采用热重分析仪测量法,测量了超高交联吸附树脂对二氟甲烷(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Dubinm-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氟甲烷的吸附;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(R^2〉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。
Adsorption of dichloromethane (DCM) vapor onto hypercrosslinked polymeric resin was investigated using thermogravimetric analyzer (TGA). Static adsorption equilibrium and adsorption kinetics were studied at 303K, 313K and 323K, respectively. Dubinin-Astakov equation was used to correlate the experimental data at different temperatures and good fitting results were obtained, which indicated that Polanyi adsorption potential theory can explain the adsorption of DCM well. Adsorption kinetics data were well correlated with linear driving force (LDF) model (R2〉 0.99). In addition, the activation energy was calculated to be 13.5-18.TkJ/mol for the adsorption of DCM on hypercrosslinked polymeric adsorbent.