Effects of Operation Parameters on the Benzaldehyde Formation in the LiquidPhase Oxidation of Toluene
Bibliographic record
Abstract
The liquid-phase oxidation of toluene by air is an environment benign technology for producing benzoic acid and benzaldehyde. In a Φ48?mm bubble column reactor, effects of operation parameters, such as air flow rate, temperature, and initial concentrations of benzoic acid, Co, benzene and water, on the concentration and selectivity of benzaldehyde were studied. The results show that, benzaldehyde is an intermediate in the consecutive reaction. At 165?℃, the reaction rate constant of benzaldehyde oxidation is about 0.08?min~(-1). In a sufficiently aerated reaction system, benzaldehyde concentration reached a maximum after 20 minutes. It kept unchanged in the next 80 minutes and then gradually lowered. High temperature enhanced the drop of benzaldehyde concentration in the last period. In a situation of high water concentration, absence of catalyst or benzoic acid, the benzaldehyde concentration increases with reaction time because the further reaction is inhibited. And the selectivity keeps high.
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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".