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用重量法测试了CoAlPO4 5分子筛对甲苯的吸附.结果表明,不同温度下的吸附等温线均属典型Ⅰ型,可以用Langmuir方程来描述.甲苯的吸附自由能变化随吸附量的增加而增加;吸附熵随吸附量的增加而减小,在吸附量大于0.65mmol/g时变化较大,表明吸附相中分子间的相互作用开始加强;吸附熵与吸附温度无关.
The adsorption of toluene on CoAlPO4 5 zeolite was investigated by gravimetric method. The results showed that the adsorption isotherms at different temperatures are typical type Ⅰ and can be described by Langmuir equation. The adsorption free energy of toluene increases with the increase of adsorption amount. The adsorption entropy decreases with the increase of the adsorption amount, and changes greatly when the adsorption amount is greater than 0.65 mmol / g, indicating that the intermolecular interaction in the adsorbed phase begins to increase. The entropy of adsorption has nothing to do with the adsorption temperature.