECHNOLOGY. American Chemical Society, Washington, DC, 40(8):2714-2720, (2006).

Description:

Noncarbon materials or mineral oxides (silica gel, alumina, molecular sieves, zeolites, and montmorillonite) were modified with various functional groups such as amine, amide, thiol, urea and active additives such as elemental mercury (Hg⁰) vapor at coal-fired utility power plants. A number of sorbent candidates such as amine- silica gel, urea- silica gel, thiol- silica gel, amide-silica gel, sulfur-alumina, sulfur-molecular sieve, sulfur-montmorillonite, sodium sulfide-montmorillonite, and sodium polysulfide-montmorillonite, were synthesized and tested in a lab-scale fixed-bed system under an argon flow for screening purpose at 70°C and/or 140°C. The results show that sodium polysulfide-impregnated montmorillonite may be applied as a sorbent prior to wet scrubbers where a temperature window exists between 65°C and 70°C.

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