TY - JOUR

T1 - Hydrogen Purification through a Highly Stable Dual-Phase Oxygen-Permeable Membrane

AU - Jia, Lujian

AU - He, Guanghu

AU - Zhang, Yan

AU - Caro, Jürgen

AU - Jiang, Heqing

N1 - Funding Information: This work was financially supported by National Natural Science Foundation of China (21676284, 51761145107), the Director Innovation Fund of Key Laboratory of Biofuels, Chinese Academy of Sciences (grant Y57201190V), and QIBEBT and Dalian National Laboratory For Clean Energy (DNL), CAS (Grant QIBEBT 2019000126). The authors gratefully thank Mr. S. Ashtiani for his kind help. Open access funding enabled and organized by Projekt DEAL.

PY - 2021/2/22

Y1 - 2021/2/22

N2 - 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.

AB - 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.

KW - hydrogen production

KW - mixed conductor

KW - oxygen-permeable membrane

KW - water splitting

UR - http://www.scopus.com/inward/record.url?scp=85100557670&partnerID=8YFLogxK

U2 - 10.1002/anie.202010184

DO - 10.1002/anie.202010184

M3 - Article

C2 - 32924212

AN - SCOPUS:85100557670

VL - 60

SP - 5204

EP - 5208

JO - Angewandte Chemie - International Edition

JF - Angewandte Chemie - International Edition

SN - 1433-7851

IS - 10

ER -