硝酸改性活性碳纤维降低NO性能研究

摘要

在微型反应器中对用硝酸处理后的各种活性碳纤维(ACF)进行了脱除NO的 实际效果对比，并用硝酸对聚丙烯腈基ACF进行不同时间的处理，确定出处理时间为2～4 h较佳。定量考察了不同温度下NO的还原程度及其产物分布，并通过程序升温脱附(TPD)、 热重(TG)及扫描电镜(SEM)的研究，考察了所选ACF在不同气氛下的变化规律，并进行了化学 动力学计算。实验结果表明，硝酸处理后的ACF具有较高的脱氮效果。%Five kinds of ［ACF］HNO３ made from the standard ACF after having treated by 60% concentration nitric acid at 20 ℃ for different time dipping ,were used in the reduction of NO.These samples study in a flow mircroreatctor.t he best［ACF］HNO３ was surface treated 2～4 hours ACF by nitric acid.By us e of thermogravimetry (TG),temperature programmed desorption (TPD) and scanning electron microscope (SEM) analysis technique,［ACF］HNO３ was evaluated and s elected successfully.Moreover,the influences of O２，CO２，and temperature on NO reduction were examined.The study was concentrated on te kinetics researc h of ACF in air.The test results show that NO concentration may be reduced effec tively,and ［ACF］HNO３ shows the more excellent performance than the standard ACF.