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Removal of thiophene sulfur model compound for coal by microwave with peroxyacetic acid

机译：过氧乙酸微波去除煤中噻吩硫模型化合物

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摘要

Thiophene sulfur removal from coal by microwave with peroxyacetic acid was explored in this paper. To simplify the reaction system, dibenzothiophene was selected as the model compound for the thiophene sulfur in coal. Changes of sulfur form distribution were determined by XANES analysis. Results showed that 67% thiophene sulfur in model samples was oxidized after treatment, while most of the oxidation products (sulfoxide or sulfone) remained in coal matrix. Quantum chemical calculation results showed that the strength of C-S bond could be decreased in the process of oxidation reaction under external electric field. In addition, the external electric field could promote the oxidation of thiophenes. These findings confirmed that the thiophene sulfur removal from coal was promoted by the synergistic effects of oxidation and microwave field, which was conducive to reveal the removal mechanism of thiophene sulfur groups from coal.
机译：本文研究了微波用过氧乙酸去除煤中的噻吩硫。为了简化反应体系，选择了二苯并噻吩作为煤中噻吩硫的模型化合物。通过XANES分析确定硫形式分布的变化。结果表明，模型样品中67％的噻吩硫经过处理后被氧化，而大多数氧化产物（亚砜或砜）保留在煤基质中。量子化学计算结果表明，在外电场下氧化反应过程中，C-S键的强度可能降低。另外，外部电场可以促进噻吩的氧化。这些发现证实了氧化和微波场的协同作用促进了煤中噻吩硫的去除，有利于揭示煤中噻吩硫基的去除机理。

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  • 来源
    《Fuel》 |2020年第jul15期|117748.1-117748.8|共8页
  • 作者

  • 作者单位

    China Univ Min & Technol Key Lab Coal Proc & Efficient Utilizat Minist Educ Xuzhou 221116 Jiangsu Peoples R China|China Univ Min & Technol Sch Chem Engn & Technol Xuzhou 221116 Jiangsu Peoples R China;

    Maiqiang Technol Co Ltd Shanghai 200335 Peoples R China;

    Weihai Haiwang Hydrocyclone Co Ltd Weihai 264200 Peoples R 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

    Coal; Desulfurization; Thiophene; Microwave; Sulfur-containing model compounds; High organic sulfur;

    机译：煤炭;脱硫噻吩;微波;含硫模型化合物;高有机硫;

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