High-Performance Microchanneled Asymmetric Gd(0.1)Ce(0.9)O(1.95-δ)-La(0.6)Sr(0.4)FeO(3-δ)-Based Membranes for Oxygen Separation

ACS Applied Materials & Interfaces
Shiyang ChengChusheng Chen

Abstract

A microchanneled asymmetric dual phase composite membrane of 70 vol % Gd(0.1)Ce(0.9)O(1.95-δ)-30 vol % La(0.6)Sr(0.4)FeO(3-δ) (CGO-LSF) was fabricated by a "one step" phase-inversion tape casting. The sample consists of a thin dense membrane (100 μm) and a porous substrate including "finger-like" microchannels. The oxygen permeation flux through the membrane with and without catalytic surface layers was investigated under a variety of oxygen partial pressure gradients. At 900 °C, the oxygen permeation flux of the bare membrane was 1.6 (STP) ml cm(-2) min(-1) for the air/He-case and 10.10 (STP) ml cm(-2) min(-1) for the air/CO-case. Oxygen flux measurements as well as electrical conductivity relaxation show that the oxygen flux through the bare membrane without catalyst is limited by the oxygen surface exchange. The surface exchange can be enhanced by introduction of catalyst on the membrane surface. An increase of the oxygen flux of ∼1.49 (STP) mL cm(-2) min(-1) at 900 °C was observed when catalyst is added for the air/He-case. Mass transfer polarization through the finger-like support was confirmed to be negligible, which benefits the overall performance. A stable flux of 7.00 (STP) ml cm(-2) min(-1) was observed between air/C...Continue Reading

References

Nov 6, 2003·Angewandte Chemie·Chu-Sheng ChenHenny J M Bouwmeester
Sep 10, 2004·Nature·Zongping Shao, Sossina M Haile
Jan 13, 2011·Angewandte Chemie·Huixia LuoJürgen Caro
Oct 18, 2013·ACS Applied Materials & Interfaces·Zhongtao WangWei Liu
Jun 6, 2014·ACS Applied Materials & Interfaces·Kaveh PartoviJürgen Caro
Mar 26, 2015·Chemical Communications : Chem Comm·S ChengP V Hendriksen
Jun 18, 2015·ACS Applied Materials & Interfaces·Jong Hoon JooJi Haeng Yu

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Citations

May 27, 2017·ACS Applied Materials & Interfaces·Beom Tak NaJong Hoon Joo
Jun 21, 2018·ACS Applied Materials & Interfaces·Valery V Belousov, Sergey V Fedorov

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