基于氢同位素研究商用钯银合金膜的渗氚性能  

Tritium Permeation Performance with Pd/Ag Alloy Membrane Based on Hydrogen Isotope

作　　者：黄豫[1,2] 韩兴博[1] 姚剑[1] 王广华[1] 吴小玲[1] 钱楠[1] 吴胜伟[1] 刘卫[1] HUANG Yu HAN Xing-bo YAO Jian WANG Guang-hua WU Xiao-ling QIAN Nan WU Sheng-wei LIU Wei(Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China University of Chinese Academy of Sciences, Beijing 100049, China)

机构地区：[1]中国科学院上海应用物理研究所,上海201800 [2]中国科学院大学,北京100049

出　　处：《原子能科学技术》2017年第8期1494-1499,共6页Atomic Energy Science and Technology

摘　　要：钯银合金膜可用于熔盐堆尾气中气态氚(HT和T_2)的分离与纯化。本文研究了厚度为80μm的钯银合金膜在纯H_2气氛中及Ar气存在下对H_2的分离效果。结果表明,渗氢过程中氢原子在膜内部的体相扩散是控制速率的关键。Ar气存在时,在钯银合金膜工作温度为480℃、混合气体进气流速为100mL/min、氢分压差为20~100kPa的条件下,钯银合金膜对H_2气的渗透通量随氢分压差的增大而增加,随Ar气浓度的升高而减小。在氢分压差相同的条件下,纯氢的渗透通量明显高于Ar-H_2混合气的渗透通量,说明钯银合金膜受Ar气的影响分离效果变差。渗氢后的钯银合金膜表面变得光滑,有晶界形成。Pd/Ag alloy membrane can be used to separate and purify HT/T2 from the offgas of TMSR.In this paper,a Pd/Ag alloy membrane with thick of 80μm was chosen to separate H2,which can simulate the separation of tritium.The separation effect of Pd/Ag alloy membrane in pure H2 and H2-Ar gas mixture was studied.The results indicate that the diffusion of atomic hydrogen through a membrane is the controlling mechanism and rate determine step of hydrogen permeation.In the condition of H2-Ar gas mixture,the H2 permeation flux reduces remarkably due to the influence of concentration polarization of Ar.Through the analysis of the membrane surface under SEM,the ratio of Pd in the alloy membrane increases and the grain boundary can be found,which could be inferred to the influence of H2 permeation.

关 键 词：钯银合金膜 气态氚 氢分压差 压力指数 渗透通量 

分 类 号：TQ138.2[化学工程—无机化工]