Conversion of CO<sub>2</sub>over a Co-Based Fischer–Tropsch Catalyst
Why this work is in the frame
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Bibliographic record
Abstract
The conversion of CO 2 over a CoPt/Al 2 O 3 catalyst was investigated. Single-gas adsorption studies indicated that carbon was deposited on the catalyst by exposure to both CO 2 and CO in the absence of H 2 cofeed. When CO 2 was preadsorbed followed by H 2 flow, methane was produced, as well as traces of C 3 –C 4 hydrocarbons, but no evidence of the reverse water gas shift reaction was found. Use was made of carbon-14-labeled carbon dioxide to track CO 2 conversion and selectivity during reaction of syngas mixtures with different ratios of CO, CO 2, and H 2 . Absence of 14 C in unconverted CO and the unequal molar concentration of 14 C in the products from reaction at 220 °C and 2 MPa provided strong evidence that 14 CO 2 was not converted by the reverse water gas shift reaction. The antecedence of the carbon from CO 2 mattered, and the carbon did not become part of a common carbon pool for hydrocarbon synthesis. Conversion of CO 2 proceeded by a pathway separate from CO. Conclusions drawn from this experimental study were employed to determine implications for the industrial application of Co-catalyzed Fischer–Tropsch synthesis.
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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) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.002 |
| 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