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活性炭表面含氧官能团对二噁英吸附的影响机制研究

常康恺 曾泽泉 杨亚涛 丁肖肖 黄张根 侯亚芹

常康恺, 曾泽泉, 杨亚涛, 丁肖肖, 黄张根, 侯亚芹. 活性炭表面含氧官能团对二噁英吸附的影响机制研究[J]. 燃料化学学报(中英文), 2021, 49(6): 873-880. doi: 10.19906/j.cnki.JFCT.2021029
引用本文: 常康恺, 曾泽泉, 杨亚涛, 丁肖肖, 黄张根, 侯亚芹. 活性炭表面含氧官能团对二噁英吸附的影响机制研究[J]. 燃料化学学报(中英文), 2021, 49(6): 873-880. doi: 10.19906/j.cnki.JFCT.2021029
CHANG Kang-kai, ZENG Ze-quan, YANG Ya-tao, DING Xiao-xiao, HUANG Zhang-gen, HOU Ya-qin. Study on the mechanism of adsorption of dioxins by oxygen-containing functional groups on activated carbon surface[J]. Journal of Fuel Chemistry and Technology, 2021, 49(6): 873-880. doi: 10.19906/j.cnki.JFCT.2021029
Citation: CHANG Kang-kai, ZENG Ze-quan, YANG Ya-tao, DING Xiao-xiao, HUANG Zhang-gen, HOU Ya-qin. Study on the mechanism of adsorption of dioxins by oxygen-containing functional groups on activated carbon surface[J]. Journal of Fuel Chemistry and Technology, 2021, 49(6): 873-880. doi: 10.19906/j.cnki.JFCT.2021029

活性炭表面含氧官能团对二噁英吸附的影响机制研究

doi: 10.19906/j.cnki.JFCT.2021029
基金项目: 国家自然科学基金(21978314)资助
详细信息
    通讯作者:

    E-mail: zghuang@sxicc.ac.cn

  • 中图分类号: TQ09

Study on the mechanism of adsorption of dioxins by oxygen-containing functional groups on activated carbon surface

Funds: The project was supported by the National Natural Science Foundation of China (21978314)
  • 摘要: 以分子结构和性质与二噁英相似的二苯并呋喃为模型化合物,椰壳炭为吸附剂,在120 ℃条件下进行了吸附实验。将硝酸改性后的样品分别在300、500、800 ℃进行热处理,比较了原始样品和改性后的椰壳炭对二苯并呋喃的吸附能力。并利用BET、TPD-MS、元素分析等手段对改性前后椰壳炭的物理化学性质进行了表征。结果表明,硝酸改性后椰壳炭表面含氧官能团增多,抑制了其对二苯并呋喃的吸附,其中,内酯基对二苯并呋喃吸附的影响最大,通过热处理,减少含氧官能团的含量,可提高椰壳炭对二苯并呋喃的吸附容量。
  • FIG. 722.  FIG. 722.

    FIG. 722.  FIG. 722.

    图  1  吸附剂吸附性能评价装置图

    Figure  1  Experimental apparatus for adsorption

    图  2  (a)不同样品的氮气吸附-脱附曲线 (b)不同样品的孔径分布

    Figure  2  (a) N2 adsorption-desorption isotherms, and (b) the pore size distribution of different samples

    图  3  改性前后活性炭的吸附容量

    Figure  3  Adsorption capacity of activated carbon before and after modification

    图  4  CO2峰曲线拟合

    Figure  4  Peak of CO2 curve fitting results

    图  5  CO峰曲线拟合

    Figure  5  Peak of CO curve fitting results

    图  6  改性样品的静态接触角测量

    Figure  6  Contact angle analysis of modified samples

    表  1  不同样品的孔结构参数

    Table  1  Textural properties of different samples

    SampleSSA/
    (m2·g−1
    Pore volume/
    (cm3·g−1
    Micropore volume/
    (cm3·g−1
    Average pore diameter
    AC-9501033.90.5590.3432.162
    AC-O-12 h1021.20.5470.3422.141
    AC-O-3001025.30.5510.3522.143
    AC-O-5001028.60.5590.3382.174
    AC-O-8001057.80.5900.3642.137
    下载: 导出CSV

    表  2  改性前后样品的元素组成

    Table  2  Elemental composition of the sample before and after modification

    SampleContent w/%
    CONH
    AC-95096.401.720.421.46
    AC-O-12 h85.8711.021.002.11
    AC-O-30087.529.780.901.80
    AC-O-50090.207.500.781.52
    AC-O-80094.613.440.871.08
    note: oxygen element is obtained by difference subtraction
    下载: 导出CSV

    表  3  不同样品表面含氧官能团的含量

    Table  3  The content of oxygen-containing functional groups on the surface of different samples

    SampleAdsorption capacity/(mg·g−1Functional group types
    carboxyllactoneanhydridephenolic hydroxylquinone and carbonyl
    AC-950235.30.000.000.000.000.11
    AC-O-12 h129.20.710.570.221.530.67
    AC-O-300148.70.000.560.231.580.70
    AC-O-500185.90.000.000.221.560.68
    AC-O-800229.40.000.000.000.000.08
    note: contents of various functional groups (mmol)
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-12-22
  • 修回日期:  2021-01-04
  • 网络出版日期:  2021-03-30
  • 刊出日期:  2021-06-30

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