Abstract
The efficiency of many processes strongly depends on their thermodynamic reversibility, i.e., proximity to equilibrium throughout the process. In thermochemical cycles for water and/or carbon dioxide splitting, thermochemical air separation, and thermochemical energy storage, operating near equilibrium means that the oxygen chemical potential of the solid and gas phases must not differ significantly. We show that approaching this ideal is possible in thermal reduction only if the reaction step occurs at a specific, reaction coordinate- and material-dependent temperature. The resulting thermal reduction temperature profile also depends on the ratio of gas and solid flows.
Original language | English (US) |
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Pages (from-to) | 10474-10482 |
Number of pages | 9 |
Journal | International Journal of Hydrogen Energy |
Volume | 47 |
Issue number | 19 |
DOIs | |
State | Published - Mar 1 2022 |
Keywords
- Counter-current reactor
- Hydrogen generation
- Redox reaction
- Solar thermal
- Thermochemical water splitting
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Fuel Technology
- Condensed Matter Physics
- Energy Engineering and Power Technology