Kinetics of Hydrogen Uptake and Release from Heteroaromatic Compounds for Hydrogen Storage
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Bibliographic record
Abstract
The kinetics of hydrogen uptake by N -ethylcarbazole and carbazole, and the kinetics of H 2 release from their hydrogenated products, is reported. The hydrogenation of N -ethylcarbazole at 130−150 °C on Ru was well described by a network of first-order stepwise hydrogenation reactions. The hydrogenation of N -ethylcarbazole was significantly faster than the hydrogenation of carbazole, and in both cases, >95% selectivity to the completely hydrogenated products, dodecahydro- N -ethylcarbazole and dodecahydrocarbazole, was achieved. The dehydrogenation of dodecahydro- N -ethylcarbazole at 101 kPa and 150−170 °C, proceeded to 100% conversion of the reactant over a Pd catalyst within 1 h. However, only 69% of the stored H 2 was recovered due to a low selectivity to N -ethylcarbazole. In the case of dodecahydrocarbazole dehydrogenation at 101 kPa and 170 °C over the same Pd catalyst, 28% H 2 recovery was obtained due to the strong adsorption of the product carbazole on the catalyst surface that also resulted in a slower rate of dodecahydrocarbazole dehydrogenation compared to dodecahydro- N -ethylcarbazole.
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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 | 0.001 | 0.001 |
| 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