| 改性镍铝催化剂氧化零价汞及抗氨干扰机理 |
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| 引用本文： | 邱磊,郭磊,韩金池,余杰,常化振.改性镍铝催化剂氧化零价汞及抗氨干扰机理[J].中国环境科学,2022,42(1):11-19. |
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| 作者姓名： | 邱磊 郭磊 韩金池 余杰 常化振 |
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| 作者单位： | 1. 中国人民大学环境学院, 北京 100872;2. 益阳市人民代表大会环境与资源保护委员会, 湖南 益阳 413000 |
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| 基金项目： | 国家自然科学基金资助项目(51938014,51778619)； |
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| 摘 要： | 采用尿素水解法制备NiAlO和NiAlMO(M=Zn、Ba、Mn、La、Cr)催化剂用于Hg0催化氧化研究.结果表明,在NH3存在时,NiAlZnO催化剂展现出最好的Hg0氧化活性,250℃时Hg0的转化率超过80％,并在350℃达到最高(90％).Raman和XPS结果显示,Zn掺杂构成Ni-O-Zn固溶体,引起Ni...
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| 关 键 词： | NiAlZnO催化剂 Hg0氧化 Hg0吸附 抗NH3干扰 |
| 收稿时间： | 2021-06-03 |
Hg0 oxidation of modified Ni-Al catalysts and its anti-ammonia interference mechanism |
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| QIU Lei,GUO Lei,HAN Jin-chi,YU Jie,CHANG Hua-zhen.Hg0 oxidation of modified Ni-Al catalysts and its anti-ammonia interference mechanism[J].China Environmental Science,2022,42(1):11-19. |
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| Authors: | QIU Lei GUO Lei HAN Jin-chi YU Jie CHANG Hua-zhen |
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| Institution: | 1. School of Environment and Natural Resources, Renmin University of China, Beijing 100872, China;2. Environment and Resources Protection Committee of Yiyang People's Congress, Yiyang 413000, China |
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| Abstract: | NiAlO and NiAlMO (M=Zn、Ba、Mn、La、Cr) catalysts were prepared to evaluate the efficiency of Hg0 oxidation of NiAlZnO catalyst using urea hydrolyzation, Raman and XPS experiments, etc. The results indicate that NiAlZnO catalyst exhibited the highest Hg0 oxidation activity in the presence of NH3 and the Hg0 oxidation efficiency of NiAlZnO catalyst was above 80% at 250℃ and reached 90% at 350℃. Doping Zn enabled the NiAlZnO catalyst to form Ni-O-Zn solid solution and generate Jahn-Teller distortions which could increase the content of surface chemisorbed oxygen and promote the activation of O2, and thus increase the surface chemisorption oxygen content of catalyst. The incorporation of Zn could improve the redox and Hg0 adsorption performance of NiAlZnO catalyst, even in the presence of NH3. NH3-TPD and NH3-DRIFT experiments also proved that the addition of Zn introduced the new Hg0 adsorption site (B acid site) for NiAlZnO catalyst. Obviously, NiAlZnO catalyst can greatly promote Hg0 oxidation and possesses the resistance to NH3 interference. |
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| Keywords: | NiAlZnO catalyst Hg0 oxidation Hg0 adsorption anti-NH3 interference |
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