Coal pretreatment for two stage liquefaction. Quarterly report, April 1-June 30, 1986
Efforts have been continued to examine the utility of liquid-liquid separation for the pretreatment of subbituminous coals. Reasonable separations have been obtained in terms of yield, the enrichment of reactive macerals and the rejection of mineral matter when using a coal-derived distillate as the nonaqueous medium. An investigation of the influence of reaction conditions on temperature-staged catalytic liquefaction has been continued using tubing bomb reactors. With fixed second stage conditions (425/sup 0/C, 10 min), a survey has indicated that, for a subbituminous coal, first stage reaction at 275/sup 0/C and 30 min gives good overall conversion and a high-oil to asphaltene ratio. Using these conditions for the first stage, a survey has now been started to examine the influence of the second stage conditions on the net product distribution. Preliminary results show that higher oil yields are obtained at 450 than at 425/sup 0/C without incurring excessive production of light hydrocarbon gases. Some studies have been made to examine the effect of catalyst concentration on temperature-staged liquefaction. Reducing the Mo concentration from 1.0 to 0.1% wt lowered the overall conversion by 7% and the oil yield by about 4%. The influence of solvent composition upon temperature-staged liquefaction has been studied using six distillate solvents supplied by Conoco Coal Research. Reactions were conducted in the 300 cc stirred autoclave using both subbituminous and bituminous coals. Preliminary data are presented and discussed. 5 refs., 2 figs., 8 tabs.
- Research Organization:
- Pennsylvania State Univ., University Park (USA). Coll. of Earth and Mineral Sciences
- DOE Contract Number:
- FG22-84PC70003
- OSTI ID:
- 5402124
- Report Number(s):
- DOE/PC/70003-T10; ON: DE86014031
- Country of Publication:
- United States
- Language:
- English
Similar Records
Coal pretreatment for two-stage liquefaction: Final report: Part 2, Temperature-staged coal liquefaction
Coal pretreatment for two stage liquefaction. Quarterly report, January 1, 1985-March 31, 1985
Related Subjects
010405 -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
010600 -- Coal
Lignite
& Peat-- Properties & Composition
013000* -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
AUTOCLAVES
BITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL COMPOSITION
COAL
COAL LIQUEFACTION
COMMINUTION
DATA
DEASHING
ELEMENTS
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FUELS
GRINDING
HIGH TEMPERATURE
INFORMATION
LIQUEFACTION
MACERALS
MACHINING
MATERIALS
MEDIUM PRESSURE
METALS
MOLYBDENUM
NUMERICAL DATA
ORGANIC SOLVENTS
PETROGRAPHY
RECYCLING
RESEARCH PROGRAMS
SEPARATION PROCESSES
SOLVENTS
SUBBITUMINOUS COAL
THERMOCHEMICAL PROCESSES
TIME DEPENDENCE
TRANSITION ELEMENTS
TSL PROCESS
YIELDS