Effect of nitrogen content of solvent on coal liquefaction
SRC-II recycle solvents contain substantial amounts of heterocyclic compounds such as quinoline; hydrogenated derivatives of such compounds can be good H-donors. In addition, hydrogenation of quinoline to tetrahydroquinoline is faster than that of the corresponding homocyclic aromatic compound such as naphthalene. Hence, such compounds should aid in maintaining the H-donor capability of recycle solvents at high levels during all phases of coal conversion. In a series of coal liquefaction runs made to test this premise, there was no effect of tetrahydroquinoline addition to hydrogenated phenanthrene and SRC-II solvent on the product distribution from coal liquefaction. However, there was a very pronounced effect with anthracene oil as solvent. Adduction of tetrahydroquinoline led to a net loss of solvent and a very high yield of asphaltenes. These results indicate the formation of adducts through the reactions of solvent and coal species. The level of adduction lessened with extended reaction times, indicating some reversibility.
- Research Organization:
- Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania
- OSTI ID:
- 6578950
- Journal Information:
- Ind. Eng. Chem. Fundam.; (United States), Journal Name: Ind. Eng. Chem. Fundam.; (United States) Vol. 23:2; ISSN IECFA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
ADDUCTS
ANTHRACENE
AROMATICS
ASPHALTENES
ASPHALTS
AZAARENES
AZINES
BITUMENS
CARBONACEOUS MATERIALS
CATALYTIC EFFECTS
CHEMICAL REACTIONS
COAL
COAL LIQUEFACTION
CONDENSED AROMATICS
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
HYDROGEN TRANSFER
HYDROGENATION
LIQUEFACTION
MATERIALS
NAPHTHALENE
NITROGEN
NONMETALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SOLVENTS
OTHER ORGANIC COMPOUNDS
PHENANTHRENE
PYRIDINES
QUINOLINES
RECYCLING
SOLVENTS
SRC-II PROCESS
TAR
THERMOCHEMICAL PROCESSES