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Citation: WANG Jun-wei, XU Can, QIN Wei, ZHANG Jian-li, ZHANG Xian-long, DONG Yan-jie, CUI Xiao-feng. Hg0 removal by palygorskite (PG) supported MnOx catalyst[J]. Journal of Fuel Chemistry and Technology, ;2020, 48(12): 1442-1451. shu

Hg0 removal by palygorskite (PG) supported MnOx catalyst

  • 1.

    College of Chemistry and Chemical Engineering, Anhui Key Laboratory of Functional Coordination Compounds, Anqing Normal University, Anqing 246011, China

  • 2.

    State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, China

  • 3.

    School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China

  • Corresponding author: QIN Wei, laviniaqin@163.com ZHANG Jian-li, zhangjl@nxu.edu.cn
  • Received Date: 10 September 2020
    Revised Date: 27 September 2020

    Fund Project: The project was supported by the National Natural Science Foundation of China (21203003, 51404014), the Anhui Provincial Natural Science Foundation (1708085MB49), Key Project of Anhui Provincial Outstanding Young Scholars in Colleges and Universities (gxyqZD2017062) and Foundation of State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering (2020-KF-28)the Anhui Provincial Natural Science Foundation 1708085MB49Key Project of Anhui Provincial Outstanding Young Scholars in Colleges and Universities gxyqZD2017062Foundation of State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering 2020-KF-28the National Natural Science Foundation of China 21203003the National Natural Science Foundation of China 51404014

Figures(13)

  • The MnOx/PG catalysts were prepared by supporting Mn oxides to palygorskite (PG) and used to remove Hg0 in simulated flue gas, which were analyzd and characterized by the specific surface area analysis (BET), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The results show that the co-effect of MnOx and PG significantly enhances the Hg0 removal performance; the MnOx/PG catalyst with 8% MnOx loading has the highest Hg0 removal activity. The Hg0 removal efficiency can maintain above 95% at 210 ℃ with a space velocity of 6000 h-1 and an inlet Hg0 concentration of 80 μg/m3 for 400 min. O2 can promote the Hg0 removal by MnOx/PG catalysts, while SO2 and H2O have inhibitory effects. In the presence of O2, the inhibitory effect of SO2 can be obviously weakened. The results of XRD, XPS and temperature programmed desorption experiments (TPD) indicate that the active components MnOx disperse well on the surface of PG. The removal process of Hg0 on the MnOx/PG catalyst includes the steps of adsorption, oxidation and reaction, and HgO and HgSO4 are generated and adsorbed on the catalyst.
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