Development of Cost-Effective Noncarbon Sorbents for Hg super(0) Removal from Coal-Fired Power Plants

The development of cost-effective noncarbon sorbents for Hg super(0) removal from coal-fired power plants is discussed. Noncarbonaceous materials or mineral oxides are modified with various functional groups namely amine, amide, thiol, urea and active additives such as elemental mercury vapor at coa...

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Bibliographic Details
Published in:Environmental science & technology 2006-04, Vol.40 (8), p.2714-2714
Main Authors: Lee, Joo-Youp, Ju, Yuhong, Keener, Tim C, Varma, Rajender S
Format: Article
Language:English
Online Access:Get full text
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Summary:The development of cost-effective noncarbon sorbents for Hg super(0) removal from coal-fired power plants is discussed. Noncarbonaceous materials or mineral oxides are modified with various functional groups namely amine, amide, thiol, urea and active additives such as elemental mercury vapor at coal-fired utility power plants. A number of sorbent candidates namely, 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, are synthesized and tested in a lab-scale fixed-bed system under an argon flow for screening purposes at 70 degree C and/or 140 degree C. It is found that among elemental sulfur-, sodium sulfide- and sodium polysulfide-impregnated inorganic samples, sodium polysulfide-impregnated inorganic samples, sodium polysulfide-impregnated montmorillonite K 10 showed a moderate adsorption capacity at 70 degree C, which can be used for sorbent injection prior to the wet FGD system.
ISSN:0013-936X