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Title: REDUCTION OF INHERENT MERCURY EMISSIONS IN PC COMBUSTION

Abstract

Mercury emission compliance is one of the major potential challenges raised by the 1990 Clean Air Act Amendments. Simple ways of controlling emissions have not been identified. The variability in the field data suggests that inherent mercury emissions may be reduced if the source of this inherent capture can be identified and controlled. The key mechanisms appear to involve the oxidation of the mercury to Hg{sup 2}, generally producing the more reactive HgCl{sub 2} , followed by its capture by certain components of the fly ash or char. This research focuses on identifying the rate-limiting steps associated with the oxidation step. Work in this reporting period focused on the development and application of a kinetics model to the oxidation data developed in the present program and literature data under MSW conditions. The results indicate that the pathway Hg + Cl = HgCl followed by HgCl + HCl = HgCl{sub 2} + H predominates over Hg + Cl{sub 2} under high-temperature conditions. This primarily occurs because Cl{sub 2} concentrations are too low under the present conditions to contribute significantly.

Authors:
; ;
Publication Date:
Research Org.:
Federal Energy Technology Center, Morgantown, WV (US); Federal Energy Technology Center, Pittsburgh, PA (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
775018
Report Number(s):
DE-FG22-95PC95216-06
TRN: AH200110%%34
DOE Contract Number:  
FG22-95PC95216
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 6 Aug 1999
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; 01 COAL, LIGNITE, AND PEAT; COMBUSTION; FLY ASH; CHEMICAL REACTION KINETICS; MERCURY; OXIDATION; AIR POLLUTION ABATEMENT; MERCURY CHLORIDES; KINETIC EQUATIONS; MUNICIPAL WASTES; SOLID WASTES; COAL; PULVERIZED FUELS

Citation Formats

John C. Kramlich, Rebecca N. Sliger, and David J. Going. REDUCTION OF INHERENT MERCURY EMISSIONS IN PC COMBUSTION. United States: N. p., 1999. Web. doi:10.2172/775018.
John C. Kramlich, Rebecca N. Sliger, & David J. Going. REDUCTION OF INHERENT MERCURY EMISSIONS IN PC COMBUSTION. United States. doi:10.2172/775018.
John C. Kramlich, Rebecca N. Sliger, and David J. Going. Fri . "REDUCTION OF INHERENT MERCURY EMISSIONS IN PC COMBUSTION". United States. doi:10.2172/775018. https://www.osti.gov/servlets/purl/775018.
@article{osti_775018,
title = {REDUCTION OF INHERENT MERCURY EMISSIONS IN PC COMBUSTION},
author = {John C. Kramlich and Rebecca N. Sliger and David J. Going},
abstractNote = {Mercury emission compliance is one of the major potential challenges raised by the 1990 Clean Air Act Amendments. Simple ways of controlling emissions have not been identified. The variability in the field data suggests that inherent mercury emissions may be reduced if the source of this inherent capture can be identified and controlled. The key mechanisms appear to involve the oxidation of the mercury to Hg{sup 2}, generally producing the more reactive HgCl{sub 2} , followed by its capture by certain components of the fly ash or char. This research focuses on identifying the rate-limiting steps associated with the oxidation step. Work in this reporting period focused on the development and application of a kinetics model to the oxidation data developed in the present program and literature data under MSW conditions. The results indicate that the pathway Hg + Cl = HgCl followed by HgCl + HCl = HgCl{sub 2} + H predominates over Hg + Cl{sub 2} under high-temperature conditions. This primarily occurs because Cl{sub 2} concentrations are too low under the present conditions to contribute significantly.},
doi = {10.2172/775018},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {8}
}