碳分子筛上氪、氙的动态吸附及脱附性能

为筛选快速分离Kr/Xe的材料，研究了不同碳分子筛（CMS）对氙（Xe）和氪（Kr）的动态吸附性能与脱附性能，探讨了压力、气体流量、温度等因素对Kr、Xe的动态吸附系数与脱附率的影响。结果表明，碳分子筛Aladdin TDX-01对Xe的吸附容量最大，其次为光复TDX-01，低温时，Aladdin TDX-01对Kr的动态吸附系数大于光复TDX-01。Aladdin TDX-01碳分子筛对Kr和Xe的吸附能力均随压力升高而增强，随着原料气流量增加而减少，动态吸附系数随着温度升高而降低；采用N2吹扫对Kr、Xe进行脱附，随着N₂流量增大、温度升高，Kr、Xe的脱附时间缩短。Aladdin TDX-01碳分子筛在25 ℃、100 kPa条件下对Xe的动态穿透吸附系数为1 283 mL/g，在-50 ℃、100 kPa条件下对Kr的动态穿透吸附系数为474 mL/g。

Dynamic Adsorption and Desorption of Krypton and Xenon on Carbon Molecular Sieve

In order to screen the materials for quick separation of Kr and Xe, the dynamic adsorption and desorption capability of different carbon molecular sieves(CMS) for Kr and Xe were studied, and the influence of pressure, gas flow, temperature and other factors on the dynamic adsorption coefficient and desorption of Kr and Xe were discussed. The results show that the adsorption capacity of Aladdin TDX-01 to Xe is the greatest, followed by Guangfu TDX-01. At low temperature, the dynamic adsorption coefficient of Aladdin TDX-01 to Kr is greater than that of Guangfu TDX-01. The adsorption capacity of Aladdin TDX-01 carbon molecular sieve for Xe and Kr increases with the increase of pressure, but decreases with the increase of carrier gas flow rate, and the dynamic adsorption coefficient decreases with the increase of temperature; the desorption time of Kr and Xe is shortened with the increase of flow rate of nitrogen and temperature. The dynamic penetration adsorption coefficient of Xe on Aladdin TDX-01 carbon molecular sieve is 1 283 mL/g at 25 ℃ and 100 kPa, while that for Kr is 474 mL/g at -50 ℃ and 100 kPa.