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- W4323655399 abstract "Abstract The overall objective of this study was to perform a series of diffusion experiments between liquid hydrocarbons (e.g., propane, pentane, and toluene) and bitumen or heavy oil to observe and analyze mass transfer in the systems. Some difficulties, such as the complex behavior of the phases, the high viscosity, and the opacity of hydrocarbons, generate the need for different techniques to measure mass transfer coefficients in heavy crude oils. In this work, X-ray tomography was used for such measurements. The measurements are carried out in environments where the sedimentation of solids is encouraged. To achieve this, a novel setup was designed and assembled to measure the mass transfer in these systems based on the density profiles established over time in aluminum containers that contain fluids. The containers were regularly scanned to track the behavior of the density profiles over time. The data was collected and analyzed, obtaining interesting results, which will be important as a starting point for future research related to systems that integrate interactions between solvents and oils in the recovery processes. Due to the novel results obtained in the original test, 7 sets of experiments were carried out, all with unique characteristics, trying to analyze its results in detail. One of the objectives is to analyze if the mass transfer is uniform and constant during long periods. This work shows results that were never published in the previous literature, such as partial miscibility when mixing n-propane and bitumen, oil swelling, oil shrinking, asphaltene precipitation and sedimentation, total miscibility, and the effect of adding pure asphaltenes and calcium carbonate to the mixture, among others. In addition, the impacts on the effectiveness of the proposed processes for the production and refining of these solvents are discussed." @default.
- W4323655399 created "2023-03-10" @default.
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- W4323655399 date "2023-03-10" @default.
- W4323655399 modified "2023-09-26" @default.
- W4323655399 title "Complex Mass Transfer Phenomena in Bitumen Solvent Systems" @default.
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- W4323655399 doi "https://doi.org/10.2118/212778-ms" @default.
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