Modeling of hydrogen permeation for Ni-ceramic proton conductor composite membrane with symmetric structure

▸ A model of Ni-BZCY composite membrane for hydrogen separation is generated. ▸ Rate limiting step between surface exchange and bulk diffusion is determined. ▸ Hydrogen flux originating from nickel phase is considered in composite membrane. ▸ Bulk diffusion coefficient of doped proton conductor can be simply estimated. ▸ The model exhibits good agreement with the experiment.