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采用热重分析仪测量法,测量了超高交联吸附树脂对二氯甲烷(DCM)气体分别在303K,313K和323K下的吸附等温线和静态吸附动力学曲线。采用Dubinin-Astakov方程对吸附等温线进行了拟合,3个温度下的吸附特性曲线拟合结果均较好,表明可以用Polanyi吸附势理论来解释超高交联树脂对二氯甲烷的吸附;用线性推动力模型(LDF)对吸附动力学数据进行拟合分析,拟合相关性(R2>0.99),表明吸附过程主要受颗粒内扩散控制,二氯甲烷的吸附活化能在13.5~18.7kJ/mol范围内。
Thermogravimetric analysis was used to measure the adsorption isotherms and static adsorption kinetics of supercrosslinked resin to dichloromethane (DCM) at 303K, 313K and 323K, respectively. Adsorption isotherms were fitted by Dubinin-Astakov equation. The fitting results of adsorption curves at three temperatures were good, which indicated that the adsorption of dichloromethane by ultra-high cross-linked resin could be explained by Polanyi adsorption potential theory. The linear kinetic model (LDF) was used to fit the kinetic data and the correlation (R2> 0.99) was fitted, indicating that the adsorption process was mainly controlled by intraparticle diffusion. The adsorption activation energy of methylene chloride was between 13.5 and 18.7 kJ / mol range.