Hydrogen production by water dissociation in surface-modified BaCo _xFe_yZr_1-x-yO_3-δ hollow-fiber membrane reactor with improved oxygen permeation

verfasst von

Heqing Jiang, Fangyi Liang, Oliver Czuprat, Konstantin Efimov, Armin Feldhoff, Steffen Schirrmeister, Thomas Schiestel, Haihui Wang, Jürgen Caro

Abstract

A porous perovskite BaCo_x,Fe_yZr _0.9-x-yPd_0.1O_3-δ (BCFZ-Pd) coating was deposited onto the outer surface of a BaCO_xFe_yZr _1-x-yO_3-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 mLH₂min ^-1VCm^-2 at 950°C after depositing a BCFZ-Pd porous layer onto the BCFZ membrane.

Organisationseinheit(en)

Institut für Physikalische Chemie und Elektrochemie

Externe Organisation(en)

Thyssenkrupp AG
Fraunhofer-Institut für Grenzflächen- und Bioverfahrenstechnik (IGB)
South China University of Technology

Typ

Artikel

Journal

Chemistry - A European Journal

Band

16

Seiten

7898-7903

Anzahl der Seiten

6

ISSN

0947-6539

Publikationsdatum

12.07.2010

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Katalyse, Organische Chemie

Ziele für nachhaltige Entwicklung

SDG 7 – Erschwingliche und saubere Energie

Elektronische Version(en)

https://doi.org/10.1002/chem.200902494 (Zugang: Geschlossen)