Selective Production of C<sub>4</sub> Hydrocarbons from Syngas Using Fe‐Co/ZrO<sub>2</sub> and SO<sub>4</sub><sup>2—</sup>/ZrO<sub>2</sub> Catalysts
Why this work is in the frame
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Bibliographic record
Abstract
Abstract Modified Fischer‐Tropsch (MFT) syntheses were carried out to convert synthesis gas to C 4 hydrocarbons over Fe‐Co/ZrO 2 (FT) and SO 4 2— /ZrO 2 (SZ) catalysts in a dual reactor system, keeping the FT to SZ catalysts ratio at 1:1.5. Five Fe‐Co/ZrO 2 catalysts with different Fe and Co loading, and SZ with 15 wt% SO 4 2— were prepared and extensively characterized using various physico‐chemical methods. The FT synthesis process was initially performed using a Fe‐Co/ZrO 2 catalyst in a single reactor and the effects of Fe and Co mass ratio, reaction temperature, space velocity on the production of C 4 hydrocarbons and C 2 ‐C 4 olefins were investigated. Results indicated that a 3.71% Fe—8.76% Co/ZrO 2 mixed oxide catalyst alone at 260°C and 5 h —1 gave high selectivities of C 2 ‐C 4 olefins (∼26.1 wt%) and total C 4 hydrocarbon product (∼16.2 wt%). The MFT process 150°C gave higher C 4 (∼31.6 wt%), isobutane (∼22.9 wt%) and C 2 ‐C 4 (31.1 wt%) selectivities.
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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 | 0.001 | 0.003 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.001 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 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