二组分气体在固体上吸附的研究（Ⅵ）──不同覆盖度下的二组分气体在灯黑上的吸附

Studies on Binary Gas Solid Adsorption(Ⅵ)──Binary Gas Adsorption on Lamp Black with Different Surface Coverages

通过测定不同覆盖度下的甲苯－正己烷、苯－正己烷、丙酮－正已烷和正戊烷－正己烷４个二组分气体在灯黑上的组成吸附等温线，发现它们有着共同的规律：随着覆盖度的增加，各体系的组成吸附等温线都向上靠近它们各自的气液平衡曲线。因此，基本上可以把二组分的气相与吸附相的平衡看成二组分的气液平衡，４个体系的组成吸附等温线基本上都可以通过理想溶液的相对挥发度方程式模拟得到。

The composition adsorption isotherms(ya￣xg curve) for toluene-n-hexane, benzene-n-hexane,acetone-n-hexane and n-pentane-n-hexane vapor mixutres on lamp black with different surface coverages(θ)at 25℃ were measured.The experimental results indicate that the ya￣xg curves approach gradually up to their binary liquid vapor equilibrium curve with increasing surface coverage. Therefore,the binary gas phase and adsorption phase at equilibrium are similarly with the binary gas liquid phase equilibrium.The composition adsorption isotherms of the four binary gases adsorption on lamp black systems are in accordancl with simulated equation of relative volatility.