Coal gasification reactions with on-line in-situ FT-IR analysis. Tenth quarterly report, December 3, 1983-March 3, 1984

Technical Report · Thu May 03 04:00:00 EDT 1984

OSTI ID:5361961

Solomon, P R; Serio, M A; Hamblen, D G; Best, P E; Markham, J R

During the tenth quarter, work continued on the measurement of coal particle temperature during pyrolysis using FT-IR transmission and emission spectroscopy. The transmission spectra were used to normalize the emission spectra for particles which cover only a fraction of the viewing area. These normalized emission spectra were then compared to theoretical black-body curves at the furnace wall temperatures. At particle temperatures much lower than the wall temperatures it was previously reported that the phenomenon whereby the coal spectrum is chewed out of the emission spectrum was explained by a ''hot core'' model of the particle, i.e., the surface temperature was colder than the interior. It has now been determined that this effect is due to scattering of radiation from the furnace walls. The magnitude of the scattering contribution can be determined by comparing results from the entrained flow reactor (with scattering) to the heated tube reactor (no scattering). Work was also done on demonstrating the relationship between the extent of pyrolysis and the functional group composition. This involved a set of experiments in which bituminous coal was heated at a constant rate of 30/sup 0/C/min starting at 150/sup 0/C and ending at a series of temperatures between 350 and 950/sup 0/C. Quantitative FT-IR spectra were taken of the product chars. In addition, work has continued on analysis of tar evolution using the Field Ionization Mass Spectrometry (FIMS) technique. A comparison was made of tars produced from lignite coal by slow and fast heating. Significant differences were observed in the spectra which have been explained based on cross-linking during primary pyrolysis. There did not appear to be evidence for appreciable cross-linking in analogous experiments with bituminous coals. 12 refs., 15 figs.

• Research Organization: Advanced Fuel Research, Inc., East Hartford, CT (USA)
• DOE Contract Number: AC21-81FE05122
• OSTI ID: 5361961
• Report Number(s): DOE/FE/05122-2114; ON: DE86014841
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
010406 -- Coal & Coal Products-- Pyrolysis & Cracking-- (-1987)
BITUMINOUS COAL
BLACK COAL
BROWN COAL
CARBONACEOUS MATERIALS
CHARS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL
COAL GASIFICATION
COAL TAR
COMPARATIVE EVALUATIONS
CROSS-LINKING
DATA
DECOMPOSITION
ELEMENTS
EMISSION SPECTRA
ENERGY SOURCES
EXPERIMENTAL DATA
FLUIDS
FOSSIL FUELS
FUELS
GASES
GASIFICATION
HEATING RATE
HELIUM
INFORMATION
INFRARED SPECTRA
KINETICS
LIGNITE
MASS SPECTRA
MATERIALS
MOLECULAR WEIGHT
NITROGEN
NONMETALS
NUMERICAL DATA
ON-LINE MEASUREMENT SYSTEMS
ON-LINE SYSTEMS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PARTICLES
PARTICULATES
POLYMERIZATION
PYROLYSIS
PYROLYSIS PRODUCTS
RARE GASES
REACTION KINETICS
RESEARCH PROGRAMS
SPECTRA
TAR
TEMPERATURE MEASUREMENT
THERMOCHEMICAL PROCESSES
VERY HIGH TEMPERATURE