Hydrogen bonding in asphaltenes and coal liquids. Quarterly report, November 1, 1980-January 31, 1981
The aging characteristics of 30/70 (wt. %) blend of SRC I and SRC II and of a SRC II Middle Distillate (boiling point range 450 to 565/sup 0/K), have been studied. Viscometric, electron spin resonance, ultimate analysis, solvent separations, gel permeation chromatography, and 600-MHz measurements have been used to monitor the aging properties of the SRC liquids under various conditions. The viscosity of the blend increases significantly in ten days with oxygen bubbling at 335/sup 0/K. However, copper, in addition to oxygen, is necessary to significantly change the viscosity of the Middle Distillate. For the blend, there is a linear increase in the logarithm of viscosity with increasing wt. % of toluene-insolubles formed during oxygen-aging. There is also a linear decrease in the logarithm of viscosity with decreasing content of toluene-insolubles resulting from hydroprocessing of the blend with Ni-Mo catalyst. These observations indicate that under conditions of oxidative degradation the formation and content of larger molecular-size toluene-insolubles are mainly responsible for the increased viscosity of the blend. The middle distillate does not contain toluene-insolubles, and oxygen-aging occurs only in the presence of copper. Oxidative coupling of phenols is proposed as an aging mechanism for both the blend and the middle distillate.
- Research Organization:
- Duquesne Univ., Pittsburgh, PA (USA). Dept. of Chemistry
- DOE Contract Number:
- AC22-80PC30252
- OSTI ID:
- 6672474
- Report Number(s):
- DOE/PC/30252-T2
- Country of Publication:
- United States
- Language:
- English
Similar Records
Hydrogen bonding in asphaltenes and coal liquids. Quarterly report, August 1, 1981-October 31, 1981
Hydrogen bonding in asphaltenes and coal liquids. Quarterly report, February 1-April 30, 1982
Related Subjects
ASPHALTENES
ION EXCHANGE CHROMATOGRAPHY
SOLVENT EXTRACTION
VISCOSITY
COAL LIQUIDS
AGING
CHEMICAL BONDS
COPPER
MEDIUM TEMPERATURE
MIXTURES
MOLYBDENUM
NICKEL
PENTANE
PHENOLS
SRC PROCESS
SRC-II PROCESS
TOLUENE
ALKANES
AROMATICS
ASPHALTS
BITUMENS
CHROMATOGRAPHY
COAL LIQUEFACTION
DISPERSIONS
ELEMENTS
EXTRACTION
FLUIDS
HYDROCARBONS
HYDROXY COMPOUNDS
LIQUEFACTION
LIQUIDS
METALS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
REFRACTORY METALS
SEPARATION PROCESSES
TAR
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction
010600 - Coal
Lignite
& Peat- Properties & Composition