摘要
以煤系高岭土为硅源,十六烷基三甲基溴化铵(CTAB)为模板剂,水热合成得到介孔材料,并用傅里叶变换红外光谱(FTIR)、扫描电子显微镜(SEM)和N_2吸附脱附等测试手段对产物进行表征。结果表明,合成的介孔材料骨架上具有Si—O,Si—OH和Si—O—Si等介孔材料特征结构,材料BET比表面积为734.86m~2/g,孔径分布在3.6 nm处出现峰值;Mn/La-MCM-41在300℃脱硝温度下,掺杂比例为0.04、包覆比例为0.25时,脱硝效率最高达到88.9%。
In this paper, using coal-series kaolin as silicon source and hexadecyl trimethyl ammonium bromide(CTABr) as the template agent, researchers obtain mesoporous materials with hydrothermal synthesis and then use testing measures, like Fourier transform infrared spectroscopy(FTIR), scanning electron microscopy(SEM), and N2 adsorption and desorption, to characterize the products. The result shows that the synthesized mesoporous material skeleton has the characteristic structure of Si-O,Si-OH and Si-O-Si. The material has a BET specific surface area of 734.86 m2/g and a pore size distribution peaking at 3.6 nm; at the temperature of 300℃, denitration efficiency peaks at 88.9% when the doping ratio is 0.04 and the coating ratio is 0.25.
引文
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