Abstract: ACFN (activated carbon fibers modified by nitric acid) supported cerium catalyst was prepared. The structure of such catalyst prepared was characterized by SEM，BET and XRD methods. The results indicated that cerium particles were highly dispersed on the surface of ACFN. The performance of CeO2/ACFN in low temperature selective catalytic reduction (SCR) of NO was studied. The activated carbon fibers (ACF) was pre-oxidized by nitric acid firstly，and then loaded with CeO2. The de-NO efficiency could be greatly enhanced. The highest de-NO efficiency could be obtained with a loading of 9％ CeO2. In the cases of high space velocity(11 000 h－1)，a high catalytic activity was observed at 180 ℃，and NO reduction conversion was 93.96％.

摘要： 制备了CeO2/ACFN（硝酸氧化处理的改性活性碳纤维）催化剂，对低温选择性催化还原（SCR）NO性能进行了考察。用SEM、BET和XRD进行催化剂结构特性表征，结果显示CeO2微粒高度分散在ACF的表面。实验表明，ACF先经过硝酸预氧化，然后再负载CeO2，能明显提高对NO的转化效率，CeO2负载量为9％（质量分数），180 ℃、空速为11 000 h－1时，CeO2/ACFN的NO脱除率为93.96％。