Solvent-Free CO2 Cycloaddition of Propylene Oxide via Novel Composite of SAPO-34/ZIF-8
Bibliographic record
Abstract
In this research, ZIF-8/SAPO-34 composites with various wt.% of ZIF-8 and SAPO-34 were prepared and used as catalysts to synthesize cyclic carbonate solventless from CO2 and propylene oxide. Among composites, SAPO-34/ZIF-8 75:25 wt.% (S/Z25) had the highest conversion value of 92.59%, confirmed by 1HNMR analysis. Various physicochemical techniques were used to characterize the optimized composite, including X-ray diffraction (XRD), SEM, FT-IR, and BET. The impact of different reaction parameters such temperature, reaction time, CO2 pressure, and catalyst amount on the catalyst reactivity were studied. The highest conversion value has been obtained at 120 psi, 100 ℃, and 240 min. The conversion value was decreased by 20% when the catalyst loading value was changed from 0.4 to 0.1 g. Additionally, the catalyst's recyclability was confirmed for three runs without any significant changes in conversion. However, it was observed that after five repeated tests of reusability, the conversion percentage value decreased from 92.59% to 88.66%.,
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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) | 0.001 | 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 | 0.000 | 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 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".