低温吸附法分离氦气流中氢同位素的实验研究  

Recovery of hydrogen isotopes from helium gas stream by cryogenic adsorption method

作　　者：钟正坤[1] 邢丕峰[1] 王昌斌[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,绵阳621900

出　　处：《核技术》2003年第6期436-439,共4页Nuclear Techniques

摘　　要：采用穿透曲线法研究了液氮温度下活性炭、碳分子筛和碳纳米纤维对氢同位素的吸附等温线和同位素效应。结果表明:活性炭和碳分子筛都是良好的吸附剂,碳纳米纤维对氢同位素的吸附量太低而不具备工程应用的可能性。实验还对吸附剂进行了改性处理,考察了改性吸附剂对氢同位素的吸附性能。Cryogenic adsorption of hydrogen isotopes on porous adsorbents is an attractive method for tritium re-covery from helium which conducts as sweep gas of tritium breeding blanket in a fusion reactor. In order to use this method to extract tritium effectively, it is necessary to investigate adsorption properties of various candidate adsorb-ents. In this study isotherms and isotopic effects of hydrogen isotopes on three carbonaceous adsorbents: carbon mo-lecular sieve, activated carbon and carbon nano-fiber have been tested at liquid nitrogen temperature. It was con-cluded that the first two adsorbents could be used for this purpose and the third one was excluded because of its low adsorption capacity. Adsorbent modification using concentrated HNO3 and experimental results of the modified ad-sorbents have also been reported.

关 键 词：低温吸附 氢同位素 吸附等温线 同位素效应 吸附剂改性 

分 类 号：TL278[核科学技术—核燃料循环与材料]