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  • CN 31-1691/TQ

SnOx-CeOx/沥青基球形活性炭催化剂选择性催化还原NO的脱硝性能

王艳莉 崔均烜 褚晨婕 詹亮

王艳莉, 崔均烜, 褚晨婕, 詹亮. SnOx-CeOx/沥青基球形活性炭催化剂选择性催化还原NO的脱硝性能[J]. 华东理工大学学报(自然科学版). doi: 10.14135/j.cnki.1006-3080.20211014002
引用本文: 王艳莉, 崔均烜, 褚晨婕, 詹亮. SnOx-CeOx/沥青基球形活性炭催化剂选择性催化还原NO的脱硝性能[J]. 华东理工大学学报(自然科学版). doi: 10.14135/j.cnki.1006-3080.20211014002
WANG Yanli, CUI Junxuan, CHU Chenjie, ZHAN Liang. Denitration performance of SnOx-CeOx/Pitch-Based Spherical Activated Carbon Catalysts for Selective Catalytic Reduction of NO[J]. Journal of East China University of Science and Technology. doi: 10.14135/j.cnki.1006-3080.20211014002
Citation: WANG Yanli, CUI Junxuan, CHU Chenjie, ZHAN Liang. Denitration performance of SnOx-CeOx/Pitch-Based Spherical Activated Carbon Catalysts for Selective Catalytic Reduction of NO[J]. Journal of East China University of Science and Technology. doi: 10.14135/j.cnki.1006-3080.20211014002

SnOx-CeOx/沥青基球形活性炭催化剂选择性催化还原NO的脱硝性能

doi: 10.14135/j.cnki.1006-3080.20211014002
基金项目: 国家自然科学基金(51472086, 51002051, 22075081, 20806024);上海市自然科学基金(12ZR1407200)
详细信息
    作者简介:

    王艳莉(1975—),女,陕西省西乡县人,副教授,博士,主要研究方向为碳质功能材料的结构控制及其在能源、环境领域中的应用基础研究。E-mail: ylwang@ecust.edu.cn

  • 中图分类号: TQ032

Denitration performance of SnOx-CeOx/Pitch-Based Spherical Activated Carbon Catalysts for Selective Catalytic Reduction of NO

  • 摘要: 以高软化点石油沥青为原料制备的球形活性炭为载体,采用浸渍法负载锡铈氧化物制得SnOx-CeOx/沥青基球形活性炭系列催化剂,考察了其在低温下的脱硝性能,并利用N2吸/脱附,X射线衍射(XRD),X射线光电子能谱(XPS)等方法对催化剂进行了表征。结果表明,向CeOx/PSAC催化剂中添加SnOx后其脱硝活性显著增加;催化剂的脱硝活性随金属担载量的增加呈现先升高后降低的趋势。Sn(w=5%)Ce(w=13%)/PSAC(本文以Sn(5%)Ce(13%)/PSAC表示)催化剂具有最高的脱硝活性,在100~300 oC温度范围内得到最高NO转化率98%。添加SnOx后提高了CeO2在载体表面的分散性,而且Sn4+替代Ce4+掺杂于立方相CeO2晶格中形成固溶体,从而提高了催化剂的脱硝活性。此外,与单组份铈催化剂相比,Sn(5%)Ce(13%)/PSAC催化剂具有较好的抗SO2毒化性能。

     

  • 图  1  沥青基球形活性炭(PSAC)的SEM照片

    Figure  1.  SEM image of PSAC

    图  2  沥青球形活性炭的N2吸/脱附等温线(a)和孔径分布图(b)

    Figure  2.  (a) N2 adsorption/desorption isotherms and (b) corresponding pore size distribution curves of PSAC

    图  3  不同催化剂的脱硝活性比较

    Figure  3.  Comparison of NO removal activity over various catalysts

    图  4  不同金属担载量时SnOx-CeOx/PSAC催化剂的脱硝活性

    Figure  4.  NO removal activities over SnOx-CeOx/PSAC catalysts with different metal loadings

    图  5  260 oC下SO2对Sn(5%)Ce(13%)/PSAC和Ce/PSAC催化剂脱硝活性的影响

    Figure  5.  Effect of SO2 on NO removal activities over Sn(5%)Ce(13%)/PSAC and Ce/PSAC catalysts at 260 oC

    图  6  不同金属担载量时SnOx-CeOx/PSAC催化剂的N2吸/脱附曲线(a)和孔径分布图(b)

    Figure  6.  (a) Nitrogen adsorption/desorption isotherms and (b) corresponding pore size distribution curves of SnOx-CeOx/PSAC catalysts with different metal loadings

    图  7  不同样品的XRD谱图

    Figure  7.  XRD patterns of the different samples

    图  8  Sn(5%)Ce(13%)/PSAC催化剂的XPS全谱图

    Figure  8.  XPS full spectrum of Sn(5%)Ce(13%)/PSAC

    图  9  Sn(5%)Ce(13%)/PSAC催化剂的C 1s(a),O 1s(b),Ce 3d(c)和Sn 3d(d)的XPS分峰谱图

    Figure  9.  XPS spectra of C 1s (a), O 1s(b), Ce 3d (c) and Sn 3d (d) for Sn(5%)Ce(13%)/PSAC

    表  1  沥青球形活性炭的孔结构参数

    Table  1.   Pore structure parameters of PSAC

    SampleSBET/(m2·g-1)Smic/(m2·g-1)Vtotal/(cm3·g-1)Vmic/(cm3·g-1)
    PSAC152213730.660.60
    Note: SBET: BET specific surface area; Smic: Micropore surface area; Vtotal: Total pore volume; Vmic: Micropore volume
    下载: 导出CSV

    表  2  不同催化剂的BET比表面积和孔结构

    Table  2.   BET specific surface area and pore structure of various catalysts

    SampleSBET/(m2·g-1)Smic/(m2·g-1)Vtotal/(cm3·g-1)Vmic/(cm3·g-1)
    Sn(1%)Ce(3%)/PSAC9268610.360.35
    Sn(3%)Ce(8%)/PSAC7546680.350.28
    Sn(5%)Ce(13%)/PSAC6846240.310.26
    Sn(7%)Ce(18%)/PSAC5134520.240.19
    下载: 导出CSV

    表  3  Sn(5%)Ce(13%)/PSAC催化剂表面元素浓度

    Table  3.   Surface atomic concentrations of Sn(5%)Ce(13%)/PSAC catalyst

    Surface atomic concentration
    (%)
    Relative atomic fraction/ %
    SnCCeOOβOα
    1.0882.921.9614.0478.721.3
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-10-14
  • 录用日期:  2022-01-11
  • 网络出版日期:  2022-04-14

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