Studies of SO<sub>2</sub>- and O<sub>2</sub>-Induced Degradation of Aqueous MEA during CO<sub>2</sub> Capture from Power Plant Flue Gas Streams
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
A comprehensive study was conducted to evaluate the contributions of sulfur dioxide (SO 2 ) and oxygen (O 2 ) to the degradation of monoethanolamine (MEA) during CO 2 capture from power-plant flue gas streams. The study was performed in a 600-mL semibatch autoclave reactor, using aqueous MEA concentrations in the range of 3−7 mol/L at temperatures in the range of 328−413 K and a constant gas pressure of 250 kPa. The aqueous MEA was contacted with SO 2 /O 2 /N 2 gas mixtures that had SO 2 concentrations in the range of 6−196 ppm and O 2 concentrations in the range of 6−100 mol %. The effects of CO 2 and a corrosion inhibitor (NaVO 3 ) were also evaluated. The results showed that both SO 2 and O 2 were detrimental, because they accelerated the rate of MEA degradation. NaVO 3 also accelerated the MEA degradation rate, whereas CO 2 had the opposite effect. A new kinetic model was formulated to account for the presence of O 2 and the option of the presence or absence of SO 2 in the flue gas stream. This was of the form:
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.002 | 0.003 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.002 | 0.003 |
| 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 it