PROCESS FOR THE EXCHANGE OF HYDROGEN ISOTOPES BETWEEN STREAMS OF GASEOUS HYDROGEN LIQUID WATER AND CATALYST
A process and catalyst for the exchange of hydrogen isotopes between streams of gaseous hydrogen and liquid water is described, wherein the streams are brought into contact with one another and a catalyst assembly at a temperature in the range 273 to 573K, the catalyst assembly comprises an inherent...
Gespeichert in:
Hauptverfasser: | , , , , |
---|---|
Format: | Patent |
Sprache: | eng ; fre |
Schlagworte: | |
Online-Zugang: | Volltext bestellen |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | A process and catalyst for the exchange of hydrogen isotopes between streams of gaseous hydrogen and liquid water is described, wherein the streams are brought into contact with one another and a catalyst assembly at a temperature in the range 273 to 573K, the catalyst assembly comprises an inherently hydrophobic, porous, polytetrafluoroethylene matrix and partially platinized carbon particles in the weight ratio of 0.5:1 to 6:1 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 vapour 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 vapour to liquid water by a non-catalyzed, physical evaporation and condensation exchange reaction. The efficient coupling of the 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 catalyst is dependent upon the weight ratio of the catalytically active platinized carbon to the polytetrafluoroethylene matrix being in the range 0.5:1 to 6:1 and for best results preferably in the range 1:1 to 3:1. |
---|