The interaction of Ni(II) complexes with oil-sand asphaltenes

Conference · Tue Apr 01 04:00:00 EST 1986 · Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States)

OSTI ID:5473285

Nguyen, S; Filby, R H

The nature of Ni(II) non-porphyrin species in oil sand asphaltenes has not been unequivocally determined. The interaction of Ni(II) complexes with asphaltenes may suggest a mechanism for the incorporation of Ni(II) in the asphaltenes. The reactions of NI-63 and C-14 labelled Ni(acac)/sub 2/ with asphaltenes in chloroform solution suggest that the adsorption/reaction of Ni(II) by asphaltenes is due to a combination of ligand exchange with asphaltene functional groups and the association of the Ni(acac)/sub 2/ complex with the asphaltenes through hydrogen or ..pi.. bonding. The Ni(II) uptake by asphaltenes in chloroform is partially reversible, and the uptake data fits a pseudo-Freundlich adsorption isotherm. No saturation Ni(II) content was observed up to 10,000 ..mu..g Ni/g asphaltenes. Gel permeation chromatography of the asphaltenes before and after the reaction with Ni(acac)/sub 2/ demonstrate that the adsorbed Ni(II) is distributed among MW fractions in a similar fashion to the inherent nickel of the asphaltenes. The adsorbed Ni(II) is concentrated in the highest molecular weight fraction. Under the same reaction conditions using Cu(acac)/sub 2/, Cu(II) was adsorbed by the asphaltenes to a smaller extent than Ni(II).

• Research Organization: Nuclear Radiation Center and Dept. of Chemistry, Washington State Univ., Pullman, WA 99164-1300
• OSTI ID: 5473285
• Report Number(s): CONF-860425-
• Conference Information: Journal Name: Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States) Journal Volume: 31:2
• Country of Publication: United States
• Language: English

Related Subjects

04 OIL SHALES AND TAR SANDS
040500* -- Oil Shales & Tar Sands-- Properties & Composition
ADSORPTION
ASPHALTENES
ASPHALTS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BITUMENS
BITUMINOUS MATERIALS
CARBON 14 COMPOUNDS
CARBONACEOUS MATERIALS
CHEMICAL REACTION KINETICS
CHROMATOGRAPHY
COMPLEXES
COPPER COMPLEXES
ENERGY SOURCES
EVEN-ODD NUCLEI
FOSSIL FUELS
FUELS
GEL PERMEATION CHROMATOGRAPHY
INTERMEDIATE MASS NUCLEI
ISOTHERMS
ISOTOPE APPLICATIONS
ISOTOPES
KINETICS
LABELLED COMPOUNDS
LIGANDS
MATERIALS
MOLECULAR WEIGHT
NICKEL 63
NICKEL COMPLEXES
NICKEL ISOTOPES
NUCLEI
OIL SANDS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
RADIOISOTOPES
REACTION KINETICS
SEPARATION PROCESSES
SORPTION
TAR
TRACER TECHNIQUES
TRANSITION ELEMENT COMPLEXES
YEARS LIVING RADIOISOTOPES