Journal
ENERGY & FUELS
Volume 36, Issue 16, Pages 8809-8817Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.energyfuels.2c00836
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Funding
- NSERC
- Alberta Innovates
- ConocoPhillips Canada
- Suncor Energy Ltd.
- CNRL
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SARA assays are unreliable with variations above 5 wt % reported for assays performed in different laboratories. This study develops an approach to predict the saturate composition of crude oil based on more reliable data such as simulated distillation assay, asphaltene content, and oil density, offering a more standardized determination of the SARA composition.
SARA (saturate, aromatic, resins, and asphaltenes) assays are used in the assessment of crude oil stability, in oil characterization for asphaltene precipitation modeling, and in lumped kinetic models for oil upgrading. However, SARA assays are notoriously unreliable with deviations above 5 wt % reported for assays on the same oil performed in different laboratories. In this study, an approach is developed to predict the saturate composition of a crude oil from more reliable and readily available data such as a simulated distillation (SimDist) assay, the asphaltene content of the oil, and the oil density. If the ratio of the aromatic content to the aromatic+resin content for the SARA method of interest is known, the complete SARA composition can be determined. The proposed method is based on more reliable measurements than the SARA assay and therefore offers a means to a more standardized determination of the SARA composition.
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