Catalytic hydrocracking of tar vapours in hydropyrolysis
Tar vapours have been hydrotreated in the second stage of a fixed-bed two-stage hydropyrolysis reactor using hydrous titanium oxide catalysts exchanged with Ni, Co, Mo and Pd and a commercially available Ni/Mo on alumina catalyst. The primary tar, which accounted for 25 to 30% daf coal (UK bituminous, 82% dmmf C) was converted at 400/sup 0/C and 150 bar to a colourless liquid low in heteroatoms of which up to 40% boiled below 150/sup 0/C. The gas yield was only slightly higher than that obtained in corresponding single-stage tests. A lower boiling product was obtained with Ni/Co/Mo hydrous titanium oxide than with the commercial Ni/Mo catalyst. The most extensively hydrogenated product was obtained with Pd which was still effective at 300/sup 0/C and 50 bar. The initial effects of carbon build-up on product composition are similar for the alumina- and hydrous titanium oxide-Ni/Mo catalysts tested. 13 refs., 4 figs., 6 tabs.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA); Coal Research Establishment, Cheltenham (UK)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 7189053
- Report Number(s):
- SAND-86-2279C; CONF-870410-12; ON: DE87003510
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
010409 -- Coal
Lignite
& Peat-- Pyrolysis & Carbonization-- (1987-)
BITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMICAL REACTORS
CHROMATOGRAPHY
COAL
COAL TAR
COBALT
COMPARATIVE EVALUATIONS
CRACKING
DATA
DECOMPOSITION
ELEMENTS
ENERGY SOURCES
EXPERIMENTAL DATA
FLUIDS
FOSSIL FUELS
FUELS
GAS CHROMATOGRAPHY
GASES
HIGH PRESSURE
HIGH TEMPERATURE
HYDROCRACKING
HYDROGENATION
INFORMATION
MATERIALS
METALS
MOLYBDENUM
NICKEL
NUMERICAL DATA
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PALLADIUM
PLATINUM METALS
PYROLYSIS
SEPARATION PROCESSES
TAR
THERMOCHEMICAL PROCESSES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
VAPORS