An investigation was made of the permeation of H, through 3N5-purity Pd membranes, by using steady-state permeation conditions and inlet and outlet pressure measurements. At temperatures ranging from 300 to 709K, and pressures ranging from 2.9 x 10-5 to 5 x 10-3cmHg, the diffusion data obeyed:

D (cm2/s) = 4.94 x 10-3 exp[-5.745(kcal/mol)/RT]

S.A.Koffler, J.B.Hudson, G.S.Ansell: Transactions of the AIME, 1969, 245[8], 1735-40