活性炭无纺布表面污染物的吸附特性研究

Adsorption of Air Pollutants on Non-Woven Fabric with Activated Carbon

实验研究了活性炭无纺布表面CO2和挥发性有机化合物(VOCs)的吸附特性.研究结果表明:在低气流速度条件下,活性炭无纺布能够很好地吸附空气中的CO2,系统的能耗也低;环境温度对活性炭无纺布表面CO2吸附效率的影响不大,但低空气湿度有利于CO2的吸附;在实验条件下,活性炭无纺布表面VOCs的吸附效率与迎风气流中VOCs的体积分数无关,与污染源的种类有关;低气流速度有利于VOCs的吸附;虽然增加吸附层的层数既有利于活性炭无纺布表面的CO2吸附,也有利于VOCs吸附,但实验中当吸附层增加到3层以上时,吸附效率随吸附厚度的增加而提高的效果不再明显,而吸附系统的阻力却迅速增大.

The adsorption behavior of CO2 and volatile organic compounds （VOCs） on a non-woven fabric loaded with activated carbon was investigated. The experimental results show that lower air velocity is helpful to the adsorption of CO2. The effect of temperature on CO2 adsorption is small, but lower relative humidity is beneficial to the adsorption of CO2. The adsorption efficiency of VOCs on the non-woven fabric is independent of the concentration of VOCs at windward side while it is dependent on the type of pollutant sources. And lower air velocity is helpful to the adsorption of VOCs. Increasing the number of adsorption layers can result in an increase in the absorption efficiency of the non-woven fabric for both CO2 and VOCs while it also increases the resistance of the cleaning system. The absorption efficiency does not increase anymore when the number of the layers is over 3 in the study. Then the suitable thickness of adsorption layer is of significance for high absorption efficiency and low energy cost.