Chen Guoxing, Zhao Zhijun, Widenmeyer Marc, Yan Ruijuan, Wang Ling, Feldhoff Armin, Weidenkaff Anke
Department of Materials and Earth Sciences, Technische Universität Darmstadt, Alarich-Weiss-Str. 2, 64287 Darmstadt, Germany.
Institute of Physical Chemistry and Electrochemistry, Leibniz University Hannover, Callinstr. 3A, 30167 Hannover, Germany.
Membranes (Basel). 2020 Aug 12;10(8):183. doi: 10.3390/membranes10080183.
Dense, H- and CO-resistant, oxygen-permeable 40 wt % CePrO-60 wt % NdSrFeCuOdual-phase membranes were prepared in a one-pot process. These Nd-containing dual-phase membranes have up to 60% lower material costs than many classically used dual-phase materials. The CePrO-NdSrFeCuO sample demonstrates outstanding activity and a regenerative ability in the presence of different atmospheres, especially in a reducing atmosphere and pure CO atmosphere in comparison with all investigated samples. The oxygen permeation fluxes across a CePrO-NdSrFeCuO membrane reached up to 1.02 mL min cm and 0.63 mL min cm under an air/He and air/CO gradient at = 1223 K, respectively. In addition, a CePrO-NdSrFeCuO membrane (0.65 mm thickness) shows excellent long-term self-healing stability for 125 h. The repeated membrane fabrication delivered oxygen permeation fluxes had a deviation of less than 5%. These results indicate that this highly renewable dual-phase membrane is a potential candidate for long lifetime, high temperature gas separation applications and coupled reaction-separation processes.
采用一锅法制备了致密、耐H和CO、透氧性良好的40 wt% CePrO-60 wt% NdSrFeCuO双相膜。这些含钕双相膜的材料成本比许多传统使用的双相材料低多达60%。与所有研究样品相比，CePrO-NdSrFeCuO样品在不同气氛下，特别是在还原气氛和纯CO气氛中表现出优异的活性和再生能力。在1223 K下，在空气/He和空气/CO梯度下，穿过CePrO-NdSrFeCuO膜的氧渗透通量分别达到1.02 mL min cm和0.63 mL min cm。此外，CePrO-NdSrFeCuO膜（厚度0.65 mm）在125 h内表现出优异的长期自愈稳定性。重复制备的膜的氧渗透通量偏差小于5%。这些结果表明，这种高度可再生的双相膜是长寿命、高温气体分离应用和耦合反应-分离过程的潜在候选材料。
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