Gas chromatographic techniques for the analysis of hydrocarbons in low-rank coal liquefaction products. Part I. Treatment of the data
The project that provided the impetus for this research involved the conversion of coal into refinable oils. The goals of the project were two-fold. First was to study the effects of two very different start-up solvents on the composition of the coal liquefaction product at line-out. Second was to characterize the changes that occurred during the line-out process. A major effort was on the analysis of the hydrocarbons oils by capillary gas chromatography. The distillate oil samples were first separated by silica gel column chromatography into 11 fractions to simplify the complex mixtures. Fractions were combined into four groups so that similar polarities resulted: (1) alkanes; (2) light aromatics; (3) di, tri, and tetra aromatics; and (4) heavy aromatics. Calibration standards, containing up to 30 standard compounds, were prepared and diluted to several different concentrations. An aliquot of the appropriate internal standard was added to each calibration standard as well as to the diluted column fractions. Because the relative response of the internal standard may vary at different concentrations, it was important that the same amount be added every time. To calibrate the GC, the calibration standard dilutions were each injected twice and run with the same temperature program as the samples to be analyzed. There are some limitations to this technique which are linked. 3 references, 1 figure.
- Research Organization:
- North Dakota Univ., Grand Forks (USA). Energy Research Center
- DOE Contract Number:
- FC21-83FE60181
- OSTI ID:
- 5371756
- Report Number(s):
- DOE/FE/60181-63; CONF-8404105-3; ON: DE84006381
- Resource Relation:
- Conference: North Dakota Academy of Science conference, Fargo, ND, USA, 26 Apr 1984
- Country of Publication:
- United States
- Language:
- English
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Gas chromatographic techniques for the analysis of hydrocarbons in low-rank coal liquefaction products. Part II. Instrumental aspects
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
COAL LIQUEFACTION
ORGANIC SOLVENTS
PROCESS DEVELOPMENT UNITS
COAL LIQUIDS
CHROMATOGRAPHY
GAS CHROMATOGRAPHY
CALIBRATION
COMPARATIVE EVALUATIONS
COAL RANK
FRACTIONATION
FLUIDS
FUNCTIONAL MODELS
LIQUEFACTION
LIQUIDS
SEPARATION PROCESSES
SOLVENTS
THERMOCHEMICAL PROCESSES
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction
400105 - Separation Procedures