Abstract: The adsorption equilibria of C8 aromatics in diethyl benzene were studied by the dynamic method. The adsorption isotherms of paraxylene, orthoxylene, ethylbenzene at 170℃ were determined from the breakthrough curves. Theadsorption isotherms of para- and orthoxylene mixture were determined as well. It turned out that the isotherms follow Henrys law when the concentration is less than 3.0mol/l. The adsorption of two-solute solution can be predicted from the isotherms of the single-solute solution by Radke-Prausnitzs two-dimensional ideal dilute solution theory. The Polanyis adsorption potential theory was used to describe the adsorption equilibria of the paraxylene-diethylbenzene system. The calculated adsorption isotherm at 110℃ from the adsorption data at 170℃ agrees well with the experimental results.

摘要： 本文以连续流动单管的实验装置,研究了C_8芳烃的单溶质和双溶质在二乙苯溶液中的液相吸附平衡.从测定穿透曲线出发,作出了对二甲苯、邻二甲苯、乙苯、对二甲苯-邻二甲苯等系统在170℃下的吸附等温线.发现当溶质浓度<3.0mo1/1时,吸附等温线符合Henry定津,且双溶质溶液的吸附量可按Radke-Praus Nitz的二维理想稀溶液理论由单溶质吸附等温线进行预测.将Polanyi吸附势理论延伸应用于C_8芳烃的液相吸附.用170℃下pX-DEB系统的吸附平衡数据作出特性曲线,可预测110℃下pX-DEB系统的吸附等温线.并用动态法测定的数据,验证了上述推导.