Enhanced adsorption and desorption of VOCs vapor on novel micro-mesoporous polymeric adsorbents.
Enhanced adsorption and desorption of VOCs vapor on novel micro-mesoporous polymeric adsorbents.
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DOI：
10.1016/j.jcis.2014.04.055
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发表时间：
2014-08
影响因子：
9.9
通讯作者：
Shuangshuang Wang;Liang Zhang;Chao Long;Aimin Li
中科院分区：
文献类型：
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作者：
Shuangshuang Wang;Liang Zhang;Chao Long;Aimin Li
为了提高气体中挥发性有机化合物的吸附和解吸效率，我们合成了一系列成熟的微介孔高交联聚合物吸附剂（MM-1、MM-2和MM-3）。研究了新合成的吸附剂对二氯甲烷和2-丁酮的吸附和解吸性能，并与市售的微孔为主的高交联聚合物吸附剂（JT-001）进行了比较。阐述了微孔和中孔对二氯甲烷和2-丁酮在高分子吸附剂上的吸附和解吸的作用。结果表明，分离得到的吸附剂MM-3具有较高的BET比表面积（1606 m2/g）、较大的微孔和中孔体积（分别为0.562 mL/g和1.046 mL/g）。MM-3在p/p0< 0.2区域对二氯甲烷和2-丁酮的吸附量与JT-001相似，但在高压下的吸附量高于JT-001。在308 K条件下，MM-3对二氯甲烷和2-丁酮的最大吸附量分别为1345.3 mg/g和853.5 mg/g，分别是JT-001的1.78和1.88倍。此外，MM-3的解吸效率高于JT-001，特别是对沸点较高的2-丁酮的解吸效率更高。
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 m2/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 ofp/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.