Catalytic oxidation of gas-phase mercury over Co/TiO2 catalysts prepared by sol-gel method
Catalytic oxidation of gas-phase mercury over Co/TiO2 catalysts prepared by sol-gel method
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DOI：
10.1016/j.catcom.2011.04.017
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发表时间：
2011-08-15
影响因子：
3.7
通讯作者：
Wu, Zhongbiao
中科院分区：
文献类型：
--
作者：
Liu, Yue;Wang, Yuejun;Wu, Zhongbiao
采用溶胶-凝胶法制备了Co/TiO 2催化剂，并对该催化剂进行了汞的气相氧化研究。实验结果表明，Co的最佳负载量为7.5%，在120-330 ℃范围内，氧化效率可达90%以上。高活性主要是由于富集了分散良好的Co 3 O 4。研究还发现，氧气在汞的氧化过程中起着关键作用，而HCl则会腐蚀氧化态汞并将其释放到气相中。此后，提出了一个修改的Mars-Maessen机制，并研究了可能的同时氧化NO和汞。(C)2011 Elsevier B. V.保留所有权利。
Co/TiO2 catalysts prepared by sol-gel method were studied for gas-phase mercury oxidation in this paper. Experimental results revealed that the optimal loading of Co was 7.5%, which yielded more than 90% oxidation efficiency within the temperature range of 120-330 degrees C. The high activity was mainly attributed to the enrichment of well dispersed Co3O4. We also found that oxygen performed a key role in mercury oxidation process, while HCl could corrode the oxidized mercury and release it to gas phase. Thereafter, a modified Mars-Maessen mechanism was proposed and the possible simultaneous oxidization of NO and mercury was studied. (C) 2011 Elsevier B.V. All rights reserved.