Abstract: The Polanyi-Dubinin equation was used to predict adsorption isotherms for eight organic vapors at 25℃ and for two organic vapors at 25℃, 40℃ and 60℃ on activated carbon in this analysis. The theoretical affinity coefficient, β, was calculated by three methods(molar volume, molecular parachor and electronic polarization) based on nonpolar and polar reference vapors. The corresponding experimental isotherm data were measured by gravimetric method. A comparison between calculated and measured isotherm data showed that ( 1 ) for optimum isotherm prediction, the reference vapor should be similar in polarity to the vapor whose adsorption is to be predicted, ( 2 ) after choosing an appropriate reference vapor, there is essentially no difference in the accuracy of the isotherm predictions by the three methods, ( 3 )the molar volume mth-od is more applicable for predicting isotherms at different temperatures.

摘要： 在用三种方法(摩尔体积、分子等张比容及摩尔电子极化度)计算亲和系数β的基础上,用polanyi-Dubinin方程预计了25℃下八种有机蒸汽以及25、40和60℃下另两种有机蒸气在活性炭上的吸附等温线.相应的实验数据用重量法测定.预计的和实验的数据对比表明:(1)对于优化的预计,参照物应与被预计吸附质有相似的极性;(2)选择适宜的参照物后,三种预计方法在精度上无明显差异;(3)对不同温度下的预计,摩尔体积法更为简便、实用.