title: Hydrogen production by water dissociation in surface-modified BaCo(x)Fe(y)Zr(1-x-y)O(3-delta) hollow-fiber membrane reactor with improved oxygen permeation.
abstract: A porous perovskite BaCo(x)Fe(y)Zr(0.9-x-y)Pd(0.1)O(3-delta) (BCFZ-Pd) coating was deposited onto the outer surface of a BaCo(x)Fe(y)Zr(1-x-y)O(3-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 CH(4) 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.
authors.affiliation: Institute of Physical Chemistry and Electrochemistry, Leibniz University of Hannover, Callinstr. 3A, 30167 Hannover, Germany. heqing.jiang@pci.uni-hannover.de
authors.forename: Heqing
authors.initials: H
authors.lastname: Jiang
authors.forename: Fangyi
authors.initials: F
authors.lastname: Liang
authors.forename: Oliver
authors.initials: O
authors.lastname: Czuprat
authors.forename: Konstantin
authors.initials: K
authors.lastname: Efimov
authors.forename: Armin
authors.initials: A
authors.lastname: Feldhoff
authors.forename: Steffen
authors.initials: S
authors.lastname: Schirrmeister
authors.forename: Thomas
authors.initials: T
authors.lastname: Schiestel
authors.forename: Haihui
authors.initials: H
authors.lastname: Wang
authors.forename: Jürgen
authors.initials: J
authors.lastname: Caro