Absorption of hydrogen isotopes by Pd–Pt alloys
Absorption of hydrogen isotopes by Pd–Pt alloys
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Pd-Pt 合金对氢同位素的吸收
DOI：
10.1016/s0925-8388(99)00438-7
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发表时间：
1999
影响因子：
6.2
通讯作者：
Kuniaki Watanabe
中科院分区：
文献类型：
--
作者：
T. Yasumatsu;J. Wan;M. Matsuyama;Kuniaki Watanabe
为了在室温下无任何替代气体的气相色谱氢同位素分离中寻找更有利的工作材料，研究了Pd-Pt合金在0-10 at组成范围内的氢吸收和氢化物形成的热力学性质。% Pt，温度范围为273 ~ 493 K， H/M为2×10−4 ~ 0.65。测定了h22和D2的无限稀释吸收热和氢化物生成。结果表明，合金的吸收热和氢化物生成随合金中Pt含量的增加而降低，平衡压力比定义的同位素效应随合金成分的变化不大。这意味着本研究中使用的任何合金都可以根据所需的操作条件选择作为工作材料，而不会显著改变分离效率。
In the search for more profitable working materials for the recently developed gas chromatographic hydrogen isotope separation operated around room temperature without any replacement gas, thermodynamic properties of Pd–Pt alloys for hydrogen absorption and hydride formation were studied in the composition range 0–10 at.% Pt, the temperature range 273–493 K, and with a H/M from 2×10−4to 0.65. The heat of absorption at infinite dilution and hydride formation were determined for H2and D2. The results showed that both the heat of absorption and hydride formation decreased with increasing Pt content in the alloy and the isotope effect defined by the ratio of equilibrium pressures did not change much with alloy composition. It is implied that any alloy used in the present study could be selected as a working material depending on the required operation conditions without significant change in the separation efficiency.