Catalytically active mass for the exchange of hydrogen isotopes between streams of gaseous hydrogen and liquid water

Patent · Tue Oct 14 00:00:00 EDT 1980

OSTI ID:6580933

Butler, J P; Goodale, J W; Hartog, J D; Molson, F W; Rolston, J H

For the exchange of hydrogen isotopes between streams of gaseous hydrogen and liquid water, wherein the streams are at a temperature in the range 273 to 573K are brought into contact with one another and a catalytically active mass, an improved catalytically active mass is provided comprising an inherently hydrophotic, porous, polytetrafluoroethylene matrix and partially platinized carbon particles dispersed throughout the whole of the porous polytetrafluoroethylene matrix in the weight ratio of 1:1 to 3:1 of polytetrafluoroethylene to partially platinized high surface area carbon particles. The inherently hydrophobic, porous , polytetrafluoroethylene matrix allows the catalytically active metal to catalyze the hydrogen isotope exchange reaction between hydrogen gas and water vapor in the presence of liquid water while retarding loss of activity of the catalytically active metal by contact of the metal catalyst with liquid water. This catalyzed chemical isotope exchange proceeds simultaneously with isotope exchange from water vapor to liquid water by a noncatalyzed, physical evaporation and condensation exchange reaction. The efficient coupling of these two isotopic transfer steps which results in a rapid overall isotopic exchange between hydrogen and liquid water without a pronounced loss of activity of the catalytically active mass is dependent upon the weight ratio of the catalytically active platinized carbon to the polytetrafluoroethylene matrix being in the above mentioned range of 1:1 to 3:1.

• Assignee: Atomic Energy Of Canada Ltd (Canada)
• Patent Number(s): US 4228034
• OSTI ID: 6580933
• Resource Relation: Patent Priority Date: Priority date 25 Jun 1976, Canada
• Country of Publication: United States
• Language: English

Related Subjects

07 ISOTOPES AND RADIATION SOURCES
HEAVY WATER
PRODUCTION
HYDROGEN ISOTOPES
ISOTOPIC EXCHANGE
CARBON
CATALYSTS
POLYTETRAFLUOROETHYLENE
ELEMENTS
FLUORINATED ALIPHATIC HYDROCARBONS
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROGEN COMPOUNDS
ISOTOPES
NONMETALS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
POLYETHYLENES
POLYMERS
POLYOLEFINS
WATER
070101* - Heavy Water Production