Identification and Characterization of Reaction Proxies for Monitoring the Progress of Thermal Processing of Heavy Oils and Tar Sands under Vis-Breaking Conditions
Bibliographic record
Abstract
The vacuum residue prepared from Athabasca bitumen was heated at 380 °C for up to 5.5 h under vis-breaking conditions. The level of conversion was indicated by weight loss due to generation and removal of light ends from thermal cracking reactions. Classical molecular parameters that are commonly applied to indicate the level of thermal maturity of petroleum source rocks during burial maturation have been investigated toward indicating the extent of bitumen conversion under vis-breaking conditions. The molecular parameters known to monitor chemical reactions such as isomerization, carbon−carbon bond cracking, and aromatization showed strong correlations with the level of conversion during vis-breaking. The reaction mechanisms based on simple precursor−product relationships appear inherently more complex when quantitative molecular data are considered. For example, generation of Tm influences the behavior of Ts/(Ts + Tm), while changes in the triaromatic steroid parameter C 20 /(C 20 + C 28 S + C 28 R) is controlled by the apparent relative stabilities of the C 28 vs C 20 compounds. The behaviors of a number of parameters based on saturated and aromatic hydrocarbons are mainly controlled by the relative stabilities of individual compounds. However, in view of the strong positive correlations shown by saturated and aromatic hydrocarbon parameters in response to the extent of conversion, the parameters may be used to indicate maturity levels achieved under the vis-breaking conditions.
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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 | 0.000 | 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".