Uses of Palladium Hydride
The absorption of hydrogen is reversible and is highly selective. Industrially a palladium-based diffuser separator is used. Impure gas is passed through tubes of thin walled silver-palladium alloy. Protium and deuterium readily diffuse through the alloy membrane. The gas that comes through is pure and ready for use. Palladium is alloyed with silver to improve its strength. To ensure that the formation of the beta phase is avoided, as the lattice expansion noted earlier would cause distortions and splitting of the membrane, the temperature is maintained above 300 °C.
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