Chinese Journal of Chemical Engineering ›› 2019, Vol. 27 ›› Issue (4): 863-868.doi: 10.1016/j.cjche.2018.09.027

• Separation Science and Engineering • Previous Articles     Next Articles

Adsorption/desorption of toluene on a hypercrosslinked polymeric resin in a highly humid gas stream

Bing Zhou1, Bin Sun1, Wenjuan Qiu2, Ying Zhou1, Junqian He1, Xiao'ai Lu1, Hanfeng Lu1   

  1. 1 Institute of Catalytic Reaction Engineering, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China;
    2 College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
  • Received:2018-05-23 Revised:2018-09-26 Online:2019-04-28 Published:2019-06-14
  • Contact: Ying Zhou, Hanfeng Lu;

Abstract: In many sources of volatile organic compounds (VOCs), large amounts of water vapor come from the air and the reactors. The relative humidity (RH) of exhaust gas is normally>60% and is supersaturated. Maintaining the property of adsorbent on VOCs in a highly humid gas stream is a serious industrial problem. In this study, the adsorption/desorption behavior of toluene in a micro-mesoporous polymeric resin was investigated in a highly humid environment to explore the influence of abound water vapor on resin adsorption and regeneration. This resin could selectively adsorb toluene at an RH of 80%, and its adsorption property was unaffected by the presence of water vapor. In the case of humidity saturation, the resin displayed a high adsorption capacity at a moisture content of<30%. Therefore, the polymer resin is an excellent water-resistant adsorbent of VOCs. In the regenerative experiment, the resin maintained its original adsorption capability after four adsorption/desorption cycles of toluene purging with nitrogen gas at 120℃. The resin exhibited excellent regeneration performance at high humidity.

Key words: Adsorption/desorption, volatile organic compounds (VOCs), High humidity, Macromolecule resin