甲醛去除实验研究

发布时间：2018-08-02 20:38

【摘要】：治理室内环境污染，有必要研究高效、便捷的甲醛去除方法，提高甲醛降解率，本文采用正交试验分析二氧化氯降解甲醛，以二氧化氯浓度、甲醛浓度、反应时间和反应温度作为考察因素，分析其对甲醛降解的影响，获得甲醛降解的最佳条件，通过单因素实验分析二氧化氯浓度对甲醛降解率的影响。采用同一实验装置，以二氧化钛负载量、反应温度及湿度为因素，在紫外光条件下进行单因素实验，分析反应时间与甲醛浓度关系。结果表明： (1)在二氧化氯去除甲醛的研究中，通过正交试验得到最佳条件:二氧化氯浓度15mg/m3，甲醛浓度2mg/m3，反应温度25℃，，反应时间40min。在最佳条件下，以二氧化氯浓度为变量进行单因素实验，得出二氧化氯浓度为12.5mg/m3时降解率60%，甲醛降解效果最优。研究了甲醛浓度0.5mg/m3、反应40min、反应温度25℃、二氧化氯浓度5.0mg/m3时对甲醛降解效果，剩余甲醛浓度0.077mg/m3，降解率84.6%。 (2)在二氧化钛光催化去除甲醛研究中，通过单因素实验得到最佳条件是：室温25℃左右,湿度50%,紫外灯照射120min的条件下,负载5g自制二氧化钛的光催化对甲醛降解率能够达到91.6%,且在降解速率及降解效果上明显优于P25纳米二氧化钛对甲醛的降解效果。同时还研究了甲醛浓度0.5mg/m3与负载5g自制二氧化钛的光催化的反应，在210min时，剩余甲醛浓度0.062mg/m3，降解率为87.6%。
[Abstract]:In order to control indoor environmental pollution, it is necessary to study efficient and convenient methods to remove formaldehyde and improve the degradation rate of formaldehyde. In this paper, the orthogonal test is used to analyze the degradation of formaldehyde by chlorine dioxide, the concentration of chlorine dioxide and the concentration of formaldehyde. The influence of reaction time and reaction temperature on formaldehyde degradation was analyzed and the optimum conditions were obtained. The influence of chlorine dioxide concentration on formaldehyde degradation rate was analyzed by single factor experiment. A single factor experiment was carried out under ultraviolet light with titanium dioxide loading amount, reaction temperature and humidity as factors. The relationship between reaction time and formaldehyde concentration was analyzed. The results showed that: (1) in the study of formaldehyde removal by chlorine dioxide, the optimum conditions were obtained by orthogonal test: chlorine dioxide concentration 15 mg / m 3, formaldehyde concentration 2 mg / m 3, reaction temperature 25 鈩

本文编号：2160662