Kinetics of the Absorption of CO<sub>2</sub>into Mixed Aqueous Loaded Solutions of Monoethanolamine and Methyldiethanolamine
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Bibliographic record
Abstract
The kinetics of absorption of CO 2 in loaded mixed methyldiethanolamine (MDEA) and monoethanolamine (MEA) solutions was investigated in a laboratory laminar jet apparatus. The experiments were conducted over the temperature range of 298−333 K, MDEA/MEA wt ratio of 27/03, 25/05 and 23/07, total amine concentration of 30 wt %, and CO 2 loading from 0.005 to 0.15 (mol of CO 2 )/(mol of total amine). Physical properties such as density, viscosity, diffusivity, and solubility of the system were calculated from published data and/or models. Reaction mechanisms, namely, zwitterion and termolecular, were used to interpret the kinetic data. It was observed that the zwitterion mechanism in its original form could not predict the individual kinetic rate constants. Equally, the termolecular mechanism with water in the apparent reaction rate term also did not yield any reasonable results. A modified termolecular mechanism, which included the contribution of hydroxide ions, was able to predict the kinetics of a CO 2 loaded mixed alkanolamine solution satisfactorily with MDEA not participating with MEA in the kinetics. Individual reaction rate constants were predicted based on the modified termolecular mechanism.
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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 |
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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 it