Journal
CHINESE JOURNAL OF CHEMICAL ENGINEERING
Volume 18, Issue 3, Pages 506-510Publisher
CHEMICAL INDUSTRY PRESS
DOI: 10.1016/S1004-9541(10)60250-9
Keywords
zirconium dopant; mixed conductivity; hydrogen permeation; perovskite
Categories
Funding
- NSFC-Guangdong [U0834004]
- National Natural Science Foundation of Guangdong Province [20976057]
- Natural Science Foundation of Guangdong Province [06025657]
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Zr-substituted, Tm-doped SrCeO3 (SrCe0.95-xZrxTm0.05O3-delta, 0 <= x <= 0.40) were synthesized via citrate complexing method, and the membranes of SrCe0.95-xZrxTm0.05O3-delta were prepared by pressing followed by sintering. X-ray diffraction (XRD) was used to characterize the phase structure of sintered membrane. The microstructure of the sintered membranes was studied by scanning electron microscopy (SEM). Protonic and electronic conductivities were measured under different circumstance. Hydrogen permeation through the SrCe0.75Zr0.20Tm0.05O3-delta membranes was carried out using gas permeation setup. Hydrogen permeation fluxes (J(H2)) of the SrCe0.75Zr0.20Tm0.05O3-delta membrane reach up to 0.042 ml.min(-1).cm(-2) at H-2 partial pressure of 0.4 x 10(5) Pa at 900 degrees C. The hydrogen permeation fluxes (J(H2)) obtained in this paper are slightly lower than that of SrCe0.95Tm0.05O3-delta on the same orders, and Zr doping can increase chemical stability of the SrCe0.75Zr0.20Tm0.05O3-delta membranes.
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