| Ce-MnOx低温净化氮氧化物和一氧化碳的催化性能研究 |
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| 引用本文： | 韩新宇,刘凯杰,边梦瑶,张一波,杨向光.Ce-MnOx低温净化氮氧化物和一氧化碳的催化性能研究[J].无机盐工业,2021,53(12):35-42. |
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| 作者姓名： | 韩新宇 刘凯杰 边梦瑶 张一波 杨向光 |
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| 作者单位： | 1.中国科学技术大学,安徽合肥 2300262.中国科学院赣江创新研究院3.中国科学院长春应用化学研究所 |
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| 基金项目： | 国家自然科学基金项目(22072141);国家自然科学基金项目(22176185);国家自然科学基金项目(21872133);中国科学院青年创新促进会人才项目(2018263);江西省自然科学基金项目(20212BAB213032);中国科学院重点部署项目(ZDRWCN-2021-3-3-3);中国科学院赣江创新研究院自主部署项目(E055C003) |
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| 摘 要： | 为协助工业界实现碳达峰与碳中和的目标,聚焦于低温烟气中氮氧化物（NOx）和一氧化碳（CO）的协同脱除,以铈（Ce）和锰（Mn）的无机盐为前驱体,采用共沉淀法、机械球磨法、溶液燃烧法和溶胶-凝胶法制备了Ce元素改性的Mn基氨选择性催化还原（NH3-SCR）/一氧化碳（CO）氧化双效纳米催化剂。使用固定床-在线质谱/色谱测试系统对催化剂性能进行了评价,并利用X射线衍射、氮气-物理吸附等表征手段对Ce-MnOx纳米催化剂进行了表征分析。结果表明,反向共沉淀法制备的催化剂具有最优的NOx和CO协同脱除性能,在100 000 mL/（g·h）的高空速条件下,140 ℃以上能够实现CO净化率超过85%,100 ℃以上能够脱除气体中80%以上的NOx,且运行20 h后仅出现微弱的性能衰减。其活性组分为具有高比表面积（100 m2/g以上）的CeMnOx,因此能够吸附更多气体进行反应,表现出优异的催化性能。
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| 关 键 词： | 低温选择性催化还原 一氧化碳催化氧化 稀土元素 锰氧化物 |
| 收稿时间： | 2021-10-24 |
Catalytic performance study of Ce-MnOx for low-temperature purification of nitrogen oxides and carbon monoxide |
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| HAN Xinyu,LIU Kaijie,BIAN Mengyao,ZHANG Yibo,YANG Xiangguang.Catalytic performance study of Ce-MnOx for low-temperature purification of nitrogen oxides and carbon monoxide[J].Inorganic Chemicals Industry,2021,53(12):35-42. |
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| Authors: | HAN Xinyu LIU Kaijie BIAN Mengyao ZHANG Yibo YANG Xiangguang |
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| Affiliation: | 1. University of Science and Technology of China,Hefei 230026,China2. Ganjiang Innovation Academy,Chinese Academy of Sciences3. Changchun Institute of Applied Chemistry,Chinese Academy of Sciences |
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| Abstract: | In order to assist the industry in achieving the goal of emission peak and carbon neutrality,focusing on the syner-gistic removal of oxynitrides（NOx） and carbon monoxide（CO） in low-temperature flue gas,inorganic salts of cerium（Ce） and manganese（Mn） were used as precursors,then Mn-based ammonia selective catalytic reduction（NH3-SCR）/CO oxidation bi-functional nanocatalysts modified by Ce were prepared by co-precipitation,mechanical ball milling,solution combustion and sol-gel methods.The catalytic performance was evaluated on a fixed bed reactor with online mass spectrometry/chromato-graphy system.The structure of Ce-MnOx nanocatalysts were characterized and analyzed by X-ray diffraction,N2-physisorp-tion and other techniques.The results showed that the catalyst prepared by the reverse co-precipitation method had the best performance for synergistic removal of NOx and CO.At a high space velocity of 100 000 mL/（g·h）,more than 85% of CO purification can be achieved above 140 ℃,more than 80% of NOx in the gas can be removed above 100 ℃,and only a slight performance degradation occurs after 20 h of operation.The active component was CeMnOx with a high specific surface area above 100 m2/g,which could adsorb more gas for reaction and showed excellent catalytic performance. |
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| Keywords: | low-temperature selective catalytic reduction catalytic oxidation of carbon monoxide rare earth elements man-ganese oxide |
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