氙在活性炭和碳分子筛上的动态吸附性能

Dynamic Adsorption Property of Xenon on Activated Carbon and Carbon Molecular Sieves

为筛选氙的吸附剂,研究了氙在活性炭和碳分子筛(CMS)上的动态吸附性能,探讨了氙浓度、气流比速、温度、载气、压力和CO2等对氙动态吸附系数的影响。结果表明,CMS1对氙的吸附能力最强,其次为CMS2;低于10-5mol/L的氙浓度、实验气流比速以及5×10-5mol/L以下的CO2浓度对氙动态吸附系数影响不明显;载气种类和高于5×10-5mol/L的CO2浓度对氙的动态吸附系数有一定影响;吸附温度和吸附压力对氙动态吸附系数影响较大。提高吸附剂吸附氙能力的方法主要是降低吸附温度和增加吸附压力。

In order to select well adsorptive xenon adsorbent,the dynamic adsorption property of xenon on activated carbon and carbon molecular sieves（CMS） was studied by measuring the xenon dynamic adsorption coefficient as a function of velocity of gas,temperature,carrier gas,pressure and concentration of CO2.The results show that the highest value of xenon dynamic adsorption coefficient is on CMS1,and the second highest value is on CMS2;when the xenon concentration is less than 10-5 mol/L or concentration of CO2 is less than 5×10-5 mol/L,the xenon dynamic adsorption coefficient nearly keeps constant at the specific experimental flow rate.Then the xenon dynamic adsorption coefficient would vary when it was mixed with different kind of carrier gas and become less at more than 5×10-5 mol/L concentration of CO2.And the maximal effect factors are temperature and pressure.Therefore,the feasible measures to improve the xenon capability are to cool the adsorbent and increase adsorption pressure.