Record Display for the EPA National Library Catalog

RECORD NUMBER: 593 OF 1177

OLS Field Name OLS Field Data
Main Title In-Flight Capture of Elemental Mercury by a Chlorine-Impregnated Activated Carbon.
Author Ghorishi, S. B. ; Keeney, R. M. ; Jozewicz, W. S. ; Serre, S. D. ; Gullett, B. K. ;
CORP Author ARCADIS Geraghty and Miller, Durham, NC.;Environmental Protection Agency, Research Triangle Park, NC. Air Pollution Prevention and Control Div.
Publisher 2001
Year Published 2001
Report Number EPA-68-C-99-201; EPA/600/A-01/058;
Stock Number PB2001-107760
Additional Subjects Air pollution control ; Mercury(Metal) ; Activated carbon ; Adsorption ; Emission ; Flue gases ; Chlorine ; Sorbent ; Combustion ; Particles sizes ; Stationary sources ; Temperature ; Lignite ; Coal products ; Air entrainment ; Boilers ; Flow reactor ; Elemental mercury
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NTIS  PB2001-107760 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 10/17/2002
Collation 16p
Abstract
The paper discusses the in-flight capture of elemental mercury (Hgo) by a chlorine (CI)-impregnated activated carbon. Efforts to develop sorbents for the carbons using dilute solutions of hydrogen chloride (HCI) leads to substantial increases in Hg capture. HCI treatment at ambient temperature of a commonly used, commercially available activated carbon-DARCO FGD, NORIT Americas, Inc.-has previously been shown to result in significant improvement in the fixed-bed capture of Hgo and mercuric chloride (HgC12). In the study presented here, the C1-impregnation process was optimized for Hg capture based on comparative testing in a bench-scale, fixed-bed Hgo absorption system. The optimized sorbent was then produced on a larger scale (5 lb per batch) and tested for in-flight, short-time-scale capture of Hgo in a flow reactor. The sorbent was entrained in Hgo-laden flue gases of varied compositions with gas/solid contact times of about 3-4 s. C1-impregnated FGD exhibited significant Hgo removal (80-90%), compared to virgin FGD (10-15%), across the whole range of very low carbon-to-mercury weight ratios (1000-1 to 5000-1). Preliminary cost estimates indicated that approximately 53% reduction of the total annual cost of Hg control could be possible when using C1-impregnated FGD.