Zinc-sulfate thermoelectrochemical hydrogen cycle
The Institute of Gas Technology is currently developing a hybrid thermochemical-electrochemical water-splitting cycle based on zinc sulfate chemistry. The zinc sulfate cycle is similar to other metal oxide/metal sulfate cycles in that it uses metal oxide to concentrate electrolytically produced sulfuric acid. The zinc sulfate is precipitated by taking advantage of its retrograde solubility, which allows the recovery of the zinc sulfate as a monohydrate by supplying sensible rather than latent heat. This cycle has been completely demonstrated in the laboratory using recycled materials. Research on the electrochemical step indicates that cell performance goals of 200 mA/cm/sup 2/ at 0.5 volts can be achieved on relatively inexpensive electrode materials with overall cycle efficiencies in excess of 35%.
- Research Organization:
- Institute of Gas Technology, Chicago, IL (USA)
- OSTI ID:
- 7013589
- Report Number(s):
- CONF-820605-25; ON: DE83900087
- Country of Publication:
- United States
- Language:
- English
Similar Records
Novel electrolyte additives to enhance zinc electrode cycle life
Thermochemical hydrogen production. Annual report for 1979
Related Subjects
080102* -- Hydrogen-- Production-- Thermochemical Processes
CHALCOGENIDES
CHEMICAL REACTIONS
HYDROGEN COMPOUNDS
HYDROGEN PRODUCTION
INORGANIC ACIDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
SULFATES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SULFURIC ACID
THERMOCHEMICAL PROCESSES
WATER
ZINC COMPOUNDS
ZINC SULFATES