Development of an alternative S. A. R. A. method for the characterization of coal-derived liquids

Conference · Thu Sep 01 04:00:00 EDT 1983 · Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States)

OSTI ID:6578844

Lancas, F M; Karam, H S; McNair, H M

Coal-dervied liquids have been studied extensively, because of their potential applications in many fields such as fuel and feedstocks generation. One of the most popular methods by which to characterize fossil fuels is by fractionation of the sample into saturates, aromatics, resins and asphaltenes (S.A.R.A.). Two different approaches are widely used for this purpose: solvent extraction and liquid chromatography. Although much work has been done using these two approaches, characterization of fossil fuels is still unsatisfactory and exhaustive research is still required. Solvent extraction methods currently used, though simple and inexpensive, present problems with reproducibility, time consumption, solvent evaporation, co-extraction and loss of volatiles. In most of the liquid chromatographic methods used, the fossil fuel extract is first treated with a non-polar hydrocarbon (such as n-pentane) to precipitate the asphaltenes and the remaining solution is applied to an Attapulgus clay column to separate resins from oils. Finally, the oils are fractionated to saturates and aromatics on alumina and/or silica columns. All these steps, in addition to being unnecessary and inconvenient, do not provide the actual group-type distribution in the extract since part of the resins could be co-precipitated with asphaltenes. With these problems in mind, we have developed and applied an alternative S.A.R.A. method for the characterization of Brazilian coal-derived liquids.

• Research Organization: Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
• OSTI ID: 6578844
• Report Number(s): CONF-830814-
• Conference Information: Journal Name: Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States) Journal Volume: 28:5
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
010600 -- Coal
Lignite
& Peat-- Properties & Composition
AROMATICS
ASPHALTENES
ASPHALTS
BITUMENS
BRAZIL
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
CHROMATOGRAPHY
COAL DEPOSITS
COAL LIQUIDS
CONTROL
DEVELOPING COUNTRIES
EXTRACTION
FLUIDS
FRACTIONATION
GEOLOGIC DEPOSITS
LATIN AMERICA
LIQUID COLUMN CHROMATOGRAPHY
LIQUIDS
MINERAL RESOURCES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OTHER ORGANIC COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
POLYMERS
PROCESS CONTROL
RESINS
RESOURCES
SAMPLING
SEPARATION PROCESSES
SOLVENT EXTRACTION
SOUTH AMERICA
TAR