Study on the Static Adsorption Performance of ACF for Kr at Low Temperature

The static adsorption isotherms and adsorption rates of krypton and xenon at 201 K on viscose-based activated carbon fibres(VACF),pitch-based ACF(PACF),and granular activated carbon (GAC) are measured on a Micromeritics ASAP 2010M specific surface area and pore size distribution instrument by changing working gas of the instrument from N_2 to krypton or xenon. The results show that VACF has the same equilibrium adsorption capacity, but different adsorption rates for krypton and xenon.Because of the difference in their adsorption rates,sampling or concentration of krypton and xenon with VACF may lead to an alternation in their molar ratios.