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Hydrogen Production by Water Dissociation in Surface‐Modified BaCoxFeyZr1−x−yO3−δ Hollow‐Fiber Membrane Reactor with Improved Oxygen Permeation |
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| Authors: | Heqing Jiang Dr. Fangyi Liang Oliver Czuprat Konstantin Efimov Armin Feldhoff Dr. Steffen Schirrmeister Dr. Thomas Schiestel Dr. Haihui Wang Prof. Jürgen Caro Prof. |
| Affiliation: | 1. Institute of Physical Chemistry and Electrochemistry, Leibniz University of Hannover, Callinstr. 3A, 30167 Hannover (Germany), Fax: (+49)?511‐76219121;2. Uhde GmbH, Friedrich‐Uhde‐Str. 15, 44141 Dortmund (Germany);3. Fraunhofer Institute of Interfacial Engineering and Biotechnology (IGB), Nobelstr 12, 70569 Stuttgart (Germany);4. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640 (PR China) |
| Abstract: | A porous perovskite BaCoxFeyZr0.9?x?yPd0.1O3?δ (BCFZ‐Pd) coating was deposited onto the outer surface of a BaCoxFeyZr1?x?yO3?δ (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 H2 min?1 cm?2 at 950 °C after depositing a BCFZ‐Pd porous layer onto the BCFZ membrane. |
| Keywords: | heterogeneous catalysis hollow‐fiber membranes oxygen separation perovskite phases water splitting |