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.