摘要
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°C)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.
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 °C） 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.
基金
Supported by the Zhejiang University Students Science and Technology Innovation Activity Plan Funding(No.2018R403078).
