Determination of Vapor–Liquid Equilibrium (VLE) Plots of 1-Dimethylamino-2-propanol Solutions Using the pH Method
Bibliographic record
Abstract
In this work, the pH values of 1-dimethylamino-2-propanol (1DMA2P) solution were measured over a CO 2 loading range of 0–0.8 mol CO 2 /mol amine, 1DMA2P concentration range of 1.5–4.0 mol/L, and a temperature range of 298–303 K. Two-dimensional (2D) vapor–liquid equilibrium (VLE) plots of the 1DMA2P–H 2 O–CO 2 system were established by calculating ion concentrations in the 1DMA2P solution using the pH method. A three-dimensional (3D) VLE surface representing the concentrations of ions in the 1DMA2P solution was also obtained. In addition, equations were generated and used to predict CO 2 loading in 1DMA2P solution, based on knowledge of amine concentration, temperature, and pH of the solution. The results showed that these equations performed very well in predicting the CO 2 loading of a 1DMA2P solution, with an absolute average deviation (AAD) of 9.2%.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.002 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
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 source (direct Gemma or distilled Codex), 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".