Method For Permeation Extraction of Hydrogen From an Enclosed Volume

Method For Permeation Extraction of Hydrogen From an Enclosed Volume

A method by which a gold-coated palladium foil, singly or in combination with metal oxides, can be made to permanently remove hydrogen gas from an attached vacuum chamber, either electrically-passive or electrically-active has been discovered. The foil assembly (301) is secured onto a demountable or...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: BIERMAN JOHN C, KIRBY ROBERT E, MULHOLLAN GREGORY A
Format: Patent
Sprache:eng
Schlagworte:
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
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Beschreibung
Zusammenfassung:A method by which a gold-coated palladium foil, singly or in combination with metal oxides, can be made to permanently remove hydrogen gas from an attached vacuum chamber, either electrically-passive or electrically-active has been discovered. The foil assembly (301) is secured onto a demountable or permanently affixed flange (303), through which hydrogen gas passes via permeation (102), from the vacuum chamber being pumped (401), to atmosphere. Palladium combined with a metal oxide (502), secondary metal layer (503), gold coating (504) and an applied voltage (509) increases the pumping speed. Methods associated with this claim include the foil mounting and sealing, configuring film composition and applying requisite bias voltage.