标题：Comparative study of Co/TiO2, Co-Mn/TiO2 and Co-Mn/Ti-Ce catalysts for oxidation of elemental mercury in flue gas作者：Li, HH (Li, Honghu); Wang, SK (Wang, Shengkai); Wang, X (Wang, Xu); Tang, N (Tang, Nian); Pan, SW (Pan, Siwei); Hu, JJ (Hu, Jiangjun)

来源出版物：CHEMICAL PAPERS卷：71期：9 页码:1569-1578 DOI：10.1007/s11696-017-0152-5 出版年：SEP 2017

摘要：The Co-Mn/Ti-Ce catalyst prepared by sol-gel and impregnation method was evaluated for catalytic oxidation of Hg-0 in the simulated flue gas compared with Co/TiO2 and Co-Mn/TiO2. The results showed that Co-Mn/Ti-Ce catalyst exhibited higher catalytic activity (around 93% Hg-0 removal efficiency in the temperature of 150 A degrees C with 6% O-2, 400 ppm NO, 200 ppm SO2 and 3% H2O) than Co/TiO2 and Co-Mn/TiO2. Based on the characterization results of N-2 adsorption-desorption, XRD, UV-Vis, XPS, H-2-TPR and Hg-TPD, it could be concluded that the lower band gap, better reducibility and mercury adsorption capability and the presence of Co3+/Co2+, Mn4+/Mn3+ and Ce4+/Ce3+ redox couples as well as surface oxygen species contributed to the excellent Hg-0 oxidation removal performance. In addition, well dispersion of active components and a synergetic effect among Co, Mn and Ce species might improve the activity further. A Mars-Maessen mechanism is thought to be involved in the Hg-0 oxidation. The lattice oxygen derived from MnO (x) or CoO (x) would react with adsorbed Hg-0 to form HgO and the consumption of lattice oxygen could be replenished by O-2. For Co-Mn/Ti-Ce, MnO (x-1) could be alternatively reoxidized by the lattice oxygen derived from adjacent CoO (x) and CeO (x) which is beneficial to the Hg-0 oxidation.

入藏号：WOS:000408347800003

文献类型：Article

语种：English

作者关键词： Co-Mn/Ti-Ce catalyst; Elemental mercury; Catalytic oxidation; Characterization

扩展关键词： MANGANESE OXIDE/TITANIA MATERIALS; NO OXIDATION; REMOVAL; TEMPERATURE; HG-0; V2O5-WO3/TIO2; ADSORPTION; REDUCTION; CEO2-TIO2; PHASE

通讯作者地址：Hu, JJ (reprint author), Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430079, Hubei, Peoples R China.

电子邮件地址： jjhu1963@outlook.com

地址：

[Li, Honghu; Wang, Shengkai; Wang, Xu; Hu, Jiangjun] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430079, Hubei, Peoples R China.

[Tang, Nian; Pan, Siwei] Guangdong Power Grid Co, Environm Protect Dept, Elect Power Res Inst, Guangzhou 510080, Guangdong, Peoples R China.

研究方向：Chemistry

ISSN： 0366-6352

eISSN:1336-9075

影响因子：1.258