Wang Shuangshuang, Zhang Liang, Long Chao, Li Aimin
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Road, Nanjing 210023, China.
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Road, Nanjing 210023, China.
J Colloid Interface Sci. 2014 Aug 15;428:185-90. doi: 10.1016/j.jcis.2014.04.055. Epub 2014 May 2.
To enhance adsorption and desorption efficiency of volatile organic compounds from gas streams, we synthesized a series of well-developed micro-mesoporous hypercrosslinked polymeric adsorbents (MM-1, MM-2, and MM-3). The adsorption and desorption performance of dichloromethane and 2-butanone on newly synthesized adsorbents was investigated and compared with commercial micropore-dominated hypercrosslinked polymeric adsorbent (JT-001). The contributions of micropore and mesopore to adsorption and desorption of dichloromethane and 2-butanone on polymeric adsorbents were well elucidated. Consequently, the adsorbent MM-3 had been sorted out with high BET surface area (1606 m(2)/g), large micropore and mesopore volumes (0.562 mL/g and 1.046 mL/g, respectively). The MM-3 exhibited the similar adsorption capacities with JT-001 for dichloromethane and 2-butanone at regions of p/p0<0.2, but had higher adsorption capacities than JT-001 at high relative pressures. The largest adsorption capacities of MM-3 for dichloromethane and 2-butanone at 308 K were 1345.3 mg/g and 853.5 mg/g, respectively, which are about 1.78 and 1.88 times those of JT-001 under the same condition. Furthermore, the MM-3 exhibited higher desorption efficiencies than JT-001, especially for 2-butanone with a higher boiling point.
为提高挥发性有机化合物从气流中的吸附和解吸效率，我们合成了一系列发育良好的微介孔超交联聚合物吸附剂（MM-1、MM-2和MM-3）。研究了二氯甲烷和2-丁酮在新合成吸附剂上的吸附和解吸性能，并与市售以微孔为主的超交联聚合物吸附剂（JT-001）进行了比较。很好地阐明了微孔和介孔对聚合物吸附剂上二氯甲烷和2-丁酮吸附和解吸的贡献。因此，筛选出了具有高BET表面积（1606 m²/g）、大微孔和介孔体积（分别为0.562 mL/g和1.046 mL/g）的吸附剂MM-3。在p/p0<0.2区域，MM-3对二氯甲烷和2-丁酮的吸附容量与JT-001相似，但在高相对压力下，其吸附容量高于JT-001。MM-3在308 K下对二氯甲烷和2-丁酮的最大吸附容量分别为1345.3 mg/g和853.5 mg/g，约为相同条件下JT-001的1.78倍和1.88倍。此外，MM-3的解吸效率高于JT-001，尤其是对于沸点较高的2-丁酮。
