Hydrogen Purification through a Highly Stable Dual-Phase Oxygen-Permeable Membrane
| Autor: | Jia, Lujian, He, Guanghu, Zhang, Yan, Caro, Jürgen, Jiang, Heqing |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Reducing atmosphere
Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie Hydrogen purification hydrogen production Dual phase membranes Reduction of co High temperature Robust stability water splitting Mixed conductivity Oxygen Electronic conductivity ddc:540 Chemical stability mixed conductor Purification Oxygen permeable membranes oxygen-permeable membrane |
| Zdroj: | Angewandte Chemie-International Edition 60 (2021), Nr. 10 Angewandte Chemie-International Edition |
| DOI: | 10.15488/12293 |
| Popis: | Using oxygen permeable membranes (OPMs) to upgrade low-purity hydrogen is a promising concept for high-purity H2 production. At high temperatures, water dissociates into hydrogen and oxygen. The oxygen permeates through OPM and oxidizes hydrogen in a waste stream on the other side of the membrane. Pure hydrogen can be obtained on the water-splitting side after condensation. However, the existing Co- and Fe-based OPMs are chemically instable as a result of the over-reduction of Co and Fe ions under reducing atmospheres. Herein, a dual-phase membrane Ce0.9Pr0.1O2−δ-Pr0.1Sr0.9Mg0.1Ti0.9O3−δ (CPO-PSM-Ti) with excellent chemical stability and mixed oxygen ionic-electronic conductivity under reducing atmospheres was developed for H2 purification. An acceptable H2 production rate of 0.52 mL min−1 cm−2 is achieved at 940 °C. No obvious degradation during 180 h of operation indicates the robust stability of CPO-PSM-Ti membrane. The proven mixed conductivity and excellent stability of CPO-PSM-Ti give prospective advantages over existing OPMs for upgrading low-purity hydrogen. © 2020 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|