首页> 外文期刊>Journal of material cycles and waste management >Study on desulfurization performance of MnO_2-based activated carbon from waste coconut shell for diesel emissions control
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Study on desulfurization performance of MnO_2-based activated carbon from waste coconut shell for diesel emissions control

机译:废椰子壳中MnO_2基活性炭对柴油机排放的脱硫性能研究

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摘要

Increasing concern about the air pollution caused by sulfur dioxide (SO2) from diesel exhaust has resulted in the improvement of low-temperature desulfurization materials for the combined SO2 trap. In this study, coconut shell activated carbon (AC) is pretreated by nitric acid to prepare MnO2-based activated carbon materials for SO2 removal. The prepared materials are characterized intensively by SEM, TEM, BET, XRD, FTIR, and XPS. The SO2 capture capacity of these materials are measured at low temperature by thermogravimetry, and the SO2 equilibrium adsorption characteristic is also investigated. The results show that the concentrations of nitric acid do not significantly change the textural properties of MnO2-based AC materials. The content of surface-oxygenated groups (carbonyl carbon and transition) initially increases with the HNO3 concentration rising and reaches the maximum value when the HNO3 concentration is 10 mol/L, resulting in the enhancement of the SO2 capture capacity. SO2 capture capacity of MnO2-based activated carbon decreases after regeneration and keeps stable after several cycles of thermal regeneration. The experimental data for SO2 adsorption on MnO2-based AC composite can fit the Freundlich model well in comparison with Langmuir model.
机译:人们越来越关注由柴油机废气中的二氧化硫(SO2)引起的空气污染,从而改善了组合式SO2捕集阱的低温脱硫材料。在这项研究中,椰子壳活性炭(AC)用硝酸进行预处理,以制备用于去除SO2的MnO2基活性炭材料。通过SEM,TEM,BET,XRD,FTIR和XPS对制备的材料进行了深入的表征。通过热重法在低温下测量了这些材料的SO2捕集能力,并研究了SO2平衡吸附特性。结果表明,硝酸浓度不会显着改变MnO2基AC材料的组织性能。表面氧化基团(羰基碳和过渡碳)的含量最初随着HNO3浓度的增加而增加,并在HNO3浓度为10 mol / L时达到最大值,从而提高了SO2的捕集能力。 MnO2基活性炭的SO2捕集能力在再生后降低,并在几次热再生后保持稳定。与Langmuir模型相比,在MnO2基AC复合材料上SO2吸附的实验数据可以很好地拟合Freundlich模型。

著录项

  • 来源
    《Journal of material cycles and waste management》 |2018年第3期|1499-1506|共8页
  • 作者单位

    Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy, 2 Nengyuan Rd Wushan, Guangzhou 510640, Guangdong, Peoples R China;

    Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy, 2 Nengyuan Rd Wushan, Guangzhou 510640, Guangdong, Peoples R China;

    Kanazawa Univ, Kanazawa, Ishikawa 9201192, Japan;

    Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy, 2 Nengyuan Rd Wushan, Guangzhou 510640, Guangdong, Peoples R China;

    Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy, 2 Nengyuan Rd Wushan, Guangzhou 510640, Guangdong, Peoples R China;

    Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy, 2 Nengyuan Rd Wushan, Guangzhou 510640, Guangdong, Peoples R China;

    Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy, 2 Nengyuan Rd Wushan, Guangzhou 510640, Guangdong, Peoples R China;

    Nagoya Univ, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648603, Japan;

    Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy, 2 Nengyuan Rd Wushan, Guangzhou 510640, Guangdong, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    SO2; MnO2; Activated carbon; Nitric acid; Freundlich model;

    机译:SO2;MnO2;活性炭;硝酸;Freundlich模型;

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