Abstract

The purity of hydrogen, which is an alternative energy carrier in powder sources of distributed energy resource systems and, in particular, is the feed stock for fuel cells, should be no less than 99.9999 vol % purity High-purity hydrogen can be prepared only via its separation as a result of selective diffusion through metallic membranes manufactured from specific membrane palladium-based alloys prepared in the form of thin foils. In the present work, the combination of deformation and annealings under different conditions is used to prepare the Pd–7.70 wt % Lu alloy in the form of foil 50 µm thick, whose specific hydrogen permeability is studied in the course of cyclic heating and cooling in a hydrogen atmosphere in a temperature range of 300–500°С. The Pd–7.70 wt % Lu membrane is shown to demonstrate high and stable hydrogen permeability. The evolution of the surface structure of the membrane in the course of its operation in the hydrogen atmosphere is studied by atomic force microscopy using the phase contrast mode.

中文翻译：

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膜Pd–7.70 wt％的Lu合金，用于氢气的制备和纯化

摘要

氢的纯度应不低于99.9999 vol％，它是分布式能源系统粉末资源中的替代能源载体，尤其是燃料电池的原料，纯度应不低于99.9999 vol％。其分离是由于选择性扩散通过以薄箔形式制备的特定膜钯基合金制成的金属膜而引起的。在目前的工作中，结合不同条件下的变形和退火来制备厚度为50 µm的箔形式的Pd–7.70 wt％的Lu合金，在循环加热和冷却过程中研究了其比氢渗透率。在300-500°С温度范围内的氢气氛中。Pd–7.70 wt％的Lu膜显示出高而稳定的氢渗透性。