标题: Simultaneous removal of elemental mercury and NO from flue gas by the CeO2/TiO2 catalysts and the mechanism investigation

作者: He, Z (He, Zhong); Long, YF (Long, Yifei); Liu, WJ (Liu, Wenjie); Li, XY (Li, Xiaoyi); Wang, Y (Wang, Yuan); Hu, JJ (Hu, Jiangjun)

来源出版物: CANADIAN JOURNAL OF CHEMICAL ENGINEERING DOI: 10.1002/cjce.24135提前访问日期: JUN 2021

摘要: Mercury pollution has become one of the high-profile environmental problems in the world. A series of CeyTi catalyst were synthesized by sol-gel method, and the process of simultaneous conversion of NO and removal of mercury (Hg-0) in the flue gas was studied. BET, SEM, and XRD were used to systematically detect the physicochemical properties of the catalysts, which show that excessive Ce loading would make its specific surface area reduce. The NO conversion efficiency would increase with the increase of the Ce loading. The optimal Ce/Ti mass ratio was 0.3. A part of the adsorbed NO would be oxidized by the active oxygen species on the catalyst surface to produce a certain amount of nitrogen-containing substances, such as NO+, NO3-, or NO2. The produced substances could promote the adsorption and oxidation of Hg-0. The NO conversion was very dependent on the oxygen in the flue gas. The activity of the Ce0.3Ti catalyst was promoted in the presence of O-2. SO2 and H2O would inhibit the reaction of NO conversion and Hg-0 removal. The mechanisms of the catalytic system have been proved via the Mars-Maessen mechanism.

入藏号: WOS:000657840600001

语言: English

文献类型: Article; Early Access

作者关键词: catalytic oxidation; CeO2; TiO2; elemental mercury; mechanism; NO

地址: [He, Zhong; Long, Yifei; Liu, Wenjie; Li, Xiaoyi; Wang, Yuan; Hu, Jiangjun] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430079, Hubei, Peoples R China.

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

影响因子：1.687