Английская Википедия:Cerium(IV) oxide–cerium(III) oxide cycle
The cerium(IV) oxide–cerium(III) oxide cycle or CeO2/Ce2O3 cycle is a two-step thermochemical process that employs cerium(IV) oxide and cerium(III) oxide for hydrogen production.[1] The cerium-based cycle allows the separation of H2 and O2 in two steps, making high-temperature gas separation redundant.
Process description
The thermochemical two-step water splitting process (thermochemical cycle) uses redox systems:[2]
- Dissociation: 2CeO2 → Ce2O3 + 0.5 O2
- Hydrolysis: Ce2O3 + H2O → 2CeO2 + H2
For the first endothermic step, cerium(IV) oxide is thermally dissociated in an inert gas atmosphere at Шаблон:Convert and 100-200 mbar into cerium(III) oxide and oxygen. In the second exothermic step cerium(III) oxide reacts at Шаблон:Convert–Шаблон:Convert in a fixed bed reactor with water and produces hydrogen and cerium(IV) oxide.
See also
- Copper–chlorine cycle
- Heliostat
- Hybrid sulfur cycle
- HYDROSOL
- Iron oxide cycle
- Solar thermal energy
- Sulfur–iodine cycle
- Zinc–zinc oxide cycle
References
External links
