Kinetics of sulfur and nitrogen reactions in combustion systems

Technical Report · Sat Feb 01 04:00:00 EST 1986

OSTI ID:5530159

Wendt, J O.L.; Dannecker, K M; Bose, A C ^[1]

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1. Arizona Univ., Tucson, AZ (USA). Dept. of Chemical Engineering

Chemical kinetic mechanisms governing the fate of coal nitrogen during fuel rich pulverized coal combustion were investigated. A 2 kg/h downflow plane flame combustor was utilized to obtain detailed time resolved profiles of temperature, major species, including H{sub 2} and hydrocarbons, and the volatile nitrogenous species. Eight coals ranging from a Utah Bituminous to a German Brown Coal were investigated. Each coal was burned at SR = 0.8 and at SR = 0.6. Supplementary experiments, in which NO was added to the incoming coal/air mixture, shifted the nitrogenous species distribution without altering temperature or major species profiles, and simulated, to a certain extent, the process of reburning. Speciation of coal nitrogen in this fuel rich stage of a pulverized coal, staged, combustion process depends strongly on the composition of the coal burned and not only on the temperature jet at which combustion takes place. Low grade coals yield substantially higher levels of NH{sub 3} than HCN while the converse is true for Bituminous Coals. The critical issue addressed here is whether data from a wide range of coals, burned under varied environments, can all be correlated through a single mechanism, namely that of Fenimore, even though absolute and relative values of NO, HCN, NH{sub 3}, H{sub 2} and H{sub 2}O may vary widely from case to case. 21 refs., 39 figs., 2 tabs.

• Research Organization: Energy and Environmental Research Corp., Irvine, CA (United States); Arizona Univ., Tucson, AZ (United States). Dept. of Chemical Engineering
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC22-84PC70771
• OSTI ID: 5530159
• Report Number(s): DOE/PC/70771-T17; ON: DE91015691
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600 -- Coal
Lignite
& Peat-- Properties & Composition
014000* -- Coal
Lignite
& Peat-- Combustion
AMMONIA
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL
COAL RANK
COMBUSTION
CYANIDES
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDRIDES
HYDROCYANIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
KINETICS
MATERIALS
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NITROGEN OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
THERMOCHEMICAL PROCESSES