School of Chemical Engineering and Light Industry, Guangdong University of Technology, No. 100 Waihuan Xi Road, Panyu District, Guangzhou, 510006, People's Republic of China.
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, No. 2 Nengyuan Road, Tianhe District, Guangzhou, 510640, People's Republic of China.
Chemosphere. 2020 Jan;239:124732. doi: 10.1016/j.chemosphere.2019.124732. Epub 2019 Aug 31.
A polar modified post-cross-linked poly (divinylbenzene-co-ethyleneglycol-dimethacrylate) (PCL-PDE) resin was synthesized by suspension polymerization of ethylene glycol dimethacrylate (EGDMA) and divinylbenzene (DVB), and a post-cross-linked reaction. After characterization, the adsorption behaviors of 5-hydroxymethylfurfural (5-HMF) on PCL-PDE resin were determined in comparison with the starting copolymers PDE resin. The equilibrium adsorption capacity of 5-HMF on PCL-PDE resin was much larger than PDE resin and the increase rate was greater than 52.6%. The equilibrium data of 5-HMF onto PCL-PDE resin were found to be better fitted by the Langmuir isotherm model. The kinetic data shows that the adsorption reached equilibrium in a short time (less than 20 min) can be fitted by the pore diffusion model (PDM) at various operating conditions. The effective pore diffusion coefficient was dependent upon adsorption temperature, and were 6.706 × 10, 8.958 × 10, 1.136 × 10 and 1.429 × 10 m s at 288, 298, 308 and 318 K, respectively. Furthermore, the effects of feed flow rate (Q = 0.6, 1.5, 3.0 and 6.0 mL min) and initial 5-HMF concentration (c = 0.52, 1.02, 2.00 and 4.96 g L) on the adsorption were investigated systematically. Besides, a general rate model (GRM) was used to predict adsorption breakthrough curves of 5-HMF. The simulation results are highly consistent with the experimental data, indicating that the GRM can successfully simulate this process. In the desorption process, the desorption capacity reaches 99.6% of adsorbed capacity, suggesting that the PCL-PDE resin exhibited good reusability. Therefore, it could be suggested that the PCL-PDE resin has a potential application in the separation and purification of 5-HMF.
通过悬浮聚合乙二醇二甲基丙烯酸酯（EGDMA）和二乙烯基苯（DVB）以及后交联反应，合成了一种极性修饰的后交联聚（二乙烯基苯-共聚-乙二醇二甲基丙烯酸酯）（PCL-PDE）树脂。在进行了表征之后，测定了 5-羟甲基糠醛（5-HMF）在 PCL-PDE 树脂上的吸附行为，并与起始共聚物 PDE 树脂进行了比较。PCL-PDE 树脂对 5-HMF 的平衡吸附容量远大于 PDE 树脂，增长率大于 52.6%。5-HMF 平衡吸附数据更符合朗缪尔等温线模型。动力学数据表明，在各种操作条件下，吸附在短时间（小于 20min）内达到平衡，可以用孔扩散模型（PDM）拟合。有效孔扩散系数取决于吸附温度，分别为 288、298、308 和 318K 时为 6.706×10、8.958×10、1.136×10 和 1.429×10m/s。此外，还系统研究了进料流速（Q=0.6、1.5、3.0 和 6.0mL/min）和初始 5-HMF 浓度（c=0.52、1.02、2.00 和 4.96gL）对吸附的影响。此外，还使用了一般速率模型（GRM）来预测 5-HMF 的吸附穿透曲线。模拟结果与实验数据高度一致，表明 GRM 可以成功地模拟这一过程。在解吸过程中，解吸容量达到吸附容量的 99.6%，表明 PCL-PDE 树脂具有良好的可重复使用性。因此，可以认为 PCL-PDE 树脂在 5-HMF 的分离和纯化方面具有潜在的应用价值。
