Synthesis and evaluation of nanostructured NiMoS 2/SiO 2 microspheres as hydrodesulfurization catalysts
Bibliographic record
Abstract
NiMoS 2 has been widely used as active component in hydrodesulfurization (HDS) in hydrotreating sulphur-containing fractions during petroleum refining and heavy oil upgrading. Having the potential to enhance catalyst activity, nanostructured NiMoS 2 has attracted significant interests in recent years. However, synthesis of NiMoS 2 with uniform structure is challenging due to easily precipitation of NiS x. In this work, a new method was developed for direct synthesis of uniform nanostructured NiMoS 2/SiO 2 microspheres by ultrasonic spray pyrolysis. The synthesized catalysts were characterized using scanning electron micrograph /energy dispersive spectroscopy, X-ray diffraction, nitrogen isotherm as well as transmission electron microscopy, which confirmed the formation of uniform nanostructured NiMoS 2/SiO 2. It was found that these materials had an average pore size of 6.8 nm with a uniform pore size distribution. The catalytic activity of these catalysts was evaluated using a model compound, dibenzothiophene, with promising results. The HDS kinetics will also be discussed in this presentation.
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How this classification was reachedexpand
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 | 0.000 |
| 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) | 0.000 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".