Laser diagnostics of mineral matter and combustion processes in coal

Technical Report · Sun Jan 01 00:00:00 EST 1989

DOI:https://doi.org/10.2172/5500033· OSTI ID:5500033

Venkateswarlu, P.; George, M. C.; Sekhar, P. C.; Subbarao, V.

This is the third report on this project. During the period covered by the first two reports (October 1, 1987 through August 30, 1988) a sample of low sulfur powdered coal was heated under vacuum from 25 to 1000{degrees}C at a heating rate of 5{degrees}C per minute. The vapors generated were analyzed by a Balzer Quadrupole Mass Spectrometer model QMG 511. The analysis showed that the major constituents of the vapors are aliphatic hydrocarbons. A second set of experiments were carried out to determine the mineral constituents in ash obtained by heating coal in a porcelain crucible at 400--500{degrees}C in a muffle furnace until all the coal was oxidized. Model 3030 Perkin Elmer Atomic Absorption Spectrophotometer was used with appropriate hollow cathode lamps. A dozen elements were identified. Al, Na, K and Fe were the most prominent. During this period we have made an extensive series of measurements on laser induced combustion of coal pellets made from coal powder. C{sub 2}, CN, CO, Na and K were identified from the spectra. We have also fabricated a burner for the study of coal combustion using laser spectroscopic techniques. 1 ref., 4 figs.

• Research Organization: Alabama A and M Univ., Normal, AL (USA)
• Sponsoring Organization: DOE/FE
• DOE Contract Number: FG22-87PC79906
• OSTI ID: 5500033
• Report Number(s): DOE/PC/79906-T2; ON: DE90002870
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL
COMBUSTION PRODUCTS
ASHES
HEAT TREATMENTS
LASER SPECTROSCOPY
MINERALS
PROGRESS REPORT
SPECTRA
VAPORS
CARBONACEOUS MATERIALS
DOCUMENT TYPES
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
GASES
MATERIALS
RESIDUES
SPECTROSCOPY
014000* - Coal
Lignite
& Peat- Combustion
010600 - Coal
Lignite
& Peat- Properties & Composition