FeMnTiO_(x)催化剂协同脱硝脱汞性能研究  

Research on synergistic denitrification and mercury removal performance of FeMnTiO_(x) catalyst

作　　者：王斌宇 王兵[1,2,3] 胡江亮 常丽萍[1,2,3] 王胜[4] 王建成 WANG Bin-yu;WANG Bing;HU Jiang-liang;CHANG Li-ping;WANG Sheng;WANG Jian-cheng(State Key Laboratory of Clean and Efficient Coal Utilization,Taiyuan University of Technology,Taiyuan 030024,China;College of Chemical Engineering and Technology,Taiyuan University of Technology,Taiyuan 030024,China;Key Laboratory of Coal Science and Technology of the Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China;Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China)

机构地区：[1]太原理工大学省部共建煤基能源清洁高效利用国家重点实验室,山西太原030024 [2]太原理工大学化学工程与技术学院,山西太原030024 [3]太原理工大学煤科学与技术教育部重点实验室,山西太原030024 [4]中国科学院大连化学物理研究所,辽宁大连116023

出　　处：《现代化工》2024年第4期90-96,共7页Modern Chemical Industry

基　　金：国家自然科学基金项目(U20A20132);山西省青年基金项目(20210302124614);山西省高等学校科技创新项目(2021L071);山西省科技创新人才团队项目(202204051002025)。

摘　　要：通过共沉淀法制备了FeMnTiO_(x)催化剂,通过调变焙烧温度和Fe/Mn摩尔比调控催化剂的表面酸性和氧化还原能力,从而优化协同脱硝脱汞性能。利用X射线衍射、电子显微镜、N_(2)吸附/解吸、氢气程序升温还原、氨气程序升温脱附和X射线光电子能谱等手段分析催化剂的结构和催化反应机理。结果表明,焙烧温度为400℃、Fe/Mn摩尔比为0.5时,Fe_(0.5)MnTiO_(x)-400催化剂在150~330℃范围内的NO转化率大于90%;在200℃下的Hg^(0)转化率高于90%,脱硝效率达到100%,表现出良好的协同脱硝脱汞性能。FeMnTiO_(x) catalyst is prepared via co⁃precipitation method,and the surface acidity and redox capacity of the catalyst is regulated through varying the calcination temperature and the Fe/Mn molar ratio,therefore its performance in synergistic denitrification and mercury removal is optimized.The structure of FeMnTiO_(x) catalyst and the catalytic reaction mechanism are analyzed by using X⁃ray diffraction,electron microscopy,N_(2) adsorption/desorption,hydrogen temperature⁃programmed reduction,ammonia temperature⁃programmed desorption and X⁃ray photoelectron spectroscopy.It is indicated that the conversion of NO by Fe_(0.5)MnTiO_(x)⁃400 catalyst exceeds 90%in the temperature range of 150-330℃when the catalyst is prepared at a calcination temperature of 400℃and a Fe/Mn molar ratio of 0.5.By using this catalyst,the conversion of Hg^(0) at 200℃is higher than 90%,and the denitrification efficiency reaches 100%,showing good synergistic denitrification and mercury removal performance.

关 键 词：过渡金属氧化物 选择性催化还原 氮氧化物脱除 元素汞氧化 反应机制 

分 类 号：TH3[机械工程—机械制造及自动化]