锰钴铈复合氧化物催化氧化NO性能研究  

Study on the catalytic oxidation of NO over manganese cobalt cerium composite oxides

作　　者：班云飞 朱燕群[1] 唐海荣[1,2] 孙雨霖 刘佩希 何勇 王智化[1] BAN Yunfei;ZHU Yanqun;TANG Hairong;SUN Yulin;LIU Peixi;HE Yong;WANG Zhihua(Qingshanhu Energy Reseach Center Zhejiang University,State Key Laboratory of Clean Energy Utilization,Hangzhou,310027,China;Nuclear Power Institute of China,Chengdu,610213,China)

机构地区：[1]浙江大学青山湖能源研究基地,能源高效清洁利用国家重点实验室,杭州310027 [2]中国核动力研究设计院,成都610213

出　　处：《环境化学》2024年第8期2631-2639,共9页Environmental Chemistry

基　　金：国家自然科学基金杰出青年基金(52125605);中央高校基本科研业务费专项资金(2022ZFJH004);中国高等教育学会2022年度高等教育科学研究规划课题重点项目(22WL0307)资助。

摘　　要：通过柠檬酸溶胶凝胶法成功制备了系列MnCoCeO_(x)催化剂,用于催化烟气中残留氧气氧化NO.XRD、BET、XPS、NH_(3)-TPD和H_(2)-TPR等表征结果表明Mn_(2.5)Co_(1.5)Ce1O_(x)催化剂比表面积、孔容更大,具有更多的表面高价态Mn^(3+)、Mn^(4+)、Co^(3+)物种,丰富的表面酸性位点以及更强的低温氧化还原能力,有利于NO的催化氧化.Mn_(2.5)Co_(1.5)Ce1O_(x)催化剂能在200—350℃的宽温度范围内保持60%以上的NO氧化效率,并且在260℃下达到最大值83.9%,为催化烟气中残留氧气氧化NO提供了新思路.A series of MnCoCeO_(x)catalysts were successfully prepared by a citric acid sol-gel method and used for catalyzing the oxidation of NO by residual oxygen in the flue gas.The characterization results of XRD,BET,XPS,NH_(3)^(-)TPD,and H_(2)-TPR implied that Mn2.5Co1.5Ce1O_(x)catalyst had a larger surface area and pore volume,more surface high-valence Mn^(3+),Mn^(4+),Co^(3+)species,abundant surface acidic sites and stronger low-temperature redox ability,which were conducive to the catalytic oxidation of NO.Mn_(2.5)Co_(1.5)Ce1O_(x)catalyst could maintain a NO oxidation efficiency of over 60%in a wide temperature range of 200—350℃,and reached a maximum of 83.9%at 260℃,providing a novel idea for catalytic oxidation of NO with residual oxygen in the flue gas.

关 键 词：MnCoCeO_(x) 复合氧化物 催化氧化 NO 酸性位. 

分 类 号：X-1[环境科学与工程] O6[理学—化学]