关键词: 氮氧化物, 锰氧化物, 二氧化铈, 活性碳纤维, 选择性催化还原

Abstract: Manganese catalysy supported on activated carbon fibers modified by nitric acid (MnOx/ACFN) was prepared by the method of impregnation. The activity of MnOx/ACFN catalyst was tested for selective catalytic reduction (SCR) of NO with ammonia at low-temperature. The effects of manganese content and the methods and content of cerium loading for improving the denitration activity of MnOx/ACFN catalyst were investigated. The physical and chemical characteristics of these catalysts were studied with X-ray diffraction (XRD) and scanning electron microscope (SEM). The most active catalyst with the highest conversion of NOx of 92.2% was prepared under the conditions of adding CeO2 by co-precipitation，total loading of MnOx and CeO2 15%，molar ratio of cerium to manganese 3∶2，reaction temperature 200 ℃.

Key words: nitrogen oxides, MnOx, CeO2, activated carbon fibers, selective catalytic reduction