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Membranes 2012, 2(3), 665-686; doi:10.3390/membranes2030665
Article

Investigation of La1−xSrxCrO3− (x ~ 0.1) as Membrane for Hydrogen Production

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Received: 1 August 2012; in revised form: 24 August 2012 / Accepted: 28 August 2012 / Published: 11 September 2012
(This article belongs to the Special Issue Membrane Processes and Energy)
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Abstract: Various inorganic membranes have demonstrated good capability to separate hydrogen from other gases at elevated temperatures. Hydrogen-permeable, dense, mixed proton-electron conducting ceramic oxides offer superior selectivity and thermal stability, but chemically robust candidates with higher ambipolar protonic and electronic conductivity are needed. In this work, we present for the first time the results of various investigations of La1−xSrxCrO3− membranes for hydrogen production. We aim in particular to elucidate the material’s complex transport properties, involving co-ionic transport of oxide ions and protons, in addition to electron holes. This opens some new possibilities for efficient heat and mass transfer management in the production of hydrogen. Conductivity measurements as a function of pH2 at constant pO2 exhibit changes that reveal a significant hydration and presence of protons. The flux and production of hydrogen have been measured under different chemical gradients. In particular, the effect of water vapor in the feed and permeate gas stream sides was investigated with the aim of quantifying the ratio of hydrogen production by hydrogen flux from feed to permeate and oxygen flux the opposite way (“water splitting”). Deuterium labeling was used to unambiguously prove flux of hydrogen species.
Keywords: hydrogen transport membrane; proton permeation; oxygen permeation; water splitting hydrogen transport membrane; proton permeation; oxygen permeation; water splitting
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Larring, Y.; Vigen, C.; Ahouanto, F.; Fontaine, M.-L.; Peters, T.; Smith, J.B.; Norby, T.; Bredesen, R. Investigation of La1−xSrxCrO3− (x ~ 0.1) as Membrane for Hydrogen Production. Membranes 2012, 2, 665-686.

AMA Style

Larring Y, Vigen C, Ahouanto F, Fontaine M-L, Peters T, Smith JB, Norby T, Bredesen R. Investigation of La1−xSrxCrO3− (x ~ 0.1) as Membrane for Hydrogen Production. Membranes. 2012; 2(3):665-686.

Chicago/Turabian Style

Larring, Yngve; Vigen, Camilla; Ahouanto, Florian; Fontaine, Marie-Laure; Peters, Thijs; Smith, Jens B.; Norby, Truls; Bredesen, Rune. 2012. "Investigation of La1−xSrxCrO3− (x ~ 0.1) as Membrane for Hydrogen Production." Membranes 2, no. 3: 665-686.



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