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La0.6Sr0.4Co0.2Fe0.8O3−δ microtubular membranes for hydrogen production from water splitting

Lookup NU author(s): Rafael Vilar Franca, Dr Alan Thursfield, Professor Ian Metcalfe

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Abstract

Reactor modules consisting of four gas-tight microtubular membranes made of the mixed oxygen ion and electron conducting perovskite, La0.6Sr0.4Co0.2Fe0.8O3-delta have been tested for oxygen permeation and hydrogen production by membrane-based steam reforming, i.e., simultaneous syngas production coupled with water splitting. The membranes were subjected to two known axial temperature profiles in the temperature of 900 C. The microtubes showed good stability under reaction conditions, operating over a total operation period of ca 400 h of oxygen permeation followed by ca 400 h of steam reforming. An induction period of approximately 30 h was observed before steam reforming commenced. Both the methane and water side outlet gas compositions were measured which allowed for accurate material balance; this indicated that the hydrogen production occurred due to oxygen flux across the membrane and not just surface reaction. Post operation analysis of the microtubes revealed the presence of a strontium enriched dense layer on the water exposed membrane surface and of crystallites enriched with cobalt and sulfur on the methane feed side surface. (C) 2011 Elsevier B.V. All rights reserved.


Publication metadata

Author(s): Franca RV, Thursfield A, Metcalfe IS

Publication type: Article

Publication status: Published

Journal: Journal of Membrane Science

Year: 2012

Volume: 389

Pages: 173-181

Print publication date: 25/10/2011

ISSN (print): 0376-7388

ISSN (electronic): 1873-3123

Publisher: Elsevier BV

URL: http://dx.doi.org/10.1016/j.memsci.2011.10.027

DOI: 10.1016/j.memsci.2011.10.027


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