活性炭纤维在低温下对Kr的静态吸附

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

摘要: 研究了粘胶基活性炭纤维(Viscose basedACF,VACF)、沥青基活性炭纤维(Pitch basedACF,PACF)和颗粒活性炭(Grainactivatedcarbon,GAC)在201K时对Kr的静态吸附等温线和吸附速度,并与同样条件下VACF对Xe的吸附进行了比较。结果表明:在201K条件下,VACF对Kr,Xe具有基本相同的平衡吸附容量,但VACF对Kr的吸附速度要大于对Xe的吸附速度。

Abstract: 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.