... are classified into two categories—continuous migration and noncontinuous hopping. The self-diffusion coefficients of the hydroxoniums and the water molecules in the membrane were evaluated to be 3.476 × 10 − 5 cm 2 ∕ s and 4.993 × 10 − 5 cm 2 ∕ s respectively, based on the Einstein relation. The calculated self...

... heat of reaction self-diffusion The development of cost effective ceramic membranes is of considerable interest for many high temperature solid state applications such as sensors, high purity oxygen separation, and the partial oxidation of hydrocarbons ( 1 ). The latter is considered...