Li Promoted Sodium Zirconates as High Temperature Absorbent
Bibliographic record
Abstract
Previous studies reported that Na2ZrO3 exhibited better high temperature CO2 capture features than other Li-base materials towards its use in hydrogen production. This work is aimed to increase Na2ZrO3 absorption capacity by the addition of Li. Na2ZrO3 was synthesized by solid-state reaction and impregnated with LiNO3 at different Li/Na molar ratios: 0, 0.03, 0.05, 0.1 and 0.25. Characterization consisted in XRD and SEM. Absorbents were evaluated by TGA at 600 °C, 80 % CO2/Ar (absorption) and 800 °C, air (regeneration). XRD results found the Na2ZrO3 structure in all samples. However, Li promoted samples presented substitution of Na by Li in the Na2ZrO3 structure. According to TGA, absorption/regeneration kinetics was not modified by the effect of Li. Instead, CO2 capture capacity increased with Li content up to a limit between 10 to 25 % mol. This was attributed to formation of Na4ZrO4 type structures, which can be responsible of the increase in capture capacity.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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) | 0.001 | 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 source (direct Gemma or distilled Codex), 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".