低温等离子体对几种常见挥发性有机物的净化性能研究

目的 以低温等离子体净化器为依托，研究低温等离子体对甲苯、丙酮、乙酸乙酯和四氯化碳四种挥发性有机物的净化性能。
方法 通过单一组分挥发性有机物体系和双组分挥发性有机物体系进行净化率和净化动力学的研究。
结果 在单一组分挥发性有机物体系中，四种物质的净化率在300 min时均达到90%以上，各物质的净化动力学曲线符合指数方程C_t=C₀·e-kt，净化速率呈现出四氯化碳>甲苯>丙酮=乙酸乙酯的规律。在双组分挥发性有机物混合体系（丙酮、乙酸乙酯）中，相同条件下低温等离子体净化器对任一组分的净化率均低于单一组分，且各组分的净化存在竞争关系，相比于乙酸乙酯，净化器对丙酮的净化显示出更高的速率。
结论 低温等离子体对几种挥发性有机物的净化效果明显，净化速率快，该技术可为工作场所空气中挥发性有机物的高效净化提供依据。

Study on Purification of volatile organic compounds with non-thermal plasma

Objective To investigate the purification performance of four volatile organic compounds (VOCs), i.e., toluene, acetone, ethyl acetate and carbon tetrachloride, with non-thermal plasma. Methods The degree and kinetics of purification were studied in both single VOC system and two-component VOC system. Results In single VOC system, the purification degree of the four substances were all above 90% after 300 min, and the kinetic curves of the four substances fitted well with the exponential equation C_t=C₀·e-kt. The purification rate showed in order of higher to lower as carbon tetrachloride, toluene, acetone and ethyl acetate. In the two-component VOC mixtures (acetone and ethyl acetate) studied, the purifying degree of any one component was lower than that of the single component. There was a competitive inhibition of purifying rate between two components. Purification of acetone was higher than that of ethyl acetate. Conclusion Low temperature plasma has obvious purification effect on several volatile organic compounds, and the purification rate is fast. This technology can provide a basis for efficient purification of volatile organic compounds in the air of workplaces.