Kinetics and Mechanism of Oxidation of Hydrogen Sulfide by Concentrated Sulfuric Acid
Bibliographic record
Abstract
Our previous studies have shown that two reactions are significant when H 2 S is contacted with concentrated sulfuric acid: At temperatures from 20 to 60 °C and acid concentrations from 88 to 100 wt %, the rate of the first reaction was measured in terms of the initial rate of pressure drop when H 2 S and concentrated sulfuric acid were brought together in a volume-constant batch reactor. It is indicated that the reaction is first order with respect to H 2 S. The global rate constant includes the effects of temperature and acid concentration. The effect of temperature was correlated using the Arrhenius equation. The activation energy and the natural logarithm of the preexponential factor are linearly related to the acid concentration. An illustration of molecular collision at the gas−liquid interface was shown to explain the reaction mechanism. This study also provides a kind of quantitative measurement for the oxidizing ability of concentrated sulfuric acid.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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) | 0.001 | 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 source (direct Gemma or distilled Codex), 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".