Super critical fluid extraction of a crude oil bitumen-derived liquid and bitumen by carbon dioxide and propane

Conference · Tue Jan 01 00:00:00 EST 1991

OSTI ID:5321966

Deo, M D; Hwang, J; Hanson, F V

Supercritical fluid extraction of complex hydrocarbon mixtures is important in separation processes, petroleum upgrading and enhanced oil recovery. In this study, a paraffinic crude oil, a bitumen- derived liquid and bitumen were extracted at several temperatures and pressures with carbon dioxide and propane to assess the effect of the size and type of compounds that makeup the feedstock on the extraction process. It was observed that the pure solvent density at the extraction conditions was not the sole variable governing extraction, and that the proximity of the extraction conditions to the pure solvent critical point affected the extraction yields and the compositions of the extracts. Heavier compounds reported to the extract phase as the extraction time increased at constant temperature and pressure and as the extraction pressure increased at constant temperature and extraction time for both the paraffin crude-propane and the bitumen-propane systems. This preferential extraction was not observed for the bitumen-derived liquid. The non-discriminatory extraction behavior of the bitumen-derived liquid was attributed to its thermal history and to the presence of the olefins and aromatics in the liquid. Phase behavior calculations using the Peng-Robinson equation of state and component lumping procedures provided reasonable agreement between calculated and experimental results for the crude oil and bitumen extractions, but failed in the prediction of the phase compositions for the bitumen-derived liquid extractions.

• Research Organization: Utah Univ., Salt Lake City, UT (United States). Dept. of Fuels Engineering
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FC21-89MC26268
• OSTI ID: 5321966
• Report Number(s): DOE/MC/26268-92/C0011; CONF-911182-10; ON: DE92012546
• Resource Relation: Conference: Eastern oil shale symposium, oil shale, tar sands, heavy oil, Lexington, KY (United States), 13-15 Nov 1991
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
02 PETROLEUM
04 OIL SHALES AND TAR SANDS
ALKANES
SOLVENT EXTRACTION
BITUMENS
PETROLEUM
CARBON DIOXIDE
LIQUIDS
ORGANIC COMPOUNDS
PHASE STUDIES
PROPANE
SUPERCRITICAL STATE
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
ENERGY SOURCES
EXTRACTION
FLUIDS
FOSSIL FUELS
FUELS
HYDROCARBONS
OTHER ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SEPARATION PROCESSES
TAR
400102* - Chemical & Spectral Procedures
020300 - Petroleum- Drilling & Production
020400 - Petroleum- Processing
040400 - Oil Shales & Tar Sands- Oil Production
Recovery
& Refining