等离子体TiO_2催化空气净化试验研究

为了既能够很好地除尘,又能有效地降解挥发性有机物(VOCs),并能灭菌消毒,提出了一种集3个功能于一体的等离子体放电催化室内空气净化技术。在模拟室内对3种不同的放电催化区进行了甲醛的净化试验。试验结果表明,等离子体放电催化降解甲醛的反应过程符合一级动力学规律;等离子体放电催化协同作用降解甲醛的效果明显优于等离子体单独作用;正极性放电降解甲醛的效果明显优于负极性放电;甲醛降解速率与电压近似呈线性关系;纳米TiO2显著降低了放电产生的臭氧体积分数。

Experimental study of air cleaning using a plasma with TiO_2 catalyst

An indoor air cleaning method using plasma with catalyst was developed to effectively remove dust, volatile organic compounds (VOCs) and viruses. Three kinds of reactors were used to investigate the decomposition of formaldehyde. The experimental results show that the reaction accords with first order kinetics. The formaldehyde decomposition caused by both the plasma and a nanometer sized TiO__2 catalyst is preferable to that by the plasma alone. The decomposition by positive discharges excels that of negative discharges with decomposition rate approximately proportional to the discharge voltage. The outlet ozone concentration is effectively reduced by the nanometer size TiO_2 catalyst.