Chemistry and catalysis of coal liquefaction catalytic and thermal upgrading of coal liquid and hydrogenation of CO to produce fuels. Quarterly progress report, July-September 1980
Studies on the basic properties of supported sulfide catalysts showed that different supports have a profound influence on catalytic activities of CoMo catalysts. The three functions of hydrodesulfurization, hydrogenation and cracking were differently affected depending on the support used and the manner of preparation of the catalyst. Also, incorporation of additives to the support showed that the different catalytic functions can be selectively affected. A systematic study concerned with catalytic cracking of coal-derived liquids, viz., an SRC-II middle-heavy distillate and four hydrotreated SRC-II products was carried out in the range of 375 to 500/sup 0/C (LHSV, 0.2 to 3.9 h/sup -1/). Hydrotreatment, even to a limited extent, results in a remarkable improvement in the yield of gasoline-range products from the SRC-II distillate. This improvement is ascribed to: (a) hydrogenolysis reactions leading to lower molecular weight feedstock components and (b) limited hydrogenation of aromatic rings leading to polycyclic feed components with sufficient concentration of hydroaromatic rings needed for effective cracking. The results with model compounds and the data on hydrogen consumption during hydrotreatment of SRC-II liquids indicate that for tricyclic, tetracyclic, and pentacyclic coal-liquid components the optimal concentration of hydroaromatic rings for effective subsequent cracking is at least two rings per molecule.
- Research Organization:
- Utah Univ., Salt Lake City (USA). Dept. of Mining and Fuels Engineering
- DOE Contract Number:
- AC22-79ET14700
- OSTI ID:
- 6786670
- Report Number(s):
- DOE/ET/14700-4
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CATALYSTS
DEACTIVATION
COAL
PYROLYSIS
COAL LIQUEFACTION
COAL LIQUIDS
CATALYTIC CRACKING
HYDROGENATION
ZINC CHLORIDES
CATALYTIC EFFECTS
CARBON MONOXIDE
CARBONACEOUS MATERIALS
DESULFURIZATION
EXPERIMENTAL DATA
HEAT TRANSFER
MASS TRANSFER
NITROGEN
NUCLEAR MAGNETIC RESONANCE
OXYGEN
REFINING
REMOVAL
STRUCTURAL MODELS
SUSPENSIONS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
CRACKING
DATA
DECOMPOSITION
DISPERSIONS
ELEMENTS
ENERGY SOURCES
ENERGY TRANSFER
FLUIDS
FOSSIL FUELS
FUELS
HALIDES
HALOGEN COMPOUNDS
INFORMATION
LIQUEFACTION
LIQUIDS
MAGNETIC RESONANCE
MATERIALS
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PROCESSING
RESONANCE
THERMOCHEMICAL PROCESSES
ZINC COMPOUNDS
ZINC HALIDES
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction