首页|FeMnTiOx催化剂协同脱硝脱汞性能研究

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

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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.
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.

transition metal oxidesselective catalytic reductiondenitrificationoxidation of elemental mercuryreaction mechanism

王斌宇、王兵、胡江亮、常丽萍、王胜、王建成

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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

中国科学院大连化学物理研究所,辽宁 大连 116023

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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

国家自然科学基金山西省青年基金山西省高等学校科技创新项目山西省科技创新人才团队项目

U20A20132202103021246142021L071202204051002025

2024

现代化工
中国化工信息中心

现代化工

CSTPCD北大核心
影响因子:0.553
ISSN:0253-4320
年,卷(期):2024.44(4)
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