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Development of Pd-based double-skinned membranes for hydrogen production in fluidized bed membrane reactors
Journal of Membrane Science ( IF 9.5 ) Pub Date : 2018-03-01 , DOI: 10.1016/j.memsci.2017.10.064
Alba Arratibel , Alfredo Pacheco Tanaka , Iker Laso , Martin van Sint Annaland , Fausto Gallucci

Abstract This paper reports the preparation and performance characterization of new PdAg supported membranes with a porous protecting layer to protect the membrane surface from particles in a fluidized bed membrane reactor. Supported membranes with a selective layer of 1 µm and a protective layer have been prepared. Outstanding H2 permeance (5·10−6 mol m−2 s−1 Pa−1) and H2/N2 perm-selectivity (over 25,000) were measured at 400 °C and 1 bar of pressure difference. One membrane has been tested for more than 750 h in the presence of fluidized glass beads showing a decay in the perm-selectivity to approximately 5000, mainly due to sealing leakage. However, the protective layer was removed during this long-term test. Another membrane has been tested for more than 2000 h in a fluidized bed membrane reactor with a Rh reforming catalyst supported on promoted alumina in the bubbling fluidization regime. During tests with binary mixtures mass transfer limitations toward the membrane were observed due to large H2 permeance of the membranes.

中文翻译:

用于流化床膜反应器制氢的钯基双层膜的开发

摘要 本文报道了新型 PdAg 支撑膜的制备和性能表征,该膜具有多孔保护层,可保护膜表面免受流化床膜反应器中颗粒的影响。已经制备了具有 1 µm 选择性层和保护层的支撑膜。在 400 °C 和 1 bar 压差下测量了出色的 H2 渗透率(5·10-6 mol m-2 s-1 Pa-1)和 H2/N2 渗透选择性(超过 25,000)。一种膜在存在流化玻璃珠的情况下测试了超过 750 小时,显示出渗透选择性衰减到大约 5000,这主要是由于密封泄漏。然而,在这个长期测试期间,保护层被去除了。另一种膜已在流化床膜反应器中进行了超过 2000 小时的测试,其中 Rh 重整催化剂负载在鼓泡流化状态下的促进氧化铝上。在使用二元混合物进行测试期间,由于膜的 H2 渗透性大,观察到对膜的传质限制。
更新日期:2018-03-01
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