Towards Upscaling of La<sub>5.5</sub>WO<sub>11.25−δ</sub> Manufacture for Plasma Spraying-Thin Film Coated Hydrogen Permeable Membranes
Sonia Escolástico,
Cecilia Solís,
Antonio Comite,
Fiorenza Azzurri,
Malko Gindrat,
Stefan Moser,
Johannes Rauch,
Gregory Szyndelman,
Rajiv Damani,
Jose M. Serra
Affiliations
Sonia Escolástico
Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, Avda. Los Naranjos s/n, E-46022 Valencia, Spain
Cecilia Solís
Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, Avda. Los Naranjos s/n, E-46022 Valencia, Spain
Antonio Comite
Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova, 16146 Genoa, Italy
Fiorenza Azzurri
Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova, 16146 Genoa, Italy
Oerlikon Metco AG (Switzerland), 5610 Wohlen, Switzerland
Rajiv Damani
Sulzer Markets and Technology Ltd., 8404 Winterthur, Switzerland
Jose M. Serra
Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, Avda. Los Naranjos s/n, E-46022 Valencia, Spain
Lanthanum tungstate (La6WO12) is a promising material for the development of hydrogen separation membranes, proton ceramic electrolyzer cells and protonic ceramic fuel cells due to its interesting transport properties and stability under different operation conditions. In order to improve the hydrogen transport through the La6WO12 membranes, thin membranes should be manufactured. This work is based on the industrial production of La5.5WO11.25−δ (LWO) powder by spray drying and the manufacturing of thin membranes by low-pressure plasma spraying (LPPS-TF) technique. LPPS-TF allows the production of dense thin films of high quality in an industrial scale. The powders produced by spray drying were morphological and electrochemically characterized. Hydrogen permeation fluxes of a membrane manufactured with these powders were evaluated and fluxes are similar to those reported previously for LWO powder produced in the lab scale. Finally, the transport properties of LWO thin films deposited on Al2O3 indicate that LPPS-TF produces high-quality LWO films with potential for integration in different applications.
