Steady-State Multiplicity and Superadiabatic Extinction Waves in the Oxidation of CO/H<sub>2</sub> Mixtures over a Pt/Al<sub>2</sub>O<sub>3</sub>-Coated Monolith
Bibliographic record
Abstract
Steady-state multiplicity was observed in the catalytic oxidation of mixtures of H 2 and CO over a cordierite monolith wash-coated with Pt/Al 2 O 3. Increasing the CO concentration or decreasing the H 2 concentration across the hysteresis limit results in extinction, whereas decreasing the CO concentration or increasing the H 2 concentration across the other hysteresis limit causes ignition. CO inhibits the ignition of H 2, whereas H 2 assists the ignition of CO. Extinction of the reaction due to a step increase of CO or a step decrease of H 2 occurred in the form of a downstream-moving wave accompanied by a sharply localized superadiabatic temperature excursion. Axial temperatures were recorded by five equally spaced thermocouples. The superadiabatic rise in temperature and the speed of the extinction wave are related in a complex way to the size of the CO jump into the hysteresis zone. The greater the H 2 jump downward in concentration, the lower the maximum temperature and the greater the speed of the reaction front.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.004 | 0.003 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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".