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Preparation and applications of hierarchical porous carbons from direct coal liquefaction residue

机译：煤直接液化残渣制备分级多孔碳及其应用

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摘要

Hierarchical porous carbons (HPCs) were prepared from direct coal liquefaction residue (CLR) by KOH activation with addition of silica or silicate. Based on the template role of the mineral salts formed during the KOH activation process, the obtained HPCs have both mesopores and micropores. Several series of samples with different preparation conditions, such as different silica sources, additive dosages, washing procedures after carbonization and additional KOH for the additive in the activation process, were prepared and characterized. The results show that the microporosity of the carbons can increase by more than 28% owing to the addition of silica or silicate, along with the ratio of mesoporosity to microporosity being close to 1:1. Compared with the CLR-based carbon from traditional KOH activation, HPCs with appropriate preparation conditions have improved catalytic performance for catalytic methane decomposition and higher capacitances for supercapacitors.
机译：通过直接煤液化残渣（CLR）通过KOH活化并添加二氧化硅或硅酸盐来制备分层多孔碳（HPC）。基于在KOH活化过程中形成的无机盐的模板作用，获得的HPC具有中孔和微孔。制备并表征了具有不同制备条件的一系列样品，例如不同的二氧化硅来源，添加剂用量，碳化后的洗涤程序以及活化过程中添加剂的额外KOH。结果表明，由于添加了二氧化硅或硅酸盐，碳的微孔率可以增加28％以上，并且介孔率与微孔率之比接近1：1。与来自传统KOH活化的CLR基碳相比，具有合适制备条件的HPC具有改进的催化甲烷分解催化性能和较高的超级电容器电容量。

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  • 来源
    《Fuel》 |2013年第7期|2-8|共7页
  • 作者

    Jianbo Zhang; Lijun Jin; Jie Cheng; Haoquan Hu;

  • 作者单位

    State Key Laboratory of Fine Chemicals, Institute of Coal Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China;

    State Key Laboratory of Fine Chemicals, Institute of Coal Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China;

    State Key Laboratory of Fine Chemicals, Institute of Coal Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China;

    State Key Laboratory of Fine Chemicals, Institute of Coal Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Hierarchical porous carbonl; Coal liquefaction residue; Methane decomposition; Capacitance;

    机译：分层多孔碳;煤液化残渣;甲烷分解;电容;

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