Chinese Journal of Chemical Engineering ›› 2019, Vol. 27 ›› Issue (10): 2383-2389.doi: 10.1016/j.cjche.2018.12.019

• Separation Science and Engineering • Previous Articles     Next Articles

Concentration control of volatile organic compounds by ionic liquid absorption and desorption

Xiaobin Ma1, Minyan Wu1, Shuo Liu2, Jinxing Huang2, Bin Sun1, Ying Zhou1, Qiulian Zhu1, Hanfeng Lu1   

  1. 1 Institute of Catalytic Reaction Engineering, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China;
    2 Hangzhou Runxin Technology Co. Ltd., Hangzhou 310014, China
  • Received:2018-11-26 Revised:2018-12-24 Online:2019-10-28 Published:2020-01-17
  • Contact: Hanfeng Lu
  • Supported by:
    Supported by the Zhejiang University Students Science and Technology Innovation Activity Plan Funding (No. 2018R403078).

Abstract: Volatile organic compounds (VOCs) are difficult to be eliminated safely and effectively because of their large concentration fluctuations. Thus, maintaining a stable concentration of VOCs is a significant study. In this research, H2O, Tween-80,[Emim]BF4,[Emim]PF6, and[Hnmp]HSO4 were applied to absorb and desorb simulated VOCs. The ionic liquid[Emim]BF4 demonstrated the best performance and was thus selected for further experiments. As the ionic liquid acted as a buffer, the toluene concentration with a fluctuation of 2000-20000 mg·m-3 was stabilized at 6000-12000 mg·m-3. Heating distillation (90℃) was highly efficient to recover[Emim]BF4 from toluene. The regenerated[Emim]BF4 could retain its initial absorption capacity even after multiple cycles. Moreover,[Emim]BF4 had the same buffer function on various aromatic hydrocarbons.

Key words: Volatile organic compounds, Concentration fluctuation, Absorb and desorb, Ionic liquid, Buffer