1.标题：Catalytic oxidation of Hg-0 in flue gas over Ce modified TiO2 supported Co-Mn catalysts: Characterization, the effect of gas composition and co-benefit of NO conversion

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：FUEL 卷：202 页码：470-482 DOI：10.1016/j.fuel.2017.04.071 出版年：AUG 15 2017

摘要：A series of Ce modified TiO2 supported Co-Mn catalysts (CoxMn5/TiCey) prepared by sol-gel method and impregnation method were evaluated for simultaneous catalytic oxidation of Hg-0 and NO in the simulated flue gas. Results showed that the catalysts exhibited good capacity of simultaneous catalytic oxidation of Hg-0 (around 70%) and NO (around 40%) at 300 degrees C using a simulated flue gas (Hg-0, NO, SO2, O-2, H2O and balanced N-2). These catalysts were investigated in detail by means of N-2 adsorption-desorption, XRD, Raman spectroscopy, TEM and XPS. The characterization results indicated that physical characteristics of catalysts were not the main contributor for Hg-0 and NO oxidation. Ce species existed mainly in amorphous phase. The addition of CeOx might lead to a migration of Co and Mn species from bulk to surface. The addition of Co could promote the generation of Mn2O3 but obstruct the dispersion of MnOx on the surface of catalyst. An appropriate increasing loading amount of CoOx or CeOx would be preferable for the improvement of activity performance. The presence of Co3+/Co2+, Mn4+/Mn3+ and Ce4+/Ce3+ redox couples as well as surface oxygen species contributed to the Hg-0 and NO oxidation. A possible synergetic effect Among Co, Mn and Ce species might improve the activity further. Furthermore, an increased oxygen concentration could facilitate the Hg-0 and NO oxidation. NO was observed to promote Hg-0 oxidation with the presence of O-2. SO2 led to a certain decrease of Hg-0 oxidation efficiency due to the competitive adsorption.H2O had a slightly inhibitory impact on Hg-0 oxidation. Moreover, NO oxidation was more susceptible to SO2 than Hg-0 oxidation over the catalyst.

入藏号：WOS:000404078500048

文献类型：Article

语种：English

作者关键词： Ce modified TiO2 supported Co-Mn catalysts; Elemental mercury; NO; Catalytic oxidation

扩展关键词： MANGANESE OXIDE/TITANIA MATERIALS; ELEMENTAL MERCURY OXIDATION; FIRED POWER-PLANTS; REMOVAL; TEMPERATURE; REDUCTION; ENHANCEMENT; ADSORPTION; CEO2-TIO2; BENZENE

2.标题：Catalytic oxidation of Hg-0 in flue gas over Ce modified TiO2 supported Co-Mn catalysts: Characterization, the effect of gas composition and co-benefit of NO conversion

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：FUEL 卷：202 页码：470-482 DOI：10.1016/j.fuel.2017.04.071 出版年：AUG 15 2017

摘要：A series of Ce modified TiO2 supported Co-Mn catalysts (CoxMn5/TiCey) prepared by sol-gel method and impregnation method were evaluated for simultaneous catalytic oxidation of Hg-0 and NO in the simulated flue gas. Results showed that the catalysts exhibited good capacity of simultaneous catalytic oxidation of Hg-0 (around 70%) and NO (around 40%) at 300 degrees C using a simulated flue gas (Hg-0, NO, SO2, O-2, H2O and balanced N-2). These catalysts were investigated in detail by means of N-2 adsorption-desorption, XRD, Raman spectroscopy, TEM and XPS. The characterization results indicated that physical characteristics of catalysts were not the main contributor for Hg-0 and NO oxidation. Ce species existed mainly in amorphous phase. The addition of CeOx might lead to a migration of Co and Mn species from bulk to surface. The addition of Co could promote the generation of Mn2O3 but obstruct the dispersion of MnOx on the surface of catalyst. An appropriate increasing loading amount of CoOx or CeOx would be preferable for the improvement of activity performance. The presence of Co3+/Co2+, Mn4+/Mn3+ and Ce4+/Ce3+ redox couples as well as surface oxygen species contributed to the Hg-0 and NO oxidation. A possible synergetic effect Among Co, Mn and Ce species might improve the activity further. Furthermore, an increased oxygen concentration could facilitate the Hg-0 and NO oxidation. NO was observed to promote Hg-0 oxidation with the presence of O-2. SO2 led to a certain decrease of Hg-0 oxidation efficiency due to the competitive adsorption.H2O had a slightly inhibitory impact on Hg-0 oxidation. Moreover, NO oxidation was more susceptible to SO2 than Hg-0 oxidation over the catalyst.

入藏号：WOS:000404078500048

文献类型：Article

语种：English

作者关键词： Ce modified TiO2 supported Co-Mn catalysts; Elemental mercury; NO; Catalytic oxidation

扩展关键词： MANGANESE OXIDE/TITANIA MATERIALS; ELEMENTAL MERCURY OXIDATION; FIRED POWER-PLANTS; REMOVAL; TEMPERATURE; REDUCTION; ENHANCEMENT; ADSORPTION; CEO2-TIO2; BENZENE

通讯作者地址：Hu, JJ (通讯作者),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, Elect Power Res Inst, Environm Protect Dept, Guangzhou 510080, Guangdong, Peoples R China.

研究方向：Energy & Fuels; Engineering

ISSN：0016-2361

eISSN: 1873-7153

影响因子：4.601