Kinetics of the Oxidative Degradation of CO<sub>2</sub>Loaded and Concentrated Aqueous MEA-MDEA Blends during CO<sub>2</sub>Absorption from Flue Gas Streams
Bibliographic record
Abstract
A study of empirical kinetic models of the degradation of MEA and MDEA in MEA-MDEA-H 2 O-O 2, MEA-MDEA-H 2 O-CO 2, and MEA-MDEA-H 2 O-O 2 -CO 2 systems was conducted in a stirred cell reactor at temperatures in the range of 328−393 K, overall amine concentration of 7−9 mol/L, MEA/MDEA ratio ( r ) in the range of 2.5:1−9:1, CO 2 loading (α) in the range of 0.4 and 0.43 mol/mol total amine, and a CO 2 or O 2 pressure of 250 kPa. The results showed that higher total amine concentrations and temperatures resulted in higher rates of degradation, whereas higher CO 2 loadings had the opposite effect. The results, however, showed that the rates of degradation of MEA and MDEA in the MEA-MDEA-H 2 O-CO 2 system were practically zero. On the other hand, both the MEA-MDEA-H 2 O-O 2 and the MEA-MDEA-H 2 O-CO 2 -O 2 systems had rates greater than zero.
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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 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| 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".