Hydrogen Permeation Performance of Ni-BaZr_0.1Ce_0.7Y_0.2O_3-δ Metal-Ceramic Hollow Fiber Membrane

A dense Ni-BaZr_0.1Ce_0.7Y_0.2O_3-δ (BZCY) cermet hollow fiber is fabricated by sintering NiO-BZCY hollow fiber precursors prepared by phase inversion method in 5%H₂/95%Ar and its hydrogen permeation performance is investigated. The Ni-BZCY hollow fiber membrane possesses a “sandwich” structure. Finger-like structures are observed near both the inner and outer surfaces, while a dense layer is present in the center part. With 200 mL/min wet 20%H₂/80%N₂ on the shell side and 150 mL/min high purity Ar on the core side, the hydrogen permeation flux through the Ni-BZCY hollow fiber membrane at 900 oC is 0.53 μmol/cm²s. Owing to a high packing density, the hydrogen permeation flux per unit volume is greatly improved and membrane components composed of an assembly of hollow fibers may be applied in industrial hydrogen separation.