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标题: Ag-Cu modified ZSM-5 zeolite to effectively eliminate NOx and slip ammonia from coal-fired flue gas: Catalytic performance and characterization

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

来源出版物: JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 卷: 10 期: 5 文献号: 108461 DOI: 10.1016/j.jece.2022.108461 出版年: OCT 2022

摘要: To eliminate NOx emission and slip ammonia from coal-fired plants, ZSM-5 zeolites were modified with copper and different amount of silver. According to the activity measurement results, Ag-1.5-Cu/ZSM-5 zeolite could exhibit 100 % NH3 conversion efficiency at 350 ? and the N2 selectivity was more than 90 %. Meanwhile, when NO was introduced in the gas flow, the NO and NH3 conversion efficiency of Ag1.5-Cu/ZSM-5 reached 97 % and 100 % at 300 ?. The catalyst also showed good tolerance to H2O and SO2. XRD, BET, SEM and TEM experiments confirmed that the addition of silver and copper oxides would not destroy the MFI skeleton structure orsignificantly destroy the microporous and mesoporous structure of the molecular sieve. Moreover, Ag-Cu/ZSM-5 catalyst exhibited stronger surface acidity and promoted the NH3 adsorption ability (NH3-TPD). In addition, there were more active oxygen on Ag-Cu/ZSM-5 catalyst resulting from the interaction between silver and copper oxides, which contributed to its better redox performance (XPS and H-2-TPR).

入藏号: WOS:000860399100005

语言: English

文献类型: Article

作者关键词: ZSM-5; Ag-Cu modification; NH3-SCR; Slip ammonia

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

[Zhang, Jingbo] CCCC Second Highway Consultants Co Ltd, Wuhan 430079, Hubei, Peoples R China.

[Liu, Shinian] China Southern Power Grid Technol Co Ltd, Guangzhou 510080, Peoples R China.

[Zhou, Yongyan] Elect Power Res Inst Guangdong Power Grid Co Ltd, Guangzhou 510080, 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：7.968