Bitumen and Heavy Oil Rheological Properties: Reconciliation with Viscosity Measurements
| Autor: | Michal Fulem, Ala Bazyleva, Mildred Becerra, Md. Anwarul Hasan, John M. Shaw |
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| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | Journal of Chemical & Engineering Data. 55:1389-1397 |
| ISSN: | 1520-5134 0021-9568 |
| DOI: | 10.1021/je900562u |
| Popis: | Complex viscosity and phase-angle measurements for Athabasca bitumen and Maya crude oil were performed with a rotational rheometer using parallel plates and a double gap cylinder in the oscillatory mode over the temperature range of (200 to 410) K. A large range of shearing conditions were applied (frequency of oscillations, shear strain, or stress), and up to three orders of magnitude of variations in measured viscosity values for individual samples at a fixed temperature were obtained. Athabasca bitumen and Maya crude oil were found to be solid-like materials up to (260 to 280) K and (230 to 240) K, respectively. Athabasca bitumen is a non-Newtonian shear-thinning fluid up to (310 to 315) K, whereas Maya crude is a shear-thinning fluid up to (280 to 285) K. Both are Newtonian at higher temperatures. Maya crude oil was also found to possess thixotropic behavior. Athabasca bitumen reveals the thermal irreversibility of complex viscosity, if it is heated above 360 K. These rheological behaviors are attribu... |
| Databáze: | OpenAIRE |
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