Catalytic liquefaction of coal using supercritical water-solvent mixtures. Final report
This report describes studies of the kinetics of the catalytic reaction between CO and water, and its utilization in the liquefaction of coal in the presence of organic solvents. The kinetic of the water gas shift reaction was found to be first order in all the catalysts studied. The activity of the catalysts decreased in the following order: cobalt molybdenum sulfides; cobalt molybdenum oxide; iron salts. The presence of toluene, tetralin and THQ decreased the CO conversion with cobalt molybdenum catalysts but increased the CO conversion with iron catalysts. Moderate coal conversions to toluene soluble products (25 to 35%) were obtained in the presence of supercritical water and water/CO mixtures. However, addition of organic solvents to water/CO increased the toluene conversion to 70 to 80% for THQ, to 50 to 50% for tetralin and only to 35 to 40% for toluene. Addition of H/sub 2/S to the solvent/water/CO medium increased the conversion even further. The presence of catalysts had only a minor effect in coal conversion and were not required to achieve high conversions. The optimum operating conditions for an Illinois No. 6 coal were obtained using a THQ/water/CO/H/sub 2/S medium at 3600 psi, and 400/sup 0/C. Higher conversions were attained with a subbituminous Wyodak coal. These studies clearly demonstrate that high conversion of coal to toluene soluble products can be attained in a water/CO solvent medium. 44 refs., 18 figs., 8 tabs.
- Research Organization:
- Notre Dame Univ., IN (USA). Dept. of Chemical Engineering
- OSTI ID:
- 6378309
- Report Number(s):
- EPRI-AP-4359; ON: TI86920102
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effects of low-temperature catalytic pretreatments on coal structure and reactivity in liquefaction. [Quarterly] technical progress report, April--June 1993
Promoting coal hydroliquefaction through co-use of water and dispersed molybdenum sulfide catalyst
Related Subjects
COAL LIQUEFACTION
BENCH-SCALE EXPERIMENTS
CATALYSTS
ORGANIC SOLVENTS
ACETATES
CARBON MONOXIDE
CHEMICAL REACTION KINETICS
COBALT OXIDES
COBALT SULFIDES
COMPARATIVE EVALUATIONS
EXPERIMENTAL DATA
EXTRACTION
HIGH PRESSURE
HIGH TEMPERATURE
HYDROGEN SULFIDES
IRON COMPOUNDS
IRON SULFATES
MOLYBDENUM OXIDES
MOLYBDENUM SULFIDES
QUINOLINES
SHIFT PROCESSES
TETRALIN
TOLUENE
WATER
WATER GAS PROCESSES
ALKYLATED AROMATICS
AROMATICS
AZAARENES
AZINES
CARBON COMPOUNDS
CARBON OXIDES
CARBOXYLIC ACID SALTS
CHALCOGENIDES
CHEMICAL REACTIONS
COBALT COMPOUNDS
DATA
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
HYDROGEN COMPOUNDS
INFORMATION
KINETICS
LIQUEFACTION
MOLYBDENUM COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PYRIDINES
REACTION KINETICS
REFRACTORY METAL COMPOUNDS
SEPARATION PROCESSES
SOLVENTS
SULFATES
SULFIDES
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction