The adsorption excess isotherms of ethanol–water and propanol–water mixtures are studied on a series of carbon molecular sieves with well-separated micro- and mesoporosity at 298.15 K. The preferential adsorption of one component from a mixture is measured by using vibration densitometry for the concentration analysis. Microcalorimetrically measured enthalpies, which are released upon immersion of the carbon materials in the binary mixtures, complement the adsorption excess data. It is shown that (i) density measurements are well applicable for studying liquid-phase adsorption, (ii) liquid-adsorption isotherms are sensitive to smallest chain length differences of the adsorptives, (iii) the calculated separation diagrams depend strongly on the assumptions about the adsorbed phase, and (iv) the combined determination of gas, vapor and liquid adsorption isotherms and immersion enthalpies offers advantages for the analysis of complex adsorption systems.

在一系列具有良好分离的微孔和中孔的碳分子筛上研究了乙醇-水和丙醇-水混合物的吸附过量等温线，温度为 298.15 K。通过使用振动光密度法测量混合物中一种组分的优先吸附浓度分析。将碳材料浸入二元混合物中时释放的微量热测量焓补充了吸附过量数据。结果表明（i）密度测量非常适用于研究液相吸附，（ii）液体吸附等温线对吸附剂的最小链长差异敏感，（iii）计算的分离图强烈依赖于假设吸附相，和 (iv) 气体的组合测定，