焙烧温度对硫酸活化稀土尾矿成形催化剂脱硝性能的影响研究  

Study on the Effect of Roasting Temperature on Denitration Performance of Rare Earth Tailings Monolithic Catalyst Activated by Sulfuric Acid

作　　者：侯丽敏 卢林博 高红敏 陈翰 武文斐 HOU Li-min;LU Lin-bo;GAO Hong-min;CHEN Han;WU Wen-fei(Key Laboratory of Efficient and Clean Combustion in Inner Mongolia Autonomous Regin,School of Energy and Environment,Inner Mongolia University of Sncience&Technology,Baotou 014010,China;Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources,Inner Mongolia University of Sncience&Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学能源与环境学院内蒙古自治区高效洁净燃烧重点实验室,内蒙古包头014010 [2]内蒙古科技大学白云鄂博矿多金属资源综合利用重点实验室,内蒙古包头014010

出　　处：《稀有金属与硬质合金》2024年第4期40-47,53,共9页Rare Metals and Cemented Carbides

基　　金：国家重点研发计划项目(2020YFC1909102);国家自然科学基金项目(51866013);内蒙古自然科学基金项目(2020BS05030,2019ZD13);内蒙古自治区大学生创新训练项目(202310127024,202310127056)。

摘　　要：以硫酸活化稀土尾矿催化剂粉末为原料,通过添加助剂和整体挤压的方式制备成形催化剂,对其进行XRD、BET、XPS、H_(2)-TPR表征分析,并在脱硝活性实验平台上测试催化脱硝反应活性和N_(2)选择性,确定了合适的催化剂焙烧制度。结果表明,350℃焙烧的条状催化剂具有最优催化脱硝活性和最大比表面积,其Fe2p轨道的XPS谱峰向高结合能方向偏移,Fe-Ce协同作用明显。以此焙烧温度可以制备出脱硝效率为81%且N_(2)选择性高的蜂窝状催化剂,其机械强度满足成形催化剂的国家标准。Using the catalyst powder of rare earth tailings activated by sulfuric acid as raw material,a monolithic catalyst was prepared by adding additives and integral extrusion,and then characterized and analyzed by XRD,BET,XPS,and H_(2)-TPR.In addition,its catalytic denitration reaction activity and N_(2) selectivity were tested on a denitration activity test platform to determine the suitable roasting system of the catalyst.The results show that the strip-shaped catalyst roasted at 350℃presents the best catalytic denitration activity and the largest specific surface area.The XPS spectral peak of its Fe2p orbital shifts towards high binding energy,indicating a significant Fe-Ce synergistic effect.At this roasting temperature,a honeycomb-shaped catalyst with a denitration efficiency of 81%and high N_(2) selectivity can be prepared,and its mechanical strength meets the national standard for the monolithic catalysts.

关 键 词：成形催化剂 稀土尾矿 硫酸活化 焙烧温度 脱硝活性 N_(2)选择性 

分 类 号：TQ426[化学工程]