双金属有机骨架Cu_(1/6)-MOF-5的制备及其低温CO-SCR脱硝性能  

Preparation and low-temperature CO-SCR denitration properties of bimetallic organic framework Cu_(1/6)-MOF-5

作　　者：何汉兵 张超 王于思 张丽 曾婧 HE Han-bing;ZHANG Chao;WANG Yu-si;ZHANG Li;ZENG Jing(School of Metallurgy and Environment,Central South University,Changsha 410083,China;National Key Laboratory of Environmental Protection Mining and Metallurgy Resources Utilization and Pollution Control,Wuhan University of Science and Technology,Wuhan 430081,China;Key Laboratory of Metallurgical Emission Reduction&Resources Recycling,Ministry of Education,Anhui University of Technology,Ma’anshan 243002,China;Changsha Ruixi Environmental Protection Equipment Manufacturing Co.,Ltd.,Changsha 410201,China)

机构地区：[1]中南大学冶金与环境学院,长沙410083 [2]武汉科技大学国家环境保护矿冶资源利用与污染控制重点实验室,武汉430081 [3]安徽工业大学冶金减排与资源综合利用教育部重点实验室,马鞍山243002 [4]长沙瑞熙环保设备制造有限公司,长沙410201

出　　处：《中国有色金属学报》2022年第11期3365-3374,共10页The Chinese Journal of Nonferrous Metals

基　　金：湖南省自然科学基金资助项目(2020JJ4685);国家环境保护矿冶资源利用与污染控制重点实验室开放基金课题资助项目(HB201908);冶金减排与资源综合利用教育部重点实验室开放基金课题资助项目(JKF20-02)。

摘　　要：低温催化剂是CO选择性催化还原(CO-SCR)的关键。本文通过一步溶剂热法成功合成Cu_(1/6)-MOF-5催化剂,利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、傅里叶红外光谱(FTIR)、拉曼光谱(Raman)、X射线光电子能谱(XPS)对催化剂的结构进行表征。结果表明:掺杂的Cu元素具有Cu^(+)、Cu^(2+)两种价态,且部分取代了MOF-5中的Zn位形成双金属有机骨架Cu_(1/6)-MOF-5。同时,Cu的掺杂增加了氧空位的浓度,从而使得催化剂拥有更高的催化活性,Cu_(1/6)-MOF-5的脱硝率在160℃时达到89%,在200℃时达到95%,分别比相应温度下MOF-5的脱硝率高57%和25%;即使在含硫环境中,其在200℃时的脱硝率仍大于87%。Low-temperature catalyst is the key to CO-selective catalytic reduction(CO-SCR).Cu_(1/6)-MOF-5catalyst was successfully synthesized by one-step solvothermal method.X-ray diffractometer(XRD),scanning electron microscope(SEM),Fourier transform infrared spectroscopy(FTIR),Raman spectroscopy(Raman)and X-ray photoelectron spectroscopy(XPS)were used to characterize the structure of the catalysts.The results show that the doped Cu exists in+1 and+2 valence states and partially replaces the Zn site in MOF-5 to form the bimetallic organic framework Cu_(1/6)-MOF-5.At the same time,the Cu doping increases the concentration of oxygen vacancies,so that the catalyst has higher catalytic activity.Specifically,the denitrification rate of Cu_(1/6)-mof-5 catalyst increases from 32%to 89%at 160℃and from 70%to 95%at 200℃.Even in the sulfurcontaining environment,the NO conversion rate can still reach 87%at 200℃.

关 键 词：MOF-5 CU掺杂 CO-SCR 脱硝机理 

分 类 号：TB34[一般工业技术—材料科学与工程]