期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 16, 期 26, 页码 7898-7903出版社
WILEY-BLACKWELL
DOI: 10.1002/chem.200902494
关键词
heterogeneous catalysis; hollow-fiber membranes; oxygen separation; perovskite phases; water splitting
资金
- BMBF [03C0343A]
A porous perovskite BaCoxFeyZr1-x-yO3-delta (BCFZ-Pd) coating was deposited onto the outer surface of a BaCoxFeyZr1-x-yO3-delta (BCFZ) perovskite hollow-fiber membrane. The surface morphology of the modified BCFZ fiber was characterized by scanning electron microscopy (SEM), indicating the formation of a BCFZ-Pd porous layer on the outer surface of a dense BCFZ hollow-fiber membrane. The oxygen permeation flux of the BCFZ membrane with a BCFZ-Pd porous layer increased 3.5 times more than that of the blank BCFZ membrane when feeding reactive CH4 onto the permeation side of the membrane. The blank BCFZ membrane and surface-modified BCFZ membrane were used as reactors to shift the equilibrium of thermal water dissociation for hydrogen production because they allow the selective removal of the produced oxygen from the water dissociation system. It was found that the hydrogen production rate increased from 0.7 to 2.1 mL H-2 min(-1) cm(-2) at 950 degrees C after depositing a BCFZ-Pd porous layer onto the BCFZ membrane.
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