Rate of intermolecular association of Asphalt Ridge tar sand bitumen after thermal dissociation

It is known that reversible thermal cycling implies that intermolecular interactions of the types dipole-dipole or dipole-induced dipole, rather than a chemical reaction, are responsible for the exothermic reactions in complex organic mixtures. A preliminary study was conducted to determine if the r...

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Bibliographic Details
Published in:	Energy & fuels Vol. 3; no. 2; pp. 259 - 262
Main Authors:	Netzel, Daniel A, Coover, Peggy T
Format:	Journal Article
Language:	English
Published:	Washington, DC American Chemical Society 01-03-1989
Subjects:	04 OIL SHALES AND TAR SANDS 040401 - Oil Shales & Tar Sands- In Situ Methods, True & Modified 040402 - Oil Shales & Tar Sands- Surface Methods 040500 - Oil Shales & Tar Sands- Properties & Composition Applied sciences ASPHALT RIDGE DEPOSIT BITUMENS CONFIGURATION INTERACTION DATA DISSOCIATION Energy EQUILIBRIUM Exact sciences and technology EXPERIMENTAL DATA Fuel processing. Carbochemistry and petrochemistry Fuels GEOLOGIC DEPOSITS INFORMATION KINETICS MAGNETIC RESONANCE MEDIUM TEMPERATURE MOLECULES NMR SPECTRA NUCLEAR MAGNETIC RESONANCE NUMERICAL DATA OIL SAND DEPOSITS ORGANIC COMPOUNDS OTHER ORGANIC COMPOUNDS RESONANCE SPECTRA TAR Intermolecular interaction Tar Spin lattice relaxation Kinetics Nuclear magnetic resonance Bitumen Tar sand
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Summary:	It is known that reversible thermal cycling implies that intermolecular interactions of the types dipole-dipole or dipole-induced dipole, rather than a chemical reaction, are responsible for the exothermic reactions in complex organic mixtures. A preliminary study was conducted to determine if the reversible intermolecular interactions of Asphalt Ridge tar sand bitumen could be followed by using nuclear magnetic resonance relaxation spectroscopy. The NMR data indicate that the intermolecular association of molecules in the bitumen to their original molecular configuration after thermal dissociation is mechanistically a pseudo-first-order process requiring nearly a week to establish an intermolecular-interaction equilibrium. The first-order rate constant was found to be 0.0139 h{sup {minus}1} at a mean temperature of 32{degree}C.
Bibliography:	ark:/67375/TPS-65MVC49B-B istex:336815196153880CE90EBB7F2652C345BD434A89
ISSN:	0887-0624 1520-5029
DOI:	10.1021/ef00014a023