High Temperature Density, Viscosity, and Interfacial Tension Measurements of Bitumen鈥揚entane鈥揃iodiesel and Process Water Mixtures

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• 作者：Francisco J. Arg眉elles-Vivas ; Tayfun Babadagli ; Laureen Little ; Nikolas Romaniuk ; Baki Ozum
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2012
• 出版时间：October 11, 2012
• 年：2012
• 卷：57
• 期：10
• 页码：2878-2889
• 全文大小：669K
• 年卷期：v.57,no.10(October 11, 2012)
• ISSN：1520-5134

文摘

As an alternative to solvent addition to the steam-assisted gravity drainage process for bitumen recovery, coinjection of biodiesel with steam as a surfactant additive to reduce bitumen鈥搘ater interfacial tension was considered. The density and viscosity of bitumen and bitumen鈥損entane mixtures up to 15 % pentane concentrations by mass were measured at a 1 MPa pressure and up to 448 K temperature. The interfacial tension between bitumen, bitumen鈥損entane mixtures up to 15 % pentane concentrations, bitumen鈥揵iodiesel mixtures up to 0.3 % and water, and process water was also measured at a 1 MPa pressure and up to 423 K temperature. Laboratory tests showed that the density of bitumen鈥損entane mixtures decreased linearly with an increase in pentane content, and their viscosity decreased exponentially with the increase in temperature. A decrease in bitumen viscosity with an increase in pentane content was dramatic at low temperatures and became less sensitive at temperatures above 373 K. Interfacial tension measurements suggest that asphaltic acids naturally occurring in bitumen act as surfactants. The decay in interfacial tension with time is attributed to the diffusion of surfactant species in a bitumen droplet. The increase in interfacial tension of bitumen鈥損entane mixtures and water with an increase in pentane content and temperature needs further attention because of its commercial application.