用改装的逆流气相色谱仪测定吸附平衡常数

Determination of absorption equilibrium constants by counter-current gas chromatograph

采用逆流气相色谱技术测定了丙酮、乙醇、氯仿、苯、正己烷在GDX—1O1上的吸附平衡常数,吸附熵和吸附焓。对Karaiskakis等人提出的逆流技术测定吸附平衡常数的计算公式进行了修正,使其适用于液体样品。用修正后的公式计算,结果线性关系良好。

A conventional gas chromatograph was adapted into a counter-current gas chromatograph for the measurement of absorption equilibrium constants. The equation for calculating absorption eqilibrium constants given by G. Karaiskakis et al is modifed to suit liquid samples. The absorption equilibrium constants,enthalpies and entropies of acetone.ethyl alcohol,chloroform benzene and hexane on GDX-101 absorbent were determined. The results obtained with the modi-fied equation have good linearity.