Production of Hydrogen and/or Syngas (H<sub>2</sub> + CO) via Steam Gasification of Biomass-Derived Chars
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Bibliographic record
Abstract
Steam gasification of two biomass-derived chars was studied at 700, 750, and 800 °C in a fixed bed microreactor at different steam flow rates in the range of 1.25 to 10 g/h/g of char. The chars used in the present study were (i) bagasse char obtained from Natural Resources Canada, CANMET Energy Technology, Ontario (produced by Dynamotive Technologies Corp., Vancouver, BC), and (ii) commercial char obtained from ENSYN Technologies Inc., Ontario (produced during the fast pyrolysis of biomass using their RTI process). Both chars were highly reactive, particularly at 800 °C with steam flow rate of 5 and 10 g/h/g of char. In the case of bagasse char, maximum conversion of 81% was achieved at 800 °C with a steam flow rate of 10 g/h/g of char, whereas maximum conversion of 69% for commercial char was obtained at 800 °C with steam flow rates of 5 and 10 g/h/g of char. The product gas obtained was mainly a mixture of H 2, CO, CO 2, and CH 4 with a high H 2 /CO molar ratio (about 4:7 for bagasse char and 9:15 for commercial char) at a temperature of 800 °C and a steam flow rate of about 10 g/h/g of char. Under the present reaction conditions, synthesis gas (H 2 + CO) produced by steam gasification of bagasse char and commercial char was in the range of 80−88 mol % and 77−84 mol %, respectively. The heating value of the product gas was in the range of 270−290 Btu/scf for bagasse char and 250−280 Btu/scf for commercial char. The results suggest that there is a strong potential for producing hydrogen and syngas from biomass-derived chars by a simple steam gasification process.
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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 | 0.000 |
| 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 it