Basic studies of coal pyrolysis and hydrogasification. Quarterly progress report, January 1, 1978--March 31, 1978

Technical Report · Mon May 01 00:00:00 EDT 1978

DOI:https://doi.org/10.2172/6634879· OSTI ID:6634879

Bush, T. W.; Denholm, D.; Dolan, J.; Franklin, H.; Howard, J. B.; Kenda, S.; Mead, D.; Peters, W. A.

In order to be able to investigate the effect of particle size on pyrolysis and hydropyrolysis, coal samples of different diameter but of essentially the same composition must be used. Criteria for compositional invariance employed in this work include constancy of ash and maceral analysis. Work during this quarter focused primarily on establishing a technique for producing size fractions of essentially constant ash content. Results from maceral analysis will be reported later. A continuing effort has been made to identify and quantitatively analyze the volatile products recovered from cryogenic gas traps downstream of the flow reactor. The products are eluted from the cryo-traps into a temperature-programmable gas chromatograph equipped with flame ionization and thermal conductivity detectors. The following gases and liquids are now identified by their characteristic retention times under these conditions: carbon monoxide, methane, carbon dioxide, ethylene/acetylene, ethane, ammonia, hydrogen sulfide/water, carbonyl sulfide, propylene, propane, hydrogen cyanide, the butane isomers, methylene chloride, carbon disulfide, benzene/thiophene, and toluene. All of these compounds except ammonia have been observed on actual coal runs. The pyrolysis behavior of fairly high ash samples (approximately 20.1 percent) of 45 to 53 ..mu..m Pittsburgh No. 8 seam bituminous coal has been studied over the temperature range 600 to 1100/sup 0/C under laminar entrained flow conditions and the results are summarized. Preliminary characterization of the mineral matter in coal was obtained by both x-ray diffraction and instrumental neutron activation analysis.

• Research Organization: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
• DOE Contract Number: EX-76-C-01-2295-026
• OSTI ID: 6634879
• Report Number(s): FE-MIT-2295T26-5
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
CHARS
YIELDS
COAL
CHEMICAL COMPOSITION
CLASSIFICATION
HYDROGENATION
PYROLYSIS
COAL GAS
COAL TAR
MINERALS
ACTIVATION ANALYSIS
X-RAY DIFFRACTION
CARBON OXYSULFIDE
CARBON SULFIDES
CATALYTIC EFFECTS
COAL GASIFICATION
CONTROLLED ATMOSPHERES
GAS CHROMATOGRAPHY
HELIUM
HYDROGEN SULFIDES
PRESSURE DEPENDENCE
VOLATILE MATTER
ATMOSPHERES
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHROMATOGRAPHY
COHERENT SCATTERING
CRYOGENIC FLUIDS
DECOMPOSITION
DIFFRACTION
ELEMENTS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
GASES
GASIFICATION
HYDROGEN COMPOUNDS
NONMETALS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
RARE GASES
SCATTERING
SEPARATION PROCESSES
SULFIDES
SULFUR COMPOUNDS
TAR
THERMOCHEMICAL PROCESSES
010404* - Coal
Lignite
& Peat- Gasification
010406 - Coal & Coal Products- Pyrolysis & Cracking- (-1987)
010600 - Coal
Lignite
& Peat- Properties & Composition