Chemistry of inorganic compounds – Oxygen or compound thereof – Water
Patent
1976-10-18
1978-11-21
Vertiz, O. R.
Chemistry of inorganic compounds
Oxygen or compound thereof
Water
423648A, C01B 500
Patent
active
041266676
ABSTRACT:
A process for the exchange of hydrogen isotopes between streams of gaseous hydrogen and liquid water is described, wherein the streams of liquid water and gaseous hydrogen are simultaneously brought into contact with one another and a catalyst packed bed assembly while at a temperature in the range 273.degree. to 573.degree. K. The catalyst packed bed assembly may be composed of discrete carrier bodies of e.g. ceramics, metals, fibrous materials or synthetic plastics with catalytically active metal crystallites selected from Group VIII of the Periodic Table, partially enclosed in and bonded to the carrier bodies by a water repellent, water vapor and hydrogen gas permeable, porous, polymeric material, and discrete packing bodies having an exterior surface which is substantially hydrophilic and relatively non-catalytically active with regard to hydrogen isotope exchange between hydrogen gas and water vapor to that of the catalyst bodies. The catalytically active metal crystallites catalyze the hydrogen isotope exchange reaction between hydrogen gas and water vapor in the presence of liquid water while the polymeric material retards the loss of activity of the catalytically active metal crystallites caused by contact thereof by the liquid water. This catalyzed chemical isotope exchange proceeds simultaneously with isotope exchange from water vapor to liquid water by a non-catalyzed, physical evaporation and condensation exchange reaction and the addition of the discrete hydrophilic packing serves to increase this rate of isotope exchange between the water vapor and the liquid water. In other embodiments the catalyst structure and hydrophilic packing structure comprise a mixture of corrugated and flat metal sheet or gauze or a mixture of corrugated metal sheets or gauze packed or rolled such that fluid flow passage interstices are provided between the sheets and with the catalytically active metal crystallites deposited on some of the metal sheets or gauze.
REFERENCES:
patent: 2690379 (1954-09-01), Urey
patent: 3681021 (1972-08-01), Mikovsky et al.
patent: 3888974 (1975-06-01), Stevens
patent: 4025560 (1977-05-01), Rolston et al.
Butler John P.
DEN Hartog James
Molson Fred W. R.
Atomic Energy of Canada Limited
Langel Wayne A.
Lemon Francis W.
Vertiz O. R.
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