摘要
以碳纳米纤维为载体,采用液相共沉淀法制备MnO_2/CNFs催化剂并将其应用于低温选择性催化还原(SCR)NO,利用BET,XRD,FESEM,EDS,TEM及XPS对催化剂的微观形貌、结构特征、元素组成以及价态分布进行表征。结果表明:催化剂的活性组分是MnO_2,且以无定型态负载于CNFs表面。在80~180℃下进行低温脱硝活性的测试。当负载量为6%时,MnO_2/CNFs催化剂的脱硝性能最为优异,在80℃时脱硝率就达到了65.25%,当温度升高至180℃时脱硝率达95.25%。无定型结构、良好的分散性以及较高的表面吸附氧含量是MnO_2/CNFs催化剂具有优异低温脱硝催化活性的主要原因。本研究在未经过任何酸处理的情况下使MnO_2负载在CNFs上,很大程度上减小了对环境的污染。
Based on CNFs supports,a series of MnO 2/CNFs catalysts were synthesized by a liquid phase coprecipitation method,and it was applied to selective catalytic reduction(SCR)of NO.The microstructure,elemental composition,and valence state of the as-obtained catalysts were characterized by BET,XRD,FESEM,EDS,XPS and TEM.The results show that MnO 2 is distributed on the surface of CNFs with amorphous form equably as the active components.MnO 2/CNFs catalyst shows up the best activity in the test of SCR at the testing temperature range of 80-180℃,when the loading amount is 6%.NO transformation rate is 65.25%at 80℃,and 95.25%at 180℃.Amorphous structure,favorable dispersion and higher content of surface oxide are the main cause of MnO 2/CNFs’s excellent catalytic activity at low temperature.MnO 2 is loaded on the CNFs without any acid-treated,which makes it more environment-friendly.
作者
邹海强
杨隽逸
郑玉婴
陈健
卢秀恋
ZOU Hai-qiang;YANG Jun-yi;ZHENG Yu-ying;CHEN Jian;LU Xiu-lian(College of Materials Science and Engineering,Fuzhou University, Fuzhou 350108,China;Fujian Haixia Environmental ProtectionCompany,Fuzhou 350108,China)
出处
《材料工程》
EI
CAS
CSCD
北大核心
2018年第9期53-58,共6页
Journal of Materials Engineering
基金
福州市科技计划资助项目(2015H0016)
关键词
液相共沉淀法
MnO2/CNFs催化剂
脱硝
低温选择性催化还原
碳纳米纤维
liquid-phase coprecipitation method
MnO 2/CNFs catalyst
denitrification
low-temperature selective catalytic reduction
carbon nanofiber
