Factors Limiting the Apparent Hydrogen Flux in Asymmetric Tubular Cercer Membranes Based on La27W3.5Mo1.5O55.5−δ and La0.87Sr0.13CrO3−δ

Membranes

JonathanM. Polfus¹  Wen Xing¹  Marie-Laure Fontaine¹  Rune Bredesen¹  Zuoan Li¹  Christelle Denonville¹ 

[1] SINTEF Industry, Thin Film and Membrane Technology, P.O. Box 124 Blindern, NO-0314 Oslo, Norway;

关键词: hydrogen permeation;    water splitting;    surface kinetics;    asymmetric tubular membrane;    lanthanum tungstate;    lanthanum chromite;   

DOI  :  10.3390/membranes9100126

来源: DOAJ

【 摘 要 】

Asymmetric tubular ceramic−ceramic (cercer) membranes based on La₂₇W_3.5Mo_1.5O_55.5−δ-La_0.87Sr_0.13CrO_3−δ were fabricated by a two-step firing method making use of water-based extrusion and dip-coating. The performance of the membranes was characterized by measuring the hydrogen permeation flux and water splitting with dry and wet sweep gases, respectively. To explore the limiting factors for hydrogen and oxygen transport in the asymmetric membrane architecture, the effect of different gas flows and switching the feed and sweep sides of the membrane on the apparent hydrogen permeability was investigated. A dusty gas model was used to simulate the gas gradient inside the porous support, which was combined with Wagner diffusion calculations of the dense membrane layer to assess the overall transport across the asymmetric membrane. In addition, the stability of the membrane was investigated by means of flux measurements over a period of 400 h.

【 授权许可】

Unknown