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Title: A new method for oxidation of gaseous, elemental mercury.

Abstract

Elemental mercury (Hg) is difficult to remove from flue-gas streams using existing wet-scrubber technology, primarily because of its limited volubility in water. We have proposed and tested a concept for enhancing gaseous Hg{sup 0}removal in wet scrubber systems by altering the chemical form of the Hg{sup 0} to a water-soluble oxidized species. Recently, we have discovered a new method for injection of the oxidizing species that dramatically improves reactant utilization and at the same time gives significant nitric oxide (NO) oxidation as well. Our method uses a diluted oxidizing solution containing chloric acid and sodium chlorate (sold commercially as NOXSORB{trademark}). When this solution is injected into a gas stream containing Hg{sup 0} at about 300 F, we found that nearly 100% of the Hg{sup 0} was removed from the gas phase and was recovered in liquid samples from the test system. At the same time, approximately 80% of the added NO was also removed (oxidized). The effect of sulfur dioxide (SO{sub 2}) on this method was also investigated, and it appears to decrease slightly the amount of Hg oxidized. We are currently testing the effect of variations in oxidizing solution concentration, SO{sub 2} concentration, NO concentration, and reaction time (residencemore » time).« less

Authors:
;
Publication Date:
Research Org.:
Argonne National Lab., IL (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
12435
Report Number(s):
ANL/ES/CP-98436
TRN: AH200120%%248
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Conference
Resource Relation:
Conference: Air and Waste Management Association Specialty Conference on Mercury in the Environment, Minneapolis, MN (US), 09/15/1999--09/17/1999; Other Information: PBD: 23 Aug 1999
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 54 ENVIRONMENTAL SCIENCES; FLUE GAS; DEMETALLIZATION; MERCURY; OXIDATION; SCRUBBERS; MERCURY OXIDES; REMOVAL; OXIDIZERS; NITRIC OXIDE; SORBENT INJECTION PROCESSES; CHEMICAL REACTION KINETICS; AIR POLLUTION CONTROL

Citation Formats

Livengood, C. D., and Mendelsohn, M. H. A new method for oxidation of gaseous, elemental mercury.. United States: N. p., 1999. Web.
Livengood, C. D., & Mendelsohn, M. H. A new method for oxidation of gaseous, elemental mercury.. United States.
Livengood, C. D., and Mendelsohn, M. H. Mon . "A new method for oxidation of gaseous, elemental mercury.". United States. https://www.osti.gov/servlets/purl/12435.
@article{osti_12435,
title = {A new method for oxidation of gaseous, elemental mercury.},
author = {Livengood, C. D. and Mendelsohn, M. H.},
abstractNote = {Elemental mercury (Hg) is difficult to remove from flue-gas streams using existing wet-scrubber technology, primarily because of its limited volubility in water. We have proposed and tested a concept for enhancing gaseous Hg{sup 0}removal in wet scrubber systems by altering the chemical form of the Hg{sup 0} to a water-soluble oxidized species. Recently, we have discovered a new method for injection of the oxidizing species that dramatically improves reactant utilization and at the same time gives significant nitric oxide (NO) oxidation as well. Our method uses a diluted oxidizing solution containing chloric acid and sodium chlorate (sold commercially as NOXSORB{trademark}). When this solution is injected into a gas stream containing Hg{sup 0} at about 300 F, we found that nearly 100% of the Hg{sup 0} was removed from the gas phase and was recovered in liquid samples from the test system. At the same time, approximately 80% of the added NO was also removed (oxidized). The effect of sulfur dioxide (SO{sub 2}) on this method was also investigated, and it appears to decrease slightly the amount of Hg oxidized. We are currently testing the effect of variations in oxidizing solution concentration, SO{sub 2} concentration, NO concentration, and reaction time (residence time).},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {8}
}

Conference:
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