High pressure vapour-liquid equilibrium measurement for perfluorinated chemicals using a static analytical apparatus.
Bibliographic record
Abstract
The current study contributes to the continuing research on the measurement and correlation of phase equilibrium data of binary mixtures of 1, 1, 2, 3, 3, 3-hexafluoro-1-propene (R-1216) and alkanes.Fluorinated refrigerants such as R-1216 (not in pure form) are excellent contenders within the next generation of refrigerants that can meet the requirements of Montreal and Kyoto protocols.Since these refrigerants could prove their suitability to be excellent candidates as probable replacements of refrigerants with higher global warming potentials, as such the refrigeration industry is in need of experimental data regarding R-1216 and its mixtures so as to enhance process efficiencies.R-1216 was chosen as the focus of the study because has gained eminence in research activities as it finds use as an intermediate in chemical reactions and as a monomer in the production of polymers among other applications.Within the larger research project, investigations have been undertaken into the experimental measurement of vapour pressures and densities for pure hexafluoropropylene and the measurement of isothermal binary vapour-liquid equilibrium (VLE) data for systems involving R-1216 and alkenes (ethylene, propylene, and 1-butene).And, phase equilibrium data for mixtures involving R1216 with ethane (R-170), propane and n-butane have been measured.This work is a continuation of the work on binary mixtures of R-1216 with alkanes.This study concerned the measurement of isothermal high-pressure binary HPVLE data for mixtures of R-1216 + [n-pentane, n-hexane and n-heptane] at temperatures ranging between 352 -423 K, and pressures up to 3.0 MPa.
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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) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| 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 | 0.001 | 0.001 |
| 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 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".