Separation of coal-derived liquids by gel permeation chromatography

Conference · Mon Jan 01 04:00:00 EST 1979 · Am. Chem. Soc., Div. Fuel Chem., Prepr.; (United States)

OSTI ID:5235628

Philip, C V; Anthony, R G

Characterization and estimation of components in coal derived products are always time consuming and complex due to the number of various constituents present in them. Most of the people working in this area try to separate coal derived mixtures into four or five fractions and each fraction is enriched with chemically similar species. The fractionation is achieved by either using the difference in the solubility of various components in solvents with different chemical affinities or using absorption chromatography, mainly silica gel columns or various ion exchange and ionpair columns. The latter achieves a cleaner separation than the former. The major disadvantage of both techniques is the loss of material balance at the end of the separation and the time consuming steps involved. This paper discusses the use of gel permeation chromatography followed by high resolution gas chromatography-mass spectrometry for the separation and characterization of coal derived liquids. Gel Permeation Chromatography uses columns packed with swelled polymer particles with controlled pore size, formed by the copolymerization of styrene and divinlybenzene GPC separates molecules according to molecular size based upon a distribution between a stationary phase of controlled pore size distribution and mobile liquid phase. Larger molecules elute faster than smaller molecules since larger molecules are less probable to diffuse into the liquid trapped inside the pore. Selecting the columns with proper pore size which varies from 100A to 10/sup 6/A, the technique can be used to separate molecules over a wide range of molecular size, several million to less than 100 molecular weight.

• Research Organization: Texas A and M Univ., College Station
• OSTI ID: 5235628
• Report Number(s): CONF-790917-P3
• Conference Information: Journal Name: Am. Chem. Soc., Div. Fuel Chem., Prepr.; (United States) Journal Volume: 24:3
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
CHROMATOGRAPHY
COAL LIQUEFACTION
COAL LIQUIDS
DATA
DATA FORMS
EXPERIMENTAL DATA
FRACTIONATION
INFORMATION
LIQUEFACTION
MASS SPECTROSCOPY
NUMERICAL DATA
SEPARATION PROCESSES
SPECTROSCOPY
TABLES
THERMOCHEMICAL PROCESSES