活性炭纤维对NH_3的吸附研究 Ⅰ PAN-ACF孔径结构对NH_3静态吸附的影响

THE ADSORPTION OF AMMONIA ONTO PANACFSⅠ THE INFLUNCE OF PORE STRUCTURE OF PANACF ONSTATIC ADSORPTION OF AMMONIA

探讨了在较高氨分压下，活性炭纤维（ＡＣＦ）对于极性吸附质氨的吸附过程，证明在此过程中，ＡＣＦ孔径结构的重要性。初步讨论了不同的孔径结构下的不同的吸附行为。

The static adsorption behavior of NH3 on the surface of ACFs with different pore structures was studied at relatively high partial pressure of adsorbate. Based on the experimental results, the adsorption process can be divided into two or more stages, and different stage is connected with different mechanism. At the first stage, the ammonia molecules fill in the ultramicropores according to micropore filling mechanism, which is effected greatly by ultramicropore structures, e.g. pore size distribution. At the second stage, the adsorption behavior is attributed to the specific surface area of pores larger than 0.8nm and the monolayer adsorption mechanism acts in this subprocess.