FeMnTiOx催化剂协同脱硝脱汞性能研究
Research on synergistic denitrification and mercury removal performance of FeMnTiOx catalyst
王斌宇 1王兵 1胡江亮 1常丽萍 1王胜 2王建成1
作者信息
- 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;太原理工大学化学工程与技术学院,山西太原 030024;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
- 2. 中国科学院大连化学物理研究所,辽宁 大连 116023
- 折叠
摘要
通过共沉淀法制备了FeMnTiOx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、N2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,Fe0.5MnTiOx-400催化剂在150～330℃范围内的NO转化率大于90％;在200℃下的Hg0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.
Abstract
FeMnTiOx 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 FeMnTiOx catalyst and the catalytic reaction mechanism are analyzed by using X-ray diffraction,electron microscopy,N2 adsorption/desorption,hydrogen temperature-programmed reduction,ammonia temperature-programmed desorption and X-ray photoelectron spectroscopy.It is indicated that the conversion of NO by Fe0.5MnTiOx-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 Hg0 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Key words
transition metal oxides/selective catalytic reduction/denitrification/oxidation of elemental mercury/reaction mechanism引用本文复制引用
基金项目
国家自然科学基金(U20A20132)
山西省青年基金(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)
出版年
2024
NETL
NSTL
万方数据