Rheology and stability of SRC residual fuel oils - storage evaluation. SRC-1 quarterly technical report, October-December 1982. Supplement
In Air Products ongoing study to characterize the rheology and stability of various SRC residual oils, single-phase blends of 50 wt % HSRC and TSL SRC in 1:1 mixtures of 1st- and 2nd-stage process solvents were subjected to storage stability tests at 150/sup 0/F in nitrogen and air atmospheres. Using viscosity as an indicator, it was observed that the blends studied increased in viscosity with storage time in an air atmosphere; the viscosity increase began after a 4-week storage period. The increase in HSRC blend viscosity was significantly greater than that of the TSL SRC blend. A 60-day air-stored blend will require a pumping temperature about 10/sup 0/F higher than that specified for an unaged blend in order to have the same viscosity. The viscosity increase under nitrogen storage was relatively insignificant. Nitrogen blanketing appears to be important in maintaining the specified viscosity characteristics of the blends during storage in the 150/sup 0/F storage condition tested. A loss of volatiles undoubtedly occurs during high-temperature storage under laboratory conditions. Such losses contribute to an increase in the viscosity of the blend. In commercial practice, volatile losses are expected to be significantly lower. Solvent extraction data and analysis of separated fractions suggest that during storage under the above conditions, some oxidative polymerization of pentane-soluble oil components forms higher molecular weight pentane insolubles (asphaltenes and benzene insolubles). Asphaltenes are also involved in the increase in viscosity and do chemically change. 1 reference, 8 figures, 27 tables.
- Research Organization:
- International Coal Refining Co., Allentown, PA (USA)
- DOE Contract Number:
- AC05-78OR03054
- OSTI ID:
- 6808857
- Report Number(s):
- DOE/OR/03054-11-Suppl.; ON: DE84015101
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
ATMOSPHERES
BOILING POINTS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHROMATOGRAPHY
COAL LIQUEFACTION
COAL LIQUIDS
CONTROLLED ATMOSPHERES
DATA
DISPERSIONS
EVAPORATION
EXPERIMENTAL DATA
EXTRACTION
FLUIDS
FRACTIONATION
FUELS
GAS CHROMATOGRAPHY
INFORMATION
LIQUEFACTION
LIQUIDS
MIXTURES
NUMERICAL DATA
OXIDATION
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
POLYMERIZATION
RHEOLOGY
SEPARATION PROCESSES
SOLVENT EXTRACTION
SOLVENT-REFINED COAL
SRC PROCESS
STABILITY
STORAGE
TEMPERATURE DEPENDENCE
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
TIME DEPENDENCE
TRANSITION TEMPERATURE
VISCOSITY