Effect of the Particle Size on Asphaltene Adsorption and Catalytic Oxidation onto Alumina Particles
Why this work is in the frame
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Bibliographic record
Abstract
In this study, the adsorption and catalytic oxidation of asphaltenes, problematic heavy hydrocarbons present in heavy oil, onto two aluminas with different particle sizes and comparable surface acidity were investigated. Equilibrium batch adsorption experiments were conducted at 25 °C with solutions of asphaltenes in toluene at concentrations ranging from 100 to 3000 mg/L. Adsorption data were fit to the Langmuir and Freundlich isotherm models. Nano-alumina fit better to the Langmuir model, while micro-alumina fit well to the Freundlich model. On a surface area basis, nano-alumina has higher adsorption capacity for asphaltenes than micro-alumina. Interestingly, micro-alumina has higher catalytic activity toward asphaltene oxidation than nano-alumina, at the same asphaltene loading, thus exhibiting the significance of textural properties during catalytic oxidation of asphaltenes that dominated over the effect of the particle size.
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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 it