光催化降解甲醛废气的研究

通过使用自制的光催化剂(二氧化钛、三氧化钨)分别负载在玻纤上,对甲醛气体进行光催化降解。以动态法考察了温度、湿度对光催化降解甲醛的影响。实验结果表明:随着温度、湿度的升高,光催化降解甲醛气体的降解率先升高后降低。最佳反应条件为:反应温度38℃,反应湿度40%,以WO3/TiO2/玻纤为光催化剂,甲醛降解率达到76%。并对WO3/TiO2/玻纤光催化降解甲醛的反应动力学进行了初步研究,结果表明:以WO3/TiO2/玻纤为光催化剂,光催化降解甲醛反应符合一级反应动力学规律。

Study on the photocatalytic degradation of formaldehyde

In this article,formaldehyde was photocatalysis degraded by self-prepared photocatalyst(TiO_(2),WO_(3))deposited on fiberglass.The effects of the temperature,humidity on degradation of formaldehyde were investigated by dynamic method.The results showed that photocatalytic degradation rate of formaldehyde rises at first and then down with temperature and humidity rising;the best reaction temperature is 38℃,reaction humidity is 40%,using WO_(3)/ TiO_(2) /fiberglass as photocatalyst,degradation rate of formaldehyde reach 76%.The study on the relation between photocatalytic degradation rate of formaldehyde with different influent concentrations and degradation time showed that the degradation fitted well with first order kinetics model.