Sorption of Chlorobenzene Vapors on Styrene−Divinylbenzene Polymer
Bibliographic record
Abstract
Headspace gas chromatography was used to measure sorption equilibra between XAD-2, a styrene−divinylbenzene copolymer, and gaseous 1,2-dichlorobenzene (1,2-DiCB), 1,2,4,5-tetrachlorobenzene (1,2,4,5-TeCB) and hexachlorobenzene (HCB) at temperatures above 40 °C. From the measurements, the sorption isotherms were constructed for the systems 1,2-DiCB/XAD-2, 1,2,4,5-TeCB/XAD-2, and HCB/XAD-2. It is shown that (a) capillary condensation within the mesopore structure of XAD-2 occurs at higher partial pressures; (b) the equilibrium data at relatively low partial pressures can be fitted to Freundlich isotherms; and (c) the sorption isotherms for the three compounds of interest are linear at very low partial pressures. Sorption coefficients at low partial pressures and 20 °C, extrapolated from the slopes of the linear isotherms obtained in the temperature range 90 °C to 130 °C, were (1.2 × 10 -6, 1.5 × 10 -5, and 1.6 × 10 -2 ) mol·m -2 ·Pa -1 for 1,2-DiCB/XAD-2, 1,2,4,5-TeCB/XAD-2, and HCB/XAD-2, respectively. This is in good agreement with values predicted using empirical models proposed in the literature.
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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 | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| 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".