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放射性氙测量通常采用碳分子筛等吸附剂进行吸附分离以提高探测灵敏度,但空气中CO_2的存在会降低吸附剂的吸附性能,同时增大吸附柱的体积、降低气体回收率,因此在氙吸附前需要去除空气中的CO_2。该文研究了不同的沸石分子筛的CO_2除杂性能,测试分析了不同操作条件对除杂性能的影响。结果表明:13XHP沸石分子筛对CO_2的除杂性能较好,温度和CO_2的体积分数对吸附剂性能的影响最为显著,柱前压力和气体流量分别在103~353kPa和564~2 015mL/min的范围内对吸附剂性能影响不大。
Radioactive xenon measurements usually use carbon molecular sieves and other adsorbents for adsorption and separation to improve the detection sensitivity. However, the existence of CO 2 in the air will reduce the adsorption capacity of the adsorbent and increase the volume of the adsorption column and reduce the gas recovery rate. Therefore, before xenon adsorption Need to remove the air in the CO_2. In this paper, we studied the CO 2 removal performance of different zeolites, and analyzed the influence of different operating conditions on the removal performance. The results show that 13XHP zeolite has the best performance for the removal of CO_2. The temperature and volume fraction of CO_2 have the most significant influence on the performance of the adsorbent. The pressure and flow rate of the column are 103 ~ 353kPa and 564 ~ 2015mL / min Little effect on the performance of the adsorbent.