Separation of asphaltenes using high-resolution supercritical-fluid chromatography. Progress report, March 1, 1983-May 31, 1983. [Supercritical fluid chromatography]

Technical Report · Sat Jan 01 04:00:00 EST 1983

OSTI ID:6231937

Jackson, W P; Fjeldsted, J C; Richter, B E; Kong, R C; Kuei, J L; Lee, M L

This project is designed to investigate and develop the techniques and instrumentation necessary to render capillary supercritical fluid chromatography (SFC) a viable high resolution method of analysis. The specific focus of this particular project is the application of SFC to high-molecular-weight coal-derived products, specifically asphaltenes. Recent results with capillary SFC indicate this technique can offer resolution approaching that of capillary GC and still achieve solvation of large compounds, such as the asphaltenes, which are not volatile enough to be analyzed by GC. The scanning fluorescence SFC system was examined more comprehensively to determine its potential in applications to complex separations. The FID/NPD SFC system was applied to several different samples of high molecular weight and/or thermally labile compounds. Several different stationary phases and crosslinking agents were examined for their role in column stability, selectivity, and activity. The examination of static coating of narrow bore columns was pursued. Elevated temperatures and mixed solvents were used to decrease the coating time for columns less than 100 ..mu..m ID. The results of these studies have been submitted for publication. This report is merely a brief summary of the more detailed descriptions in the material submitted for publication.

• Research Organization: Brigham Young Univ., Provo, UT (USA). Dept. of Chemistry
• DOE Contract Number: FG22-81PC40809
• OSTI ID: 6231937
• Report Number(s): DOE/PC/40809-10; ON: DE83013119
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105 -- Separation Procedures
ASPHALTENES
ASPHALTS
BITUMENS
BLOOD VESSELS
BODY
CAPILLARIES
CARDIOVASCULAR SYSTEM
CHEMICAL ANALYSIS
CHROMATOGRAPHY
FLUORESCENCE
LUMINESCENCE
ORGANIC COMPOUNDS
ORGANS
OTHER ORGANIC COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
SENSITIVITY
SEPARATION PROCESSES
TAR