High CO2 resistance of indium-doped cobalt-free 60 wt.%Ce0.9Pr0.1O2-δ-40 wt.%Pr0.6Sr0.4Fe1-xInxO3-δ oxygen transport membranes
High CO2 resistance of indium-doped cobalt-free 60 wt.%Ce0.9Pr0.1O2-δ-40 wt.%Pr0.6Sr0.4Fe1-xInxO3-δ oxygen transport membranes
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DOI：
10.1016/j.ceramint.2021.09.117
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发表时间：
2021-11-17
影响因子：
5.2
通讯作者：
Luo, Huixia
中科院分区：
文献类型：
--
作者：
Huang, Yanhao;Zhang, Chao;Luo, Huixia
氧传输膜（OTM）在富氧燃烧的气体分离和碳中和方面具有巨大的应用前景。在本文中，该家族60 wt.% Ce0.9Pr0.1O2-δ-40重量%采用Pechini法成功制备了Pr_（0.6）Sr_（0.4）Fe_（1-x）In_xO_（3-δ）（CPO-PSF_（1-x）I_xO，x = 0.01，0.025，0.05，0.075，0.1）无钴双相铟掺杂金属离子电致发光薄膜。系统地研究了这些OTM的相结构、表面形貌、元素分布、透氧性和长期运行稳定性。其中，CPO-PSF 0. 99 I 0. 01 O在1000 ℃、空气/He梯度和空气/CO2梯度下的最佳透氧通量分别为1.07 mL min（-1）·cm（-2）和0.80 mL min（-1）·cm（-2）。同时，以纯CO2为吹扫气，CPO-PSF 0. 99 I 0. 01 O在1000 ℃下100 h稳定保持在0.80 mL min（-1）.cm（-2）.采用XRD、SEM和EDS等分析手段研究了经长时间透氧反应后的OTM的表面元素分布和相结构，发现经长时间透氧反应后的OTM与新鲜膜的结构和成分基本相同，表明In掺杂的OTM具有良好的CO2耐受性。这些OTM的合适的铟替代铁不仅改善了氧渗透性，而且保持了材料的长期反应稳定性。
The oxygen transport membrane (OTM) has huge application prospects in gas separation and carbon neutralization based on oxygen enriched combustion. In this paper, the family 60 wt.%Ce0.9Pr0.1O2-delta-40 wt.% Pr0.6Sr0.4Fe1-xInxO3-delta (CPO-PSF1-xIxO, x = 0.01, 0.025, 0.05, 0.075, 0.1) cobalt-free dual-phase MIEC OTMs doped with indium have been successfully prepared by Pechini method. The phase structure, surface morphology, element distribution, oxygen permeability, and long-term operation stability of these OTMs are systematically explored. Among these OTMs, the champion oxygen permeable flux of CPO-PSF0.99I0.01O reaches 1.07 mL min(-1).cm(-2) and 0.80 mL min(-1).cm(-2) at 1000 degrees C under air/He gradient and air/CO2 gradient. Meanwhile, CPO-PSF0.99I0.01O maintains the value of 0.80 mL min(-1).cm(-2) steadily at 1000 degrees C for 100 h when pure CO2 as the sweep gas. The surface element distribution and phase structure of the OTMs after long-term oxygen permeability reaction are investigated by XRD, SEM combining with EDS, where the spent membranes retain the same structure and component as the fresh membranes, demonstrating that the In-doped OTMs have an excellent CO2 tolerance. Suitable indium substitution for iron of these OTMs not only improves the oxygen permeability, but also maintains the long-term reaction stability of the material.