Fate of fuel-sulfur in backmixed combustion systems. Final report, August 1979-January 1980
Comprehensive sulfur species measurements were performed on combustion gases in a premixed, jet-stirred reactor containing 0.23 mole % total sulfur. Species measured were H/sub 2/S, COS, CS/sub 2/, C/sub 4/H/sub 4/S, SO/sub 2/, O/sub 2/, CH/sub 2/, and C/sub 2/H/sub 2/ by gas chromatography; relative SH and CS and absolute OH by uv absorption spectroscopy; and SO/sub 3/ by controlled condensation. Reactor fuels were C/sub 3/H/sub 8/, C/sub 2/H/sub 2/, CH/sub 4/, H/sub 2/, and a H/sub 2//CO mixture. Sulfur dopants were C/sub 4/H/sub 4/S, H/sub 2/S, and SO/sub 2/. Reactor conditions were 1600 less than or equal to T less than or equal to 1800/sup 0/K, 0.7 less than or equal to PHI less than or equal to 1.7, and 3.5 less than or equal to tau less than or equal to 7 ms. Pressure was 0.9 atm, except for SO/sub 3/ measurements at 0.9 less than or equal to P less than or equal to 2.9 atm. SO/sub 2/ was always the dominant product. In fuel-rich flames lacking significant hydrocarbons, H/sub 2/S was the stable non-SO/sub 2/ product sampled - of order 5% yield. In hydrocarbon flames at richer conditions, COS and CS/sub 2/ replaced H/sub 2/S as the non-SO/sub 2/ product. Kinetic interpretation indicated that internal equilibration of the S-H-O subsystem occurred and that H/sub 2/S, COS and CS/sub 2/ likely formed within the sample probe through reaction of SO. The SO/sub 3/ measurements, in conjunction with inference of 0-atom concentrations from measured OH, indicated that the reaction SO/sub 2/ + 0 + M ..-->.. SO/sub 3/ + M predicts SO/sub 3/ formation provided that a second order pressure limit of 0.3 atm is assumed. A pulverized coal combustion reactor was also used to study the behavior of sulfur. The combustion chamber burned a mass mixture of half propane and half pulverized coal in a recirculating flame with a thermal output of 5 to 9 kW. Temperature and concentrations of SO/sub 2/, H/sub 2/S, CO, CO/sub 2/ and O were mapped throughout the combustion chamber for Utah coal burned at fuel-air equivalence ratios of PHI = 0.9, 1.2, and 1.6.
- Research Organization:
- Washington State Univ., Pullman (USA). Dept. of Mechanical Engineering
- DOE Contract Number:
- AC01-76ET10613
- OSTI ID:
- 5133632
- Report Number(s):
- FE-2252-15
- Country of Publication:
- United States
- Language:
- English
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ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
10 SYNTHETIC FUELS
01 COAL, LIGNITE, AND PEAT
ACETYLENE
COMBUSTION
COAL
COMBUSTION PRODUCTS
CHEMICAL COMPOSITION
METHANE
PROPANE
SULFUR DIOXIDE
OXIDATION
ABSORPTION SPECTROSCOPY
CARBON OXYSULFIDE
CARBON SULFIDES
CHEMICAL REACTIONS
CHEMICAL STATE
COMBUSTION CHAMBERS
EXPERIMENTAL DATA
GAS CHROMATOGRAPHY
HYDROGEN
HYDROGEN SULFIDES
STRUCTURAL MODELS
SULFUR
THIOPHENE
ALKANES
ALKYNES
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHROMATOGRAPHY
DATA
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
HYDROGEN COMPOUNDS
INFORMATION
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SEPARATION PROCESSES
SPECTROSCOPY
SULFIDES
SULFUR COMPOUNDS
SULFUR OXIDES
THERMOCHEMICAL PROCESSES
400800* - Combustion
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090110 - Hydrocarbon Fuels- Properties- (1979-1989)
014000 - Coal
Lignite
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