Zheng Y, Gu T
Department of Chemical Engineering, Ohio University, Athens, Ohio, 45701
J Colloid Interface Sci. 1998 Oct 15;206(2):457-463. doi: 10.1006/jcis.1998.5733.
A modified two-dimensional van der Waals equation model was proposed for the prediction of multicomponent gas-solid adsorption isotherms from corresponding single-component adsorption equilibrium data. The model was used to predict adsorption isotherms of CO-CO2 mixtures and CO2-N2 mixtures on Cu(I)-NaY zeolite. Experimental adsorption equilibrium data of the two systems were compared with results calculated from the model and three other models in the literature: the ideal adsorbed solution model, the vacancy solution theory of adsorption using the Flory-Huggins activity coefficient equation, and the two-dimensional van der Waals equation. The results indicated that the modified van der Waals equation predicted the experimental results better than the three other models for the two systems studied, especially for the CO-CO2 system, which involved chemical reaction during adsorption and exhibited azeotropic behavior. Copyright 1998 Academic Press.
提出了一种改进的二维范德华方程模型，用于从相应的单组分吸附平衡数据预测多组分气固吸附等温线。该模型用于预测CO-CO2混合物和CO2-N2混合物在Cu(I)-NaY沸石上的吸附等温线。将这两个系统的实验吸附平衡数据与由该模型以及文献中的其他三个模型计算得到的结果进行了比较：理想吸附溶液模型、使用弗洛里-哈金斯活度系数方程的吸附空位溶液理论以及二维范德华方程。结果表明，对于所研究的两个系统，改进的范德华方程比其他三个模型能更好地预测实验结果，特别是对于CO-CO2系统，该系统在吸附过程中涉及化学反应并表现出共沸行为。版权所有1998年学术出版社。
