Developments in SO{sub 3} decomposition for nuclear hydrogen production
Bibliographic record
Abstract
The Sulphur-Iodine (S-I) Cycle is considered to be one of the best thermochemical hydrogen production processes currently under development in many countries. While the Very High Temperature Reactors (VHTRs) are capable of satisfying the high temperature requirements of all the steps of this process, Canada's Supercritical Water Reactor (SCWR) can satisfy the temperature requirements of all but the catalytic SO{sub 3} decomposition step. However, AECL's direct electrically heated catalytic structures may be used for the decomposition with only a marginal lowering of the overall efficiency of the S-I process. An externally heated reactor system with a 25-mm diameter by 100-mm long section for catalyst loading has been set-up and a few blank tests (without any catalyst) have been conducted. Pt-TiO{sub 2} and Fe{sub 2}O{sub 3} catalysts on ceramic rings were tested to provide base-case results for comparison with catalysts to be tested with electro-resistive heating. The H{sub 2}SO{sub 4} thermal decomposition was carried out at around 475 deg. C and SO{sub 3} decomposition rates were determined over the range of 500 to 900 deg. C. While both catalysts were very active for the decomposition reaction at the higher end of the range, the Pt-TiO{sub 2} catalyst was active even atmore » the 500 deg. C region with the Fe{sub 2}O{sub 3} catalyst being active only above 600 deg. C. (authors)« less
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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 | 0.000 | 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 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".