Thermochemical redox cycle
A metal oxide is reduced endothermically at high temperature and re-oxidised by water or carbon dioxide at a lower temperature, storing thermal exergy as hydrogen or carbon monoxide.
Atlas record: 4 claims reference this phenomenon — 4 established.
Explorerelations · matrix context · routes · sources · cite
Relations
- a redox-active metal oxide (ceria, ferrites) reduced at 1400–1800 K, typically in a solar receiver, and re-oxidised by H₂O or CO₂ at 800–1200 K
- for an ideal solar thermochemical process the heat-to-work (exergy) factor is bounded by 1 − T_L/T_H, with T_H the receiver/process temperature and T_L the heat-rejection reservoir, usually the environment; T_L is not in general the re-oxidation temperature; the receiver absorption efficiency multiplies this factor
Matrix context
D = disequilibrium row · C = coupling family column. A cell reads the state of the atlas for that pair.
Enumerated routes through this · 10
- Temperature gradient → Thermochemical redox cycle → Chemical fuel (H₂, CO, syngas) → Chemical fuel3/3 est · candidate
- Chemical potential difference → Combustion → Temperature gradient → Thermochemical redox cycle → Chemical fuel (H₂, CO, syngas) → Chemical fuel5/5 est · same energy form
- Electric potential difference → Peltier effect → Temperature gradient → Thermochemical redox cycle → Chemical fuel (H₂, CO, syngas) → Chemical fuel5/5 est · candidate
- Electric potential difference → Ettingshausen effect → Temperature gradient → Thermochemical redox cycle → Chemical fuel (H₂, CO, syngas) → Chemical fuel5/5 est · candidate
- Incident radiation flux → Photothermal absorption → Temperature gradient → Thermochemical redox cycle → Chemical fuel (H₂, CO, syngas) → Chemical fuel5/5 est · candidate
- Radiative imbalance with the sky → Radiative sky cooling → Temperature gradient → Thermochemical redox cycle → Chemical fuel (H₂, CO, syngas) → Chemical fuel5/5 est · candidate
- Nuclear binding-energy difference → Nuclear fission → Temperature gradient → Thermochemical redox cycle → Chemical fuel (H₂, CO, syngas) → Chemical fuel5/5 est · candidate
- Nuclear binding-energy difference → Nuclear fusion → Temperature gradient → Thermochemical redox cycle → Chemical fuel (H₂, CO, syngas) → Chemical fuel3/5 est · candidate
- Nuclear binding-energy difference → Radioactive decay → Beta particles → Radioisotope heating → Temperature gradient → Thermochemical redox cycle → Chemical fuel (H₂, CO, syngas) → Chemical fuel7/7 est · extends a recorded pathway
- Nuclear binding-energy difference → Radioactive decay → Alpha particles → Radioisotope heating → Temperature gradient → Thermochemical redox cycle → Chemical fuel (H₂, CO, syngas) → Chemical fuel7/7 est · extends a recorded pathway
Cited sources · 2
- [1]S. Abanades. Redox Cycles, Active Materials, and Reactors Applied to Water and Carbon Dioxide Splitting for Solar Thermochemical Fuel Production: A Review (2022)
- [2]A. Steinfeld. Solar thermochemical production of hydrogen––a review (2005)
Cite this entity
Physical Transformation Atlas (2026). entity phenomenon:thermochemical-redox-cycle: Thermochemical redox cycle. Dataset revision rbfbfcbb70e57 (hash of the canonical data). https://physical-transformation-atlas.wldud5192.workers.dev/phenomenon/thermochemical-redox-cycle
Ids and matrix addresses are stable across revisions; the revision hash identifies the exact canonical files the record was compiled from and is meta.data_hash in every /api export. Reuse terms: see the license field in any export.