Simultaneous Adsorption of H<sub>2</sub>S and CO<sub>2</sub> on Triamine-Grafted Pore-Expanded Mesoporous MCM-41 Silica
Bibliographic record
Abstract
The feasibility of using triamine-grafted pore-expanded mesoporous MCM-41 silica (TRI-PE-MCM-41) as a potential adsorbent for simultaneous removal of CO 2 and H 2 S was investigated. Adsorption isotherms of CO 2 and H 2 S were measured at different temperatures, whereas adsorption at low H 2 S concentrations from 700 to 10000 ppm with balance CO 2 was studied at 298 K. It was found that both CO 2 and H 2 S adsorb and the selectively toward H 2 S versus CO 2 decreases at an increasing H 2 S concentration. Because TRI-PE-MCM-41 hardly adsorbs any of the common gases, such as CH 4, H 2, N 2, O 2, and CO, it was inferred that this material may be suitable for the purification of a variety of gas streams containing CO 2 and H 2 S. These findings lay the ground for the development of a single-stage process for the removal of CO 2 and H 2 S from biogas, using amine-supported PE-MCM-41.
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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 | 0.000 | 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) | 0.001 | 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 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".