Depolarized Light Scattering for Study of Heavy Oil and Mesophase Formation Mechanisms
Bibliographic record
Abstract
Mesophase formation in heavy oil fractions during thermal cracking was studied by a depolarized light scattering technique using a high temperature/high pressure stirred hot-stage reactor. The advantage of this technique relies on its ability to track the ordering of components at the molecular and nanoscale prior to the onset of observable mesophase. A mechanism for mesophase formation in pitches has been suggested based on the evaluation of the previous models for mesophase formation with the scattering results. The results suggest that mesophase formation does not follow a typical phase separation or nucleation process but instead is a result of the homogeneous self-assembly of planar aromatic molecules into clusters and finally spherical submicrometer domains that coalesce to form the final texture of micrometer-scale mesophase spheres. The scattering behavior of asphaltenes suggests that this material is more aggregated than the maltenes, at temperatures up to 350 °C. This new technique can be used in conjunction with traditional hot-stage microscopy to study the mechanisms of mesophase formation and predict the onset of mesophase formation during the cracking of heavy oil.
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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".