Influence of coal composition on the effectiveness of NO/sub x/ control technology

Conference · Sat Jan 01 04:00:00 EST 1983

OSTI ID:6228593

Chen, S L; Greene, S B; Heap, M P; Pershing, D W; Seeker, W R

This paper summarizes experimental results regarding the influence of coal properties on the potential effectiveness of low NO/sub x/ combustion concepts. Fifty fuels from North America, Europe, Asia, South Africa, and Australia were burned in a 21 kilowatt refractory-lined tunnel furnace to assess the importance of coal chemistry. The results were correlated in terms of total fuel nitrogen, volatile nitrogen yield, proximate composition, and char nitrogen content. The low NO/sub x/ concepts which were studied included both conventional staged combustion and secondary fuel addition (reburning). With both technologies, detailed in-flame measurements were made at the exit of the fuel-rich zone to characterize the fate of the gaseous fuel nitrogen species (NO, HCN, NH/sub 3/) and the retention of the solid phase nitrogen (char nitrogen). TFN (NH/sub 3/ + NO + HCN) was found to be a function of fuel composition and thermal environment. In general, HCN was greater than NH/sub 3/ with bituminous coals, but less than NH/sub 3/ with sub-bituminous and lignite coals. With both technologies the importance of coal chemistry was strongly coupled with the heat extraction rate because of dramatically decreased TFN conversion to exhaust NO under optimum thermal conditions. In each case the controlling mechanism appears to be selective reduction of NO by NH/sub i/ species.

• Research Organization: Energy and Environmental Research Corp., Irvine, CA (USA)
• OSTI ID: 6228593
• Report Number(s): CSS/CI-83-03; CONF-830358-6; ON: DE83902583
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800 -- Combustion
Pyrolysis
& High-Temperature Chemistry
AMMONIA
BITUMINOUS COAL
BLACK COAL
BROWN COAL
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHARS
CHEMICAL COMPOSITION
COAL
COMBUSTION CONTROL
COMBUSTION PROPERTIES
CONTROL
CORRELATIONS
CYANIDES
ELEMENTS
ENERGY SOURCES
FLAMES
FOSSIL FUELS
FUELS
HYDRIDES
HYDROCYANIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
LIGNITE
MATERIALS
NITROGEN
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NITROGEN OXIDES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS PRODUCTS
SUBBITUMINOUS COAL