Intrinsic Reaction Kinetics of Higher Alcohol Synthesis from Synthesis Gas over a Sulfided Alkali-Promoted Co−Rh−Mo Trimetallic Catalyst Supported on Multiwalled Carbon Nanotubes (MWCNTs)
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Bibliographic record
Abstract
A statistically designed set of experiments was run in a continuous downflow fixed-bed reactor to evaluate the intrinsic kinetics of the formation of methanol, higher alcohols, total hydrocarbon, and carbon dioxide from synthesis gas under a range of experimental conditions. To eliminate mass-transfer resistance, a multiwalled carbon nanotube (MWCNT)-supported K-promoted trimetallic sulfided Co−Rh−Mo catalyst was used in the particle size range of 147−210 μm. To predict the reaction rate for higher alcohol synthesis, the power law model was used for the reaction between CO and H 2 on the catalyst surface. The operating conditions, such as reactor temperature ( T ), pressure ( P ), gas hourly space velocity (GHSV), and H 2 /CO molar ratio, were varied in the ranges of 275−350 °C, 800−1400 psig (5.52−9.65 MPa), 2.4−4.2 m 3 standard temperature and pressure (STP) (kg of catalyst) −1 h −1, and 0.5−2.0, respectively. The data of this study are well-fitted by the power law model. The activation energies of ethanol and higher alcohols obtained over Co−Rh−Mo−K/MWCNT were low compared to those values reported in the literature.
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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 | 0.000 | 0.001 |
| 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 | 0.001 | 0.001 |
| 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 it