Document Detail


Survey of catalysts for oxidation of mercury in flue gas.
MedLine Citation:
PMID:  17007115     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Methods for removing mercury from flue gas have received increased attention because of recent limitations placed on mercury emissions from coal-fired utility boilers by the U. S. Environmental Protection Agency and various states. A promising method for mercury removal is catalytic oxidation of elemental mercury (Hg0) to oxidized mercury (Hg2+), followed by wet flue gas desulfurization (FGD). FGD cannot remove Hg0, but easily removes Hg2+ because of its solubility in water. To date, research has focused on three broad catalyst areas: selective catalytic reduction catalysts, carbon-based materials, and metals and metal oxides. We review published results for each type of catalyst and also present a discussion on the possible reaction mechanisms in each case. One of the major sources of uncertainty in understanding catalytic mercury oxidation is a lack of knowledge of the reaction mechanisms and kinetics. Thus, we propose that future research in this area should focus on two major aspects: determining the reaction mechanism and kinetics and searching for more cost-effective catalyst and support materials.
Authors:
Albert A Presto; Evan J Granite
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.; Review    
Journal Detail:
Title:  Environmental science & technology     Volume:  40     ISSN:  0013-936X     ISO Abbreviation:  Environ. Sci. Technol.     Publication Date:  2006 Sep 
Date Detail:
Created Date:  2006-09-29     Completed Date:  2006-12-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0213155     Medline TA:  Environ Sci Technol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  5601-9     Citation Subset:  IM    
Affiliation:
National Energy Technology Laboratory, United States Department of Energy, P.O. Box 10940, MS 58-103A, Pittsburgh, Pennsylvania 15236-0940, USA.
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MeSH Terms
Descriptor/Qualifier:
Air Pollutants / chemistry*,  isolation & purification
Air Pollution / prevention & control
Catalysis
Coal*
Gases / chemistry
Mercury / chemistry*,  isolation & purification
Metals / chemistry
Oxidation-Reduction
Oxides / chemistry
Chemical
Reg. No./Substance:
0/Air Pollutants; 0/Coal; 0/Gases; 0/Metals; 0/Oxides; 7439-97-6/Mercury

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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