| 초록 |
A simple and reliable technique for predicting the pure gas adsorption equilibria is presented. This plain method is based on the assumption that the quantity of the isosteric heat of adsorption is not depends on temperature for a certain surface loading. To evaluate the isosteric heat of adsorption, the Clausius-Clapeyron equation for adsorption is employed. Prediction based on this method requires only two sets of the experimental isotherm data at two different temperatures. The Clausius-Clapeyron equation with two isotherms provides reliable prediction results of adsorption equilibrium relationships at unknown temperatures. In order to verify the validity of the proposed method, numerous adsorption systems of hydrocarbons on hydrophobic zeolite Y have been evaluated. Our results showed that the proposed method gives good agreement with a high accuracy, within the range of temperature for the system tested. Furthermore, this method can be utilized to predict the equilibrium relationships for complicated adsorption systems such as Type IV or V isotherms which was classified by Brunauer et al.. The another important application of proposed method is that it could be easily applied to study the column dynamics since it has a succinct mathematical formula.
|
