SO_2和NO对ACF低温脱除模拟燃煤烟气中VOC的影响

Effect of SO_2 and NO on removal of VOC from simulated flue gas by activated carbon fibers at low temperature

采用H2O2浸渍的方法对活性炭纤维(ACF)进行改性,并利用氮吸附等温线和XPS(X-ray photoelectron spectroscopy)的方法对ACF样品进行表征。通过实验测定改性前后ACF脱除VOC(甲苯作为VOC的代表物)的效果,同时考察二氧化硫(SO2)和一氧化氮(NO)对ACF脱除甲苯的影响。研究发现,双氧水浸渍改性对ACF的BET表面积和孔容没有影响,但使得ACF样品表面的含氧官能团含量大量增加。实验数据也表明,SO2和NO对VOC在ACF上的吸附具有抑制作用,且随着两者浓度的增加,抑制作用也增强。研究还发现,SO2和NO同时存在比单一的SO2或NO对VOC在ACF上吸附的抑制作用更为明显。

Volatile organic compounds（VOC） seriously affect the environment and human health.The removal of pollutants from coal-fired power plants based on ACF adsorption is a promising method.In this paper,hydrogen peroxide（H2O2） was used to modify the ACF sample,and the methods of N2 adsorption isotherm and XPS（X-ray photoelectron spectroscopy） were utilized to characterize the ACF samples.The adsorption tests of VOC（toluene as a typical representative） based on ACF were conducted and the effect of SO2 and NO on the adsorption of toluene were investigated.It was found that H2O2 modification had no impact on the BET surface and pore volume of the ACF sample,but increased the oxygen groups on the ACF surface.The results also indicated that SO2 or NO inhibited the adsorption of VOC on ACF,and this inhibition became strong with increasing concentration of SO2 or NO.It is also found that the coexistence of SO2 and NO deteriorated the adsorption VOC on ACF more seriously than the single existence of SO2 or NO.