Hydrogen bonding in asphaltenes and coal. Quarterly report for April 1, 1979--June 30, 1979

Technical Report · Mon Jul 16 00:00:00 EDT 1979

DOI:https://doi.org/10.2172/6090268· OSTI ID:6090268

Li, N. C.; Tewari, K. C.; Hara, T.

Structural analyses are reported of upgraded coal-liquids derived from catalytic hydroprocessing of a 30 to 70 blend SRC I with SRC II in a trickle bed reactor under different process conditions. The results indicate that along with the decrease in toluene insolubles, heteroatom (O,N,S) content, aromatic content and corresponding increase in aliphatic content, the hydrogen-bonded structure and phenolic OH content of the coal-liquid drastically decrease with increase in contact time and temperature. The specific gravity, aromaticity, and atomic C/H ratio of the upgraded liquids decrease linearly with the conversion of pentane-insolubles (TI + A) into pentane-soluble oil (HO). Increase in temperature from 672/sup 0/K to 694/sup 0/K, under present hydroprocessing conditions, accelerates thermal hydrocracking and increases the conversion of pentane-insolubles, with a marked decrease in specific gravity, viscosity, heteroatom content, and atomic C/H ratio of the upgraded liquid. Hydroprocessing conditions greatly influence the properties of asphaltene fractions.

• Research Organization: Duquesne Univ., Pittsburgh, PA (USA). Dept. of Chemistry
• OSTI ID: 6090268
• Report Number(s): COO-0063-14
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
010600 -- Coal
Lignite
& Peat-- Properties & Composition
AROMATICS
ASPHALTENES
ASPHALTS
BITUMENS
CHEMICAL BONDS
CHEMICAL REACTIONS
COAL LIQUEFACTION
COAL LIQUIDS
CRACKING
DECOMPOSITION
HETEROCYCLIC COMPOUNDS
HYDROGENATION
LIQUEFACTION
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PROCESSING
PYROLYSIS
REFINING
SRC PROCESS
SRC-II PROCESS
STRUCTURAL CHEMICAL ANALYSIS
TAR
THERMAL CRACKING
THERMOCHEMICAL PROCESSES