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Title: Nitrous oxide emissions from fossil-fuel combustion

Abstract

The role of coal combustion as a significant global source of nitrous oxide (N2O) emissions was reexamined through on-line emission measurements from six pulverized-coal-fired utility boilers and from laboratory and pilot-scale combustors. The full-scale utility boilers yielded direct N2O emission levels of less than 5 ppm. The sub-scale combustor test data were consistent with full-scale data, and also showed N2O emission levels not exceeding 5 ppm, although these levels increased slightly when various combustion modifications to lower NO emissions were employed. These on-line emission measurements are very different from previously published data. The discrepancy is shown to be due to a sampling artifact by which significant quantities of N2O can be produced in sample containers which have been used in establishing the prevously employed N2O data base. Consequently, it was concluded that N2O emissions bear no direct relationship to NO emissions from these combustion sources, and that the direct source of N2O is negligible. Other indirect routes for the conversion of NO into N2O outside the combustor and other combustion sources not examined by the study, however, cannot be ruled out. (Copyright (c) 1990 by the American Geophysical Union.)

Authors:
; ; ; ;
Publication Date:
Research Org.:
Acurex Corp., Research Triangle Park, NC (United States)
OSTI Identifier:
5601392
Alternate Identifier(s):
OSTI ID: 5601392
Report Number(s):
PB-91-171496/XAB
CNN: EPA-68-02-4701; EPA-68-02-4285
Resource Type:
Technical Report
Resource Relation:
Other Information: Pub. in Jnl. of Geophysical Research, v95 nD6 p7533-7541, 20 May 90. Prepared in cooperation with Arizona Univ., Tucson. Dept. of Chemical Engineering. Sponsored by Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 20 FOSSIL-FUELED POWER PLANTS; 54 ENVIRONMENTAL SCIENCES; COAL; ENVIRONMENTAL EFFECTS; FOSSIL-FUEL POWER PLANTS; NITROUS OXIDE; EMISSION; AIR POLLUTION; AIR POLLUTION CONTROL; BENCH-SCALE EXPERIMENTS; BOILERS; COMBUSTION; COMBUSTORS; CORRELATIONS; NITRIC OXIDE; ON-LINE MEASUREMENT SYSTEMS; PILOT PLANTS; PULVERIZED FUELS; SAMPLING; CARBONACEOUS MATERIALS; CHALCOGENIDES; CHEMICAL REACTIONS; CONTROL; ENERGY SOURCES; FOSSIL FUELS; FUELS; FUNCTIONAL MODELS; MATERIALS; NITROGEN COMPOUNDS; NITROGEN OXIDES; ON-LINE SYSTEMS; OXIDATION; OXIDES; OXYGEN COMPOUNDS; POLLUTION; POLLUTION CONTROL; POWER PLANTS; THERMAL POWER PLANTS; THERMOCHEMICAL PROCESSES 010900* -- Coal, Lignite, & Peat-- Environmental Aspects; 200500 -- Fossil-Fueled Power Plants-- Environmental Aspects-- (1990-); 540120 -- Environment, Atmospheric-- Chemicals Monitoring & Transport-- (1990-)

Citation Formats

Linak, W.P., McSorley, J.A., Hall, R.E., Ryan, J.V., and Wendt, J.O.L. Nitrous oxide emissions from fossil-fuel combustion. United States: N. p., 1990. Web.
Linak, W.P., McSorley, J.A., Hall, R.E., Ryan, J.V., & Wendt, J.O.L. Nitrous oxide emissions from fossil-fuel combustion. United States.
Linak, W.P., McSorley, J.A., Hall, R.E., Ryan, J.V., and Wendt, J.O.L. Mon . "Nitrous oxide emissions from fossil-fuel combustion". United States. doi:.
@article{osti_5601392,
title = {Nitrous oxide emissions from fossil-fuel combustion},
author = {Linak, W.P. and McSorley, J.A. and Hall, R.E. and Ryan, J.V. and Wendt, J.O.L.},
abstractNote = {The role of coal combustion as a significant global source of nitrous oxide (N2O) emissions was reexamined through on-line emission measurements from six pulverized-coal-fired utility boilers and from laboratory and pilot-scale combustors. The full-scale utility boilers yielded direct N2O emission levels of less than 5 ppm. The sub-scale combustor test data were consistent with full-scale data, and also showed N2O emission levels not exceeding 5 ppm, although these levels increased slightly when various combustion modifications to lower NO emissions were employed. These on-line emission measurements are very different from previously published data. The discrepancy is shown to be due to a sampling artifact by which significant quantities of N2O can be produced in sample containers which have been used in establishing the prevously employed N2O data base. Consequently, it was concluded that N2O emissions bear no direct relationship to NO emissions from these combustion sources, and that the direct source of N2O is negligible. Other indirect routes for the conversion of NO into N2O outside the combustor and other combustion sources not examined by the study, however, cannot be ruled out. (Copyright (c) 1990 by the American Geophysical Union.)},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 1990},
month = {Mon Jan 01 00:00:00 EST 1990}
}

Technical Report:
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