Thermochemical generation of hydrogen

Details Thermochemical generation of hydrogen Thermochemical generation of hydrogen

1980-04-30

1982-02-09

Vertiz, O. R.

Chemistry of inorganic compounds

Oxygen or compound thereof

203 12, 422186, 422198, 422235, 423539, 423540, 423542, 423648R, C01B 1300

Patent

active

043149847

ABSTRACT:
The direct fluid contact heat exchange with H.sub.2 SO.sub.4 at about 330.degree. C. prior to high temperature decomposition at about 830.degree. C. in the oxygen release step of several thermochemical cycles for splitting water into hydrogen and oxygen provides higher heat transfer rates, savings in energy and permits use of cast vessels rather than expensive forged alloy indirect heat exchangers. Among several candidate perfluorocarbon liquids tested, only perfluoropropylene oxide polymers having a degree of polymerization from about 10 to 60 were chemically stable, had low miscibility and vapor pressure when tested with sulfuric acid at temperatures from 300.degree. C. to 400.degree. C.

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