Nitric oxide formation during pulverized-coal combustion

Technical Report · Thu Dec 31 23:00:00 EST 1981

OSTI ID:5953232

Song, Y H; Pohl, J H; Beer, J M; Sarofim, A F

The paper discusses the formation of nitrogen oxides (NOx) during pulverized coal combustion. Data on the overall conversion of coal-nitrogen to NOx were obtained at 1250 and 1750 K for a residence time of 1 second. The conversion of coal-nitrogen to NOx decreased monotonically with increasing fuel/oxygen equivalence ratio and decreased slightly with increasing temperature. Oxidation experiments were also carried out on char to separate the contribution to NOx emissions of the char from that of the volatiles. The char used was prepared by the pyrolysis of coal at a temperature and residence time corresponding to those of oxidation experiments. The conversion to NOx of char-nitrogen was lower than the corresponding value for coal-nitrogen. It was found that volatilized nitrogen compounds accounted for a major fraction of NOx produced from coal-nitrogen, especially at high temperatures and low fuel/oxygen equivalence ratios.

• Research Organization: Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Chemical Engineering
• OSTI ID: 5953232
• Report Number(s): PB-92-121433/XAB; CNN: EPA-R805515
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
014000 -- Coal
Lignite
& Peat-- Combustion
AIR POLLUTION
AIR POLLUTION CONTROL
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHARS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL
COMBUSTION KINETICS
CONTROL
DECOMPOSITION
ENERGY SOURCES
FLAMES
FOSSIL FUELS
FUEL-AIR RATIO
FUELS
KINETICS
MATERIALS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION
POLLUTION CONTROL
PULVERIZED FUELS
PYROLYSIS
PYROLYSIS PRODUCTS
REACTION KINETICS
SYNTHESIS
TEMPERATURE RANGE
TEMPERATURE RANGE 1000-4000 K
THERMOCHEMICAL PROCESSES
TIME DEPENDENCE
VOLATILITY