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Title: Nitration of polynuclear aromatic hydrocarbons in coal combustors and exhaust streams. [Determination of conditions of nitration, reactions,etc]

Abstract

Nitro-polynuclear aromatic hydrocarbons (nitro-PAH) are the predominant mutagens on respirable particles from coal-fired boilers. Since nitro-PAH are not primary products of coal devolatilization, their formation must involve secondary chemistry at elevated temperatures. However, it is not known where in the combustion or exhaust processes they form, which reaction species are involved, or how concentrations are influenced by operating conditions. Results from this study will help to relate the environmental impact of mutagenic emissions to boiler firing strategies. The objectives of this three-year project are to (1) identify the conditions which promote the nitration of PAH during primary combustion, reburning, hot gas cleanup, and particulate removal; and (2) investigate the potential relationship between NO{sub x} abatement and PAH nitration. A novel coal flow reactor burning actual coal products operates over the domains of heating rates, temperatures, fuel-equivalence ratios, and residence times in utility boilers. A fluidized bed will be built for studies of simulated hot gas cleanup at lower temperatures. Gas chromatography with chemiluminescence detection will measure the aggregate amount of nitro groups present, to determine when nitro-PAH first appear, and how nitration is affected by the operating conditions. Tars from primary and secondary pyrolysis and oxidative pyrolysis will be fractionatedmore » into chain hydrocarbons, polynuclear aromatics, oxygenated species, and a basic fraction, so that their ring number distribution can be monitored with high performance liquid chromatography.« less

Authors:
; ; ;
Publication Date:
Research Org.:
Stanford Univ., CA (United States)
Sponsoring Org.:
USDOE; USDOE, Washington, DC (United States)
OSTI Identifier:
7193853
Report Number(s):
DOE/PC/91284-T1
ON: DE93000916
DOE Contract Number:  
FG22-91PC91284
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
20 FOSSIL-FUELED POWER PLANTS; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; COAL; COMBUSTION; COAL TAR; FRACTIONATION; LIQUID COLUMN CHROMATOGRAPHY; MUTAGENS; EMISSION; POLYCYCLIC AROMATIC HYDROCARBONS; NITRATION; BOILERS; CHEMILUMINESCENCE; FLUE GAS; FLUIDIZED BEDS; GAS CHROMATOGRAPHY; NUMERICAL DATA; PLANNING; PROGRESS REPORT; AROMATICS; CARBONACEOUS MATERIALS; CHEMICAL REACTIONS; CHROMATOGRAPHY; DATA; DOCUMENT TYPES; ENERGY SOURCES; FOSSIL FUELS; FUELS; GASEOUS WASTES; HYDROCARBONS; INFORMATION; LUMINESCENCE; MATERIALS; ORGANIC COMPOUNDS; OTHER ORGANIC COMPOUNDS; OXIDATION; SEPARATION PROCESSES; TAR; THERMOCHEMICAL PROCESSES; WASTES; 200202* - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions; 400201 - Chemical & Physicochemical Properties

Citation Formats

Yu, Liya, Dadamio, J, Hildemann, L, and Niksa, S. Nitration of polynuclear aromatic hydrocarbons in coal combustors and exhaust streams. [Determination of conditions of nitration, reactions,etc]. United States: N. p., 1992. Web. doi:10.2172/7193853.
Yu, Liya, Dadamio, J, Hildemann, L, & Niksa, S. Nitration of polynuclear aromatic hydrocarbons in coal combustors and exhaust streams. [Determination of conditions of nitration, reactions,etc]. United States. https://doi.org/10.2172/7193853
Yu, Liya, Dadamio, J, Hildemann, L, and Niksa, S. 1992. "Nitration of polynuclear aromatic hydrocarbons in coal combustors and exhaust streams. [Determination of conditions of nitration, reactions,etc]". United States. https://doi.org/10.2172/7193853. https://www.osti.gov/servlets/purl/7193853.
@article{osti_7193853,
title = {Nitration of polynuclear aromatic hydrocarbons in coal combustors and exhaust streams. [Determination of conditions of nitration, reactions,etc]},
author = {Yu, Liya and Dadamio, J and Hildemann, L and Niksa, S},
abstractNote = {Nitro-polynuclear aromatic hydrocarbons (nitro-PAH) are the predominant mutagens on respirable particles from coal-fired boilers. Since nitro-PAH are not primary products of coal devolatilization, their formation must involve secondary chemistry at elevated temperatures. However, it is not known where in the combustion or exhaust processes they form, which reaction species are involved, or how concentrations are influenced by operating conditions. Results from this study will help to relate the environmental impact of mutagenic emissions to boiler firing strategies. The objectives of this three-year project are to (1) identify the conditions which promote the nitration of PAH during primary combustion, reburning, hot gas cleanup, and particulate removal; and (2) investigate the potential relationship between NO{sub x} abatement and PAH nitration. A novel coal flow reactor burning actual coal products operates over the domains of heating rates, temperatures, fuel-equivalence ratios, and residence times in utility boilers. A fluidized bed will be built for studies of simulated hot gas cleanup at lower temperatures. Gas chromatography with chemiluminescence detection will measure the aggregate amount of nitro groups present, to determine when nitro-PAH first appear, and how nitration is affected by the operating conditions. Tars from primary and secondary pyrolysis and oxidative pyrolysis will be fractionated into chain hydrocarbons, polynuclear aromatics, oxygenated species, and a basic fraction, so that their ring number distribution can be monitored with high performance liquid chromatography.},
doi = {10.2172/7193853},
url = {https://www.osti.gov/biblio/7193853}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Aug 01 00:00:00 EDT 1992},
month = {Sat Aug 01 00:00:00 EDT 1992}
}