| 词条 | Cerium(IV) oxide–cerium(III) oxide cycle |
| 释义 |
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 descriptionThe thermochemical two-step water splitting process (thermochemical cycle) uses redox systems:[2]
For the first endothermic step, cerium(IV) oxide is thermally dissociated in an inert gas atmosphere at {{convert|2000|°C|°F}} and 100-200 mbar into cerium(III) oxide and oxygen. In the second exothermic step cerium(III) oxide reacts at {{convert|400|°C|°F}}–{{convert|600|°C|°F}} in a fixed bed reactor with water and produces hydrogen and cerium(IV) oxide. See also
References1. ^Hydrogen production from solar thermochemical water splitting cycles {{webarchive |url=https://web.archive.org/web/20090830011704/http://www.solarpaces.org/Tasks/Task2/HPST.HTM |date=August 30, 2009 }} 2. ^[https://www.sciencemag.org/content/330/6012/1797.abstract High-Flux solar-driven thermochemical dissociation of CO2 and H2O using nonstoichiometric ceria ] External links
3 : Chemical reactions|Hydrogen production|Cerium |
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