为了解杂质气体对钯柱氢氘排代性能的影响程度,利用快排代法考察了排代氢中添加CO,O2,CH4,CO2等气体后室温下钯柱氢氘排代效率的变化情况,并测量了钯表面O2,CO,CH4的等温吸附曲线.结果表明:H2中仅加入10 μL/L的CO,排代性能已显著下降,随CO含量的增加,排代性能随之显著降低,当CO含量增至3000 μL/L时将几乎没有排代效果;O2的影响比CO弱,H2中含3000 μL/L的O2时排代性能约下降20%;然而当H2中含3000 μL/L的CO2时排代性能约下降3.2%;CH4的影响则相对可忽略.
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