Production of Light Oil by Oxidative Cracking of Oil Sand Bitumen Using Iron Oxide Catalysts in a Steam Atmosphere
Bibliographic record
Abstract
Catalytic cracking of Canadian oil sand bitumen was performed using zirconia−alumina−iron oxide catalysts at 450−500 °C in a steam atmosphere. The heavy-oil fraction of bitumen was oxidatively cracked to produce light oil, corresponding to gasoline, kerosene, and gas oil, with a boiling point of <350 °C. However, some coke was generated after the reaction of bitumen, whereas coke was not generated from conventional residual oil at the same reaction conditions. To suppress the coke generation, reaction conditions were changed on the basis of the reaction mechanism. When the time factor (ratio of the catalyst weight/feedstock flow rate) increased, large amounts of active oxygen species were generated from steam and these species suppressed the coke formation. The largest yield of light oil was approximately 50 mol % C with no coke formation for reaction conditions of a time factor of 3.6 h at 450−500 °C and 2.0 h at 500 °C.
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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".