Coal pretreatment for two stage liquefaction. Quarterly report, October 1-December 31, 1985
The pattern of liberation from ball mill grinding is being studied by analysis of the product composition from grinding an 8 x 12 subbituminous coal feed. Construction of the autoclave reactor system is in the final stages. It is now anticipated that the system will be fully operational by the end of February. Analyses of the liquefaction residues from earlier reported temperature-staged liquefaction experiments, in which naphthalene was used as the solvent, have been made by Dr. Alan Davis. The results confirm that the temperature-staged catalytic reaction sequence produced conditions most conducive to coal hydrogenation and liquefaction. The analysis has also proved valuable in providing insight into the catalyzed liquefaction process, including a strong indication that the first stage temperature was too high for efficient conversion of the lower rank coal. Further tubing bomb experiments have been conducted to investigate the influence of solvent composition on the temperature-staged catalytic liquefaction of a bituminous and a subbituminous coal. The solvents were a 650 to 850F distillate fraction and a 1:1 mixture of this fraction with the 850+F fraction from the Lummus ITSL process, when operating with Wyodak coal. The 650 to 850F solvent was found to be unsatisfactory with both coals and produced particularly poor results with the bituminous coal. The solvent mixture gave improved performance with both coals due, it is believed, to the presence of the high boiling components in the 850+F fraction. These investigations are being continued. 7 refs.
- Research Organization:
- Pennsylvania State Univ., University Park (USA). Coll. of Earth and Mineral Sciences
- DOE Contract Number:
- FG22-84PC70003
- OSTI ID:
- 6274482
- Report Number(s):
- DOE/PC/70003-T7; ON: DE86005989
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
013000 -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
AUTOCLAVES
BITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
CATALYSTS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHEMICAL REACTORS
COAL
COAL LIQUEFACTION
COAL PREPARATION
COMMINUTION
DATA
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FUELS
GRINDING
HIGH TEMPERATURE
HYDROGENATION
INFORMATION
LIQUEFACTION
MACERALS
MACHINING
MATERIALS
NUMERICAL DATA
ORGANIC SOLVENTS
PETROGRAPHY
RECYCLING
RESEARCH PROGRAMS
RESIDUES
SOLVENTS
SUBBITUMINOUS COAL
THERMOCHEMICAL PROCESSES
TSL PROCESS
YIELDS