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改性活性炭吸附烧结烟气中氮氧化物的研究

蔡建宇 彭兆丰 宋丽云 侯环宇 李坚

蔡建宇, 彭兆丰, 宋丽云, 侯环宇, 李坚. 改性活性炭吸附烧结烟气中氮氧化物的研究[J]. 钢铁钒钛, 2021, 42(1): 75-82. doi: 10.7513/j.issn.1004-7638.2021.01.013
引用本文: 蔡建宇, 彭兆丰, 宋丽云, 侯环宇, 李坚. 改性活性炭吸附烧结烟气中氮氧化物的研究[J]. 钢铁钒钛, 2021, 42(1): 75-82. doi: 10.7513/j.issn.1004-7638.2021.01.013
Cai Jianyu, Peng Zhaofeng, Song Liyun, Hou Huanyu, Li Jian. Study on adsorption of nitrogen oxide in sintering flue gas by modified activated carbon[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(1): 75-82. doi: 10.7513/j.issn.1004-7638.2021.01.013
Citation: Cai Jianyu, Peng Zhaofeng, Song Liyun, Hou Huanyu, Li Jian. Study on adsorption of nitrogen oxide in sintering flue gas by modified activated carbon[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(1): 75-82. doi: 10.7513/j.issn.1004-7638.2021.01.013

改性活性炭吸附烧结烟气中氮氧化物的研究

doi: 10.7513/j.issn.1004-7638.2021.01.013
基金项目: 国家重点研发计划(2017YFC0210302);北京工业大学研究生科技基金(ykj-2017-00101)。
详细信息
    作者简介:

    蔡建宇(1992—),男,河北承德人,博士生,主要从事大气污染控制工程研究工作,E-mail:caijy@emails.bjut.edu.cn

    通讯作者:

    李坚(1965—),男,北京人,博士生导师,教授,博士,长期从事大气污染控制工程研究工作,E-mail: ljian@bjut.edu.cn

  • 中图分类号: TF046, X701

Study on adsorption of nitrogen oxide in sintering flue gas by modified activated carbon

  • 摘要: 以煤质活性炭为原料,制备了碳酸钾(K2CO3)改性活性炭,模拟烧结烟气条件,考察了其在有SO2、CO2和O2条件下的NOx吸附效果。试验表明:0.65 mol/L K2CO3改性活性炭的NOx吸附量最高,120 ℃时NOx吸附量可达15.17 mg/g,较原样提高了20倍以上;随着吸附温度的升高,NOx饱和吸附量有所下降,稳定在13.70~13.97 mg/g;由于SO2吸附后生成稳定硫酸盐难以脱除,影响了活性炭的加热再生效果。该吸附剂适用于移动床吸附处理烧结烟气。
  • 图  1  活性炭NOx吸附性能评价装置示意

    Figure  1.  Schematic diagram of NOx adsorption performance evaluation device of activated carbon

    图  2  不同浓度K2CO3改性活性炭NOx穿透曲线

    Figure  2.  Breakthrough curve of NOx of activated carbon modified by different concentrations of K2CO3

    图  3  不同浓度K2CO3改性活性炭NOx吸附速率

    Figure  3.  NOx adsorption rate of activated carbon modified by different concentrations of K2CO3

    图  4  不同温度条件下改性活性炭NOx穿透曲线

    Figure  4.  Breakthrough curve of NOx of activated carbon working at different temperatures

    图  5  不同温度条件下活性炭NOx吸附速率

    Figure  5.  NOx adsorption rate of activated carbon working at different temperatures

    图  6  改性活性炭循环吸附试验NOx穿透曲线

    Figure  6.  Breakthrough curve of NOx of activated carbon of cycle adsorption experiment

    图  7  改性活性炭循环吸附试验NOx吸附速率

    Figure  7.  NOx adsorption rate of activated carbon of cycle adsorption experiment

    图  8  改性活性炭中毒前后XPS谱图

    Figure  8.  XPS spectrum before and after modified activated carbon poisoning

    表  1  活性炭比表面积测定结果

    Table  1.   Measured specific surface area of activated carbon

    样品BET比表面积/(m2·g−1
    HH-0.60 906
    HH-0.65 892
    HH-0.70 897
    HH-0.75 904
    HH 1108
    下载: 导出CSV

    表  2  活性炭NOx吸附量

    Table  2.   Capacity of NOx adsorption by activated carbon

    样品NO吸附量/
    (mg·g−1)
    NO2吸附量/
    (mg·g−1)
    NOx吸附量/
    (mg·g−1)
    HH-0.60 5.02 4.12 9.14
    HH-0.65 8.40 6.77 15.17
    HH-0.70 6.90 6.25 13.15
    HH-0.75 7.50 6.52 14.022
    HH 0.36 0.26 0.62
    下载: 导出CSV

    表  3  不同温度下活性炭NOx吸附量

    Table  3.   Capacity of NOx adsorption by activated carbon working at different temperatures

    样品温度/℃NO吸附量/
    (mg·g−1)
    NO2吸附量/
    (mg·g−1)
    NOx吸附量/
    (mg·g−1)
    HH-0.65 50 8.41 10.00 18.41
    HH-0.65 75 6.63 7.33 13.96
    HH-0.65 100 7.50 6.47 13.97
    HH-0.65 120 7.63 6.07 13.70
    下载: 导出CSV

    表  4  改性活性炭再生后NOx吸附量

    Table  4.   Capacity of NOx adsorption by regenerative modified activated carbon

    再生次数NO吸附量/
    (mg·g−1)
    NO2吸附量/
    (mg·g−1)
    NOx吸附量/
    (mg·g−1)
    0 12.90 11.01 23.91
    1 11.62 12.01 23.63
    2 8.81 9.68 18.49
    3 7.17 8.48 15.65
    下载: 导出CSV
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