| 词条 | Zinc–zinc oxide cycle |
| 释义 |
The zinc–zinc oxide cycle or Zn–ZnO cycle is a two step thermochemical cycle based on zinc and zinc oxide[1] for hydrogen production[2] with a typical efficiency around 40%.[3] Process descriptionThe thermochemical two-step water splitting process uses redox systems:[4]
For the first endothermic step concentrating solar power is used in which zinc oxide is thermally dissociated at {{convert|1900|°C|°F}} into zinc and oxygen. In the second non-solar exothermic step zinc reacts at {{convert|427|°C|°F}} with water and produces hydrogen and zinc oxide. The temperature level is realized by using a solar power tower and a set of heliostats to collect the solar thermal energy. See also
References1. ^Solar Hydrogen Production from a ZnO/Zn Thermo-chemical Cycle {{webarchive |url=https://web.archive.org/web/20080724183416/http://www.solarpaces.org/Tasks/Task2/SHP.HTM |date=July 24, 2008 }} 2. ^Project PD10 3. ^Novel Method for solar hydrogen generation {{webarchive |url=https://web.archive.org/web/20090205122515/http://www.switt.ch/files/technologien/Solar%20Hydrogen%20Production_04-014.pdf |date=February 5, 2009 }} 4. ^[https://web.archive.org/web/20060505180329/http://solar.web.psi.ch:80/data/research/zno/roca/ Solar thermal ZnO-decomposition] External links
2 : Chemical reactions|Hydrogen production |
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