标题: Improved activity and SO2 tolerance of rare-earth elements modified CeTi catalyst for Hg-0 and NO simultaneous removal from flue gas

作者: Long, YF (Long, Yifei); He, Z (He, Zhong); Liu, SN (Liu, Shinian); Zhou, YY (Zhou, Yongyan); Liu, WJ (Liu, Wenjie); Yin, YJ (Yin, Yajie); Tong, X (Tong, Xin); Li, XY (Li, Xiaoyi); Hu, K (Hu, Kang); Hu, JJ (Hu, Jiangjun)

来源出版物: ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS 卷: 44 期: 2 页: 3575-3583 DOI: 10.1080/15567036.2022.2067271 出版年: JUN 15 2022

摘要: Six rare-earth elements (including La, Sm, Pr, Dy, Y, and Nd) were modified on the surface of the CeTi samples for Hg-0 oxidation and NO oxidation. The X-CeTi catalysts significantly improved the Hg-0 oxidation, NO oxidation, and SO2 tolerance compared with the CeTi catalyst. Moreover, O-2 and NO can facilitate the activities significantly. The BET results showed that the specific surface area could be increased by doping of rare-earth elements. In addition, XRD and FT-IR experiments indicated that the rare-earth elements can facilitate the formation of the amorphous structure of CeO2. The XPS curves of Ce 3d and O 1s showed that surface oxygen species and Ce4+/Ce3+ redox couples were responsible for the catalytic performance, confirming that the SO2 tolerance was improved via the electron transfer by Ce4++Dy2+Ce3++Dy3+ reactions. The H-2-TPR results suggested that the redox capacity of X-CeTi catalysts was enhanced, which could improve the activities of the catalysts. Moreover, Dy-CeTi had the highest NO and Hg-0 oxidation among these rare-earth elements on account of the largest specific surface, more surface-active oxygen and H-2-TPR reduction peak integral area. The catalyst can maintain the conversion efficiency of elemental mercury and NO at 67% and 76% even in flue gas containing 800 ppm SO2. Such work supplied new insights into modified Ce-Ti catalysts to simultaneously remove NO and elemental mercury from the flue gas with high efficiencies, which owned a promising prospect in the practical industrial application.

入藏号: WOS:000788346100001

语言: English

文献类型: Article

作者关键词: Rare-earth elements doping; Hg-0 oxidation; NO conversion; CeO2; TiO2; SO2 tolerance

地址: [Long, Yifei; Liu, Wenjie; Yin, Yajie; Tong, Xin; Li, Xiaoyi; Hu, Kang; Hu, Jiangjun] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430079, Hubei, Peoples R China.

[Liu, Shinian] China Southern Power Grid Technol Co Ltd, Guangzhou, Peoples R China.

[Zhou, Yongyan] Guangdong Power Grid Co Ltd, Techn Management Elect Power Res Inst, Guangzhou, Peoples R China.

[He, Zhong] CCCC Second Highway Consultants Co Ltd, Green & Low Carbon Technol Ctr, Wuhan, 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：3.447