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TitleAn NMR (Nuclear Magnetic Resonance) Investigation of the Chemical Association and Molecular Dynamics in Asphalt Ridge Tar Sand Ore and Bitumen
Author(s)Netzel, D. A.; Coover, P. T.
Publication DateSeptember 1987
Report NumberDOE/FE/60177-2452
Unique IdentifierACC0258
Other NumbersLegacy ID: DE88006578; OSTI ID: 5588596
Research OrgWestern Research Institute, Laramie, WY (USA)
Contract NoFC21-83FE60177
Sponsoring OrgUS Department of Energy, Office of Fossil Energy (DOE/FE)
Subject04 Oil Shales and Tar Sands; Benzene; Solvent Properties; Bitumens; Dissolution; Molecular Structure; Nuclear Magnetic Resonance; Carbon Tetrachloride; Chloroform; Pyridine; Bituminous Coal; Equilibrium; Hydrogen 1; Intermolecular Forces; Molecular Weight; Oil Sand Deposits; Oil Shales; Spectroscopy; Spin-lattice Relaxation; Spin-spin Relaxation; Thermal Stresses; Aromatics; Azines; Bituminous Materials; Black Coal; Carbonaceous Materials; Chlorinated Aliphatic Hydrocarbons; Coal; Energy Sources; Fossil Fuels; Fuels; Geologic Deposits; Halogenated Aliphatic Hydrocarbons; Heterocyclic Compounds; Hydrocarbons; Hydrogen Isotopes; Isotopes; Light Nuclei; Magnetic Resonance; Materials; Nuclei; Odd-even Nuclei; Organic Chlorine Compounds; Organic Compounds; Organic Halogen Compounds; Organic Nitrogen Compounds; Other Organic Compounds; Pyridines; Relaxation; Resonance; Stable Isotopes; Stresses; Tar
Related Web PagesNon-medical Uses of Computed Tomography and Nuclear Magnetic Resonance
AbstractPreliminary studies on tar sand bitumen given in this report have shown that the reassociation of tar sand bitumen to its original molecular configuration after thermal stressing is a first-order process requiring nearly a week to establish equilibrium. Studies were also conducted on the dissolution of tar sand bitumen in solvents of varying polarity. At a high-weight fraction of solute to solvent the apparent molecular weight of the bitumen molecules was greater than that of the original bitumen when dissolved in chloroform-d{sub 1} and benzene-d{sub 6}. This increase in the apparent molecular weight may be due to micellar formation or a weak solute-solvent molecular complex. Upon further dilution with any of the solvents studied, the apparent molecular weight of the tar sand bitumen decreased because of reduced van der Waals forces of interaction and/or hydrogen bonding. To define the exact nature of the interactions, it will be necessary to have viscosity measurements of the solutions.
2634 K
25 pp.
 
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