Intensified Mineral Carbonation of Natural Canadian Silicates Using Simultaneous Ball Milling
Bibliographic record
Abstract
Moving toward net zero emissions require new approaches and technologies, including capturing CO<sub>2</sub> from industrial sources, especially in remote locations where currently using fossil fuels could be unavoidable for generating electricity or machinery for mining, production of cement, steel, hydrogen, gas processing, etc. Mineral carbonation could fix CO<sub>2</sub> in a highly stable solid form. This study explores intensifying the carbonation process of natural Canadian silicates and minerals, kimberlite and wollastonite, which are available in mining sites where the emission occurs. Kimberlite is well-known for containing diamonds. After extracting the diamonds, the value of tailings can vary widely depending on the mineral content and the processing costs, while kimberlite is not as reactive as wollastonite for CO<sub>2</sub> sequestration purposes. This study explored the effects of ball milling and various methods for intensifying the mineral carbonation process for CO<sub>2</sub> sequestration. Calcium and magnesium hydroxides were used as reference materials to assess the effectiveness of the ball-mill reactor. Then, various parameters in the intensification of the carbonation process were investigated, and the effects of additives (sodium hydroxide and magnesium chloride), solvents (pure water and ethanol), and process parameters (temperature, reaction time, and CO<sub>2</sub> level) on carbonation and reaction rate, CO<sub>2</sub> uptake and mineral conversions were investigated. The carbonated samples were subjected to pH testing, calcimetry, XRD analysis and scanning electron microscopy (SEM). For most feedstocks, water as the main solvent led to higher carbonation and precipitating of different carbonates (hydromagnesite, aragonite, calcite, etc.), while for kimberlite, using NaOH led to higher performance. Ball-milling is designed for purposes such as milling, grinding, etc. The centrifugal forces and related phenomena could limit the contraction of CO<sub>2</sub> and other materials in the ball mill jar. However, the results of this study suggest that ball-milling can assist in intensifying mineral carbonation reactions.
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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 | 0.001 |
| Science and technology studies | 0.001 | 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".