Reducing NO by NH3-SCR over Ferrite Catalysts

• Main Authors: GONG,ZHE-XIAN, 龔哲賢
• Other Authors: CHANG,CHIEN-KUEI
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/xg9jgp

碩士 === 國立高雄應用科技大學 === 化學工程與材料工程系博碩士班 === 104 === The selective catalytic reduction (SCR) is important technique to treat nitrogen oxides (NOx) of combustion exhaust. This study investigated the conversion efficiency of NO over seven kinds of ferrite catalysts (Fe3O4, Cu-ferrite, Mn-ferrite, Ni-ferrite, Cr-ferrite, Co-ferrite and Zn-ferrite) with NH3 as reductant. Results show that both Cu-ferrite and Mn-ferrite have great catalytic ability, especially under the ratio of the active center metal over iron (M/Fe) is 1/2.5. The NO conversion can reach nearly 100% at oxygen concentration of 6%, space velocity of 6000 hr-1, NO concentration of 3000ppm, NH3/NO ratio in 1.5 ~ 2.5, and reaction temperature between 75 to 400℃.