Physical Properties and Extraction Measurements for the Athabasca Bitumen + Light Hydrocarbon System: Evaluation of the Pressure Effect, Solvent-to-Bitumen Ratio, and Solvent Type
Bibliographic record
Abstract
Phase behavior study and solvent-saturated phase properties are of crucial importance for heavy oil in situ recovery methods as well as pipeline transportation, surface upgrading, and refining. In this study, the extraction of light components and liquid–liquid equilibrium (LLE) for Athabasca bitumen/ethane systems were studied at ambient temperature over a wide range of pressure. The impact of the ethane-to-bitumen ratio on the physical properties of the saturated phases as well as the partitioning of solvent in each liquid phase was evaluated. The experiments were conducted using a designed pressure–volume–temperature (PVT) apparatus to obtain LLE properties as well as the extraction yield for bitumen/solvent systems. The experimental results indicated the extraction yield increased with increasing initial solvent concentration at all operating conditions. Comparatively, higher bitumen fractions were extracted at higher pressures, considering a constant initial solvent concentration. Increasing either the pressure or solvent-to-bitumen ratio led to higher light component extraction and resulted in a heavier bitumen-enriched phase. Finally, the extraction yield and solubility data for a bitumen/propane system was experimented and compared with those of a bitumen/ethane system at the same conditions. The results revealed that the propane has a greater ability than ethane to extract components from bitumen.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".