钴铁双金属有机骨架及其炭化产物的低温脱硝性能研究

Low-temperature catalytic performance of cobalt-iron bimetallic organic framework and its carbonized products for NO-CO

采用水热法成功合成了钴铁双金属有机骨架Co_x/MIL-100(Fe)_(1/4CTAB)(x=1/5,1/10,1/20),其Co1/10/MIL-100(Fe)(1/4CTAB)形貌规整,在150℃脱硝率为45%左右,但180℃即可达到脱硝率90%左右,通过考察不同炭化气氛下将其作为前驱体炭化获得一系列炭基钴铁氧化物Fe-CoxOy/C(x=1/5,1/10,1/20)样品,对所制备的催化剂进行了表征,其Co1/10/MIL-100(Fe)(1/4CTAB)在800℃、微还原气氛(CO)下,炭化2h得到的Fe-Co1/10Oy/C(CO)在150和180℃脱硝率即可分别达到85%和95%左右,具有更加优越的低温脱硝性能。

In this paper,Cox/MIL-100(Fe)(1/4CTAB)(x=1/5,1/10,1/20)was obtained by solvothermal method and the Co1/10/MIL-100(Fe)(1/4CTAB)had a more regular appearance whose denitration rate was about 45%at 150℃ and 90%at 180℃.Cox/MIL-100(Fe)(1/4CTAB)(x=1/5,1/10,1/20)was used as precursors to carbonize in different atmosphere and then a series of Fe-CoxOy/C(x=1/5,1/10,1/20)samples were obtained.The physicochemical characterization of the prepared catalyst was carried out.The results showed that Fe-Co1/10Oy/C(CO)has the better low temperature denitrification performance,which was carbonized for two hours at 800℃ and an atmosphere of reduction using Co 1/10/MIL-100(Fe)(1/4CTAB)as the precursor,with denitrification rate of 85%and 95%at 150 and 180℃,respectively.