Cleaner hydrogen production by microwaves: Experimental investigation and comparative assessment
Bibliographic record
Abstract
Sustainable development goals of the United Nations require cleaner energy solutions and carbon-free fuels. Hydrogen, in this regard, appears to be a unique candidate for all, and its production in a cleaner manner is critically important, which is the prime focus in the present paper. This study focuses on the newly designed experimental investigations into microwave-driven water dissociation for cleaner hydrogen production, specifically exploring the effect of various tungsten-based electrode materials and steam inlet conditions on hydrogen production. The evaluation is conducted in two main sections, assessing hydrogen production at the water dissociation level and the overall system. Some of the key observations include a positive correlation between steam inlet temperature and hydrogen production for all electrode materials, with lanthanated tungsten demonstrating superior performance. When only the water dissociation is considered, lanthanated tungsten electrodes exhibit the most favorable energy consumption, showcasing the minimum energy requirement for hydrogen production. Incorporating the overall energy and exergy efficiencies, the lanthanated tungsten emerges as the top performer, followed by ceriated tungsten, attributed to their superior arc stability. The energy requirement per kg of hydrogen varies from 51.98 kWh/kg to 56.66 kWh/kg for varying steam inlet temperatures from 104 °C to 120 °C. The highest energy and exergy efficiencies are recorded to be 64.1 % and 62.3 %, respectively, for lanthanated tungsten electrodes at 120 °C steam inlet temperature. When all energy inputs (steam generation, preheating, condenser pump, and microwave generator) are considered, the overall energy and exergy efficiencies are found to be 35.1 % and 34.2 %, respectively. The energy needed for 1 kg of hydrogen production is recorded to be 94.87 kWh/kg. Consequently, the lanthanated tungsten electrode stands out as a superior performer, offering valuable implications for advancing microwave hydrogen production technologies. • It experimentally investigates clean hydrogen production using microwaves. • The lanthanated tungsten electrodes help enhance the hydrogen production. • Higher steam temperature results in an increased hydrogen production. • The energy need for H 2 production ranges 51.98–56.66 kWh/kg at different steam temperatures.
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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 | 0.001 |
| 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".