【摘 要】
：
Volatile organic compounds (VOCs) are difficult to be eliminated safely and effectively because of their large con-centration fluctuations. Thus, maintaining a
【机 构】
：
Institute of Catalytic Reaction Engineering, College of Chemical Engineering, Zhejiang University of
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Volatile organic compounds (VOCs) are difficult to be eliminated safely and effectively because of their large con-centration 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. More-over, [Emim]BF4 had the same buffer function on various aromatic hydrocarbons.
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