铜基复合氧化物催化CO氧化性能的研究  

Study on the Catalytic Performance of Copper-Based Composite Oxides for CO Oxidation

作　　者：张雨璇 尹贻朕 贾智元 姜明明 龚志军[1,3] ZHANG Yu-xuan;YIN Yi-zhen;JIA Zhi-yuan;JIANG Ming-ming;GONG Zhi-jun(School of Energy and Environment,Inner Mongolia University of Science and Technology,Baotou 014010,China;Collaborative lnnovation Center of Efficient and Comprehensive Utilization of Bayan Obo Associated Mineral Resources,Baotou 014010,China;Inner Mongolia Key Laboratory of Efficient and Clean Combustion,Baotou 014010,China)

机构地区：[1]内蒙古科技大学能源与环境学院,内蒙古包头014010 [2]白云鄂博共伴生矿资源高效综合利用省部共建协同创新中心,内蒙古包头014010 [3]内蒙古自治区高效洁净燃烧重点实验室,内蒙古包头014010

出　　处：《稀有金属与硬质合金》2025年第2期69-76,共8页Rare Metals and Cemented Carbides

基　　金：内蒙古自然科学基金项目(2019ZD13,2020MS05045);内蒙古高校基本科研业务费科研项目(2060206)。

摘　　要：采用浸渍法以γ-Al_(2)O_(3)小球为载体,以Cu-Ce、Cu-Mn、Cu-Zr或Cu-Co为活性组分制备铜基复合氧化物催化剂,研究不同组分、掺杂比、反应温度等因素对铜基复合氧化物催化CO氧化性能的影响,并使用BET、CO-TPR、SEM和XRD分析催化剂的表面性能、还原能力、表面形貌以及物相组成等。结果表明,在最佳的掺杂比条件下,不同活性组分的铜基复合氧化物的催化活性高低顺序为:铜铈复合氧化物>铜锰复合氧化物>铜锆复合氧化物>铜钴复合氧化物,其中铜铈复合氧化物的性能最优,且最优的掺杂比为n(Cu)∶n(Ce)=1∶0.1。该催化剂在150~200℃时CO转化率达到80%以上,200℃以上时CO转化率保持在90%以上。表征结果显示,铜铈复合氧化物催化活性优异是由于活性组分分散均匀,且具有较大的比表面积、良好的孔隙结构以及较强的氧化还原能力。Copper-based composite oxide catalysts were prepared by impregnation method usingγ-Al_(2)O_(3) spheres as carrier and Cu-Ce,Cu-Mn,Cu-Zr or Cu-Co as active components.The influence of different components,doping ratio and reaction temperature on the catalytic performance of copper-based composite oxides for CO oxidation was studied.The surface properties,reducibility,surface morphology and phase composition of the catalysts were analyzed by BET,CO-TPR,SEM and XRD.The results show that under the optimal doping ratio,the order of catalytic activity of copper-based composite oxides with different active components is as follows:Cu-Ce composite oxide>Cu-Mn composite oxide>Cu-Zr composite oxide>Cu-Co composite oxide.Among them,the Cu-Ce composite oxide exhibits the best performance,and the optimal doping ratio is n(Cu)∶n(Ce)=1∶0.1.This catalyst achieves a CO conversion rate of over 80%at 150~200℃and maintains a CO conversion rate of over 90%above 200℃.Characterization results indicate that the excellent catalytic activity of the Cu-Ce composite oxide is attributed to the uniform dispersion of active components,large specific surface area,good pore structure and strong redox ability.

关 键 词：铜基复合氧化物 CO催化氧化 浸渍法 γ-Al_(2)O_(3) 

分 类 号：TQ426.6[化学工程]