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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Hydrogen trapping properties of Zr-based intermetallic compounds in the presence of CO contaminant gas
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Hydrogen trapping properties of Zr-based intermetallic compounds in the presence of CO contaminant gas

机译：CO污染气体存在下Zr基金属互化物的氢捕获性能

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摘要

Intermetallic compounds, as hydrogen getters, are considered to control the quantity of hydrogen gen?erated in radioactive waste packaging. The compounds ZrCo, Zr_2Fe and a Zr-rich Zr-Ti-V alloy have been chosen as they form very stable hydrides at ambient temperature. However, other gases are produced in the packaging such as carbon monoxide, a gas known to poison the surface of intermetallic compounds and to hinder the hydrogen sorption reaction. The three Zr-based compounds have been first character?ized regarding their metallurgical state and their gas sorption properties toward pure hydrogen. Then, the sorption properties of the activated materials have been studied using a mixture of 5vol.% CO+95 vol.% H_2. We demonstrated that though the presence of CO sharply slows down the reaction rate the activated compounds still show significant sorption properties. Therefore, the presence of contaminant gases is not detrimental for the target application.
机译：金属间化合物作为吸氢剂被认为可以控制放射性废物包装中产生的氢气量。选择了化合物ZrCo，Zr_2Fe和富含Zr的Zr-Ti-V合金，因为它们在环境温度下会形成非常稳定的氢化物。但是，包装中还会产生其他气体，例如一氧化碳，一氧化碳已知会毒化金属间化合物的表面并阻碍氢吸附反应。三种基于Zr的化合物的特征在于其冶金状态和对纯氢的气体吸附特性。然后，已经使用5体积％CO + 95体积％H_2的混合物研究了活化材料的吸附性能。我们证明，尽管CO的存在会大大降低反应速度，但活化的化合物仍显示出显着的吸附性能。因此，污染物气体的存在对目标应用无害。

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