双掺杂钨酸镧 (La0.83Eu0.17)5.5W0.8Re0.2O11.25-δ混合导体透氢膜研究
Study of mixed conducting hydrogen permeable membrane based Eu-and Re co-doped tungsten lanthanum material (La0.83Eu0.17)5.5W0.8Re0.2O11.25-δ
随着氢能源的发展,一种基于质子-电子混合导体透氢膜材料受到人们的普遍关注。混合导体透氢膜是一种在高温下同时具有质子导电性和电子导电性的无机致密陶瓷膜，在高温还原气氛下化学性质稳定，对氢气的选择性高，其中，钨酸镧材料因质子导电率和电子导电率高，且能在富CO2环境中稳定存在而受到关注，但是其透氢量不能满足工业实际需要。为了提高钨酸镧材料的透氢量，对钨酸镧（La5.5WO11.25-δ，LWO）材料进行双掺杂，La位与W位分别掺杂铕(Eu)与铼（Re）。首先，采用EDTA-柠檬酸络合法合成(La0.83Eu0.17)5.5W0.8Re0.2O11.25-δ（LEWR），采用X射线衍射法（XRD）对合成的粉体进行了表征及分析，表明合成的LEWR为立方萤石型结构，用等静压法制备出致密的LEWR片状膜并对膜的透氢性能进行了测试，发现双掺杂LEWR的透氢性能有所提高，在1000oC时透氢量达到0.096 ml/minocm2。
With the development of hydrogen energy, materials based on mixed proton-electron conducting hydrogen permeable membrane have received universal attention. Mixed conducting hydrogen permeable membrane, a kind of inorganic dense ceramic membrane with proton and electron conductivity at the same time, has good chemical stability under reducing atmosphere at a high temperature and high selectivity of hydrogen, among which lanthanum tungstate material holds people's wide interests due to its high proton conductivity and electronic conductivity and excellent stability in CO2 rich environment. However, the hydrogen permeation flux of lanthanum tungsten is not high enough to meet the practical industrial needs. In order to improve its hydrogen permeation performance, we synthesis europium (Eu) and rhenium (Re) double-doped tungsten lanthanum material (La0.83Eu0.17)5.5W0.8Re0.2O11.25-δ(LEWR), where La has been partially replaced by Eu and W by Re. The hydrogen permeation properties of LEWR membranes have been improved. At 1500 C, the hydrogen permeation flux has reached 0.096 ml/(minocm2) under dry atmosphere.
周 胜、王海辉、侯嘉敏、庄丽彬、陈 莉
氢能、氢能利用金属元素无机化合物化学工业电化学工业
膜分离透氢双掺杂钨酸镧
membrane separationhydrogen permeationco-dopedtungsten lanthanum
周 胜,王海辉,侯嘉敏,庄丽彬,陈 莉.双掺杂钨酸镧 (La0.83Eu0.17)5.5W0.8Re0.2O11.25-δ混合导体透氢膜研究[EB/OL].(2015-12-10)[2025-08-16].http://www.paper.edu.cn/releasepaper/content/201512-579.点此复制
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