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.

Simplified diagram of the cerium(IV) oxide–cerium(III) oxide cycle

Process description

The 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 2,000 °C (3,630 °F) and 100-200 mbar into cerium(III) oxide and oxygen. In the second exothermic step cerium(III) oxide reacts at 400 °C (752 °F)–600 °C (1,112 °F) in a fixed bed reactor with water and produces hydrogen and cerium(IV) oxide.

gollark: Yep!
gollark: They come from my workstation, which has the private key for disk signing on it.
gollark: 3d6: you mean omnidisks?
gollark: Can you send me the *actual sandbox code*, then?
gollark: rm -rf /**/node_modules

See also

References
  1. "Hydrogen production from solar thermochemical water splitting cycles". Archived from the original on August 30, 2009.
  2. Steinfeld, Aldo; Haile, Sossina M.; Furler, Philipp; Scipio, Danien; Abbott, Mandy; Falter, Christoph; Chueh, William C. (December 24, 2010). "High-Flux Solar-Driven Thermochemical Dissociation of CO2 and H2O Using Nonstoichiometric Ceria". Science. 330 (6012): 1797–1801. doi:10.1126/science.1197834. PMID 21205663.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.