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Publication . Article . 2017

Partial Upgrading of Bitumen: Impact of Solvent Deasphalting and Visbreaking Sequence

Ashley Zachariah; Arno de Klerk;
Open Access
Published: 24 Aug 2017 Journal: Energy & Fuels, volume 31, pages 9,374-9,380 (issn: 0887-0624, eissn: 1520-5029, Copyright policy )
Publisher: American Chemical Society (ACS)

Solvent deasphalting and visbreaking are two important technologies in the development of processes for partial upgrading of oilsands-derived bitumen to improve oil fluidity for pipeline transport. This work investigated the impact of the process sequence, solvent deasphalting followed by visbreaking (SDA-Vis) compared to visbreaking followed by solvent deasphalting (Vis-SDA). Thermal conversion during visbreaking was performed at 380 °C for 85 min, and solvent deasphalting was performed with n-pentane. Using this combination of processes in either sequence changed bitumen from a viscosity-limited fluid to a density-limited fluid with respect to pipeline specifications. The density and viscosity of the oil products from SDA-Vis and Vis-SDA were comparable. It was found that SDA-Vis achieved 2 wt % higher liquid yield than Vis-SDA. Conversely, Vis-SDA produced an oil product with higher hydrogen to carbon ratio compared to SDA-Vis. This difference could be explained in terms of hydrogen transfer during the...

Subjects by Vocabulary

Microsoft Academic Graph classification: Yield (chemistry) Carbon chemistry.chemical_element chemistry Hydrogen Organic chemistry Viscosity Chemical engineering Visbreaker Pipeline transport Solvent Asphalt


Energy Engineering and Power Technology, Fuel Technology, General Chemical Engineering

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