新型等离子体与光催化复合空气净化技术研究

目的 研究一种新型的等离子体-光催化复合空气净化技术.方法 采用三氯乙烯气体作为空气污染物对等离子体单元和光催化单元进行复合试验,选择等离子体加光催化或光催化加等离子体两种复合方式、改变两者之间的距离以及在其间放置网状物,检测其对三氯乙烯的净化效率.结果 等离子体加光催化复合方式具有明显协同效应,而且在两者的单独净化效率较低时更明显;两者间距在32.5 cm时净化效率可以达到90%以上;放置网状物对其净化效率都具有影响,放置不锈钢网时降解率为76.3%,放置无纺布时降解率为79.2%.结论 采用等离子体加光催化的复合方式、保持合适的间距,并放置适当材料的网,具有较显著的协同促进效应,可提高净化技术的复合效应.

Study on Air Purification by Plasma Combined With Photocatalysis

Objective To develop a new technique of air purification by plasma combined with photocatalysis. Methods Taken trichloroethylene as the air pollutant, the combined tests of the plasma unit and photocatalysis unit were conducted in different ways of combination (plasma and photocatalysis, photocatalysis and plasma) by adjusting the distance and setting some nets between them, then the purify efficiency was evaluated. Results The way of combination (plasma and photocatalysis) showed the best purify efficiency, when the distance was 32.5 cm, purify efficiency was more than 90%, steel net could increase purify efficiency by 6%, non-woven fabric by 9%. Conclusion The combined usage of plasma and photocatalysis, keeping a fit distance and setting a net of special material, may produce a considerable synergistic effect in air purification.