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H2 purification through BaCe0.65Zr0.20Y0.15O3-¿-Ce0.85Gd0.15O2-¿ ceramic dual-phase membrane

AuthorsMortalò, C.; Rebollo, Elena CSIC ORCID ; Escolástico, S.; Deambrosis, S. M.; Pistidda, C.; Miorin, E.; Montagner, F.; Zin, V.; Serra Alfaro, José Manuel ; Leonelli, C.; Fabrizio, M.
Issue Date12-Feb-2020
Citation2nd Congress of the Interdivisional Group on Chemistry for Renewable Energy of the Italian Chemical Society – SCI (2020)
AbstractBaCe0.65Zr0.20Y0.15O3-δ-Ce0.85Gd0.15O2-δ (BCZ20Y15-GDC15) dual-phase material is currently one of the most promising dense ceramic membrane for H2 separation and purification at T > 600 °C. Indeed, this composite material reached H2 permeability values among the highest ever reported for mixed protonic and electronic conductor (MIEC) membranes (≥ 0.3 mL·min-1 ·cm2 at 750°C). 1, 2 A selective H2 separation and purification is allowed through BCZ20Y15- GDC15 membrane by incorporating it into the crystal structure of its constituents as charge protonic defects and electrons/holes that are transported to the opposite side of the membrane under a H2 partial pressure gradient, thus providing a non-galvanic separation, i.e. without external power. 3 Besides the H2 permeability performances, it shows also a good chemical stability under harsh reducing conditions and under CO2- and H2S- containing atmospheres. 5, 6 This talk provides a comprehensive overview of the recent results reached by our group in such MIEC material for H2 separation. The preparation method, hydrogen permeability and longterm stability of the BCZ20Y15-GDC15 composite system under reducing harsh environments will be discussed. In-situ synchrotron XRD analyses under H2 atmospheres will be also shown.
DescriptionTrabajo presentado en el 2nd Congress of the Interdivisional Group on Chemistry for Renewable Energy of the Italian Chemical Society – SCI, celebrado en Padova (Italia), del 12 al 14 de febrero de 2020.
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