Piperazine and methyldiethanolamine interrelationships in CO<sub>2</sub> absorption by aqueous amine mixtures. Part I: Saturation rates of single‐reagent solutions
Bibliographic record
Abstract
Abstract Formulation of efficient absorbing solutions for carbon dioxide capture is essential to reduce the operation costs of industrial gas treatment plants. Recently, mixed amine systems, typically composed of a tertiary and a primary or secondary amine, have been a growing interest in academic and industrial research. In particular, the so‐called activated methyldiethanolamine (aMDEA), which contains small amounts of piperazine (PZ), has become one of the most promising new candidates. This work intends to perform a comparison between the performance of single amines on the one hand and their blends on the other hand with the aim of elucidating how PZ and MDEA can interact in the latter situation. In the first part, aqueous solutions made up of a pure reagent (either MDEA or PZ) were studied. Rates of CO 2 transfer from a gas phase to unloaded and loaded solutions, up to nearly saturation points, were experimentally investigated for a wide range of operating conditions using a membrane contactor. Observed CO 2 transfer rates were reproduced with a simple yet effective model that captured the main physical and chemical aspects.
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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".