Metastability of CuCl2 in H2O-HCl for the Copper-Chlorine Thermochemical Cycle of Hydrogen Production
Bibliographic record
Abstract
In this paper, metastability of CuCl2 in H2O-HCL for applications to the Cu-Cl thermochemical cycle is experimentally investigated to decrease crystallizing (precipitating) temperature and reduce thermal energy requirements of the cycle. Metastability delays the phase transition by altering the phase transition temperature, depending on direction (heating or cooling). The dissolving temperature is increased if the solution is heated and decreased if the solution is cooled, whereas a typical simple solubility model assumes dissolving and crystallizing occur at the same temperature. The solution temperature is controlled using an ethylene-glycol heater/chiller and measured with a thermocouple. The results of this paper show the metastable zone width increases with cooling rate and is unaffected by HCL concentration. The solubility product constant is calculated for CuCl2 dissolving in various concentrations of HCL and decreases with increasing temperature and HCL concentration.
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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 | 0.001 |
| 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 | 0.001 | 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".