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A Probable Origin of Dibenzothiophenes in Coals and Oils

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  • Yu Ji

    (Ningbo Key Laboratory of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
    School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China)

  • Qiang Yao

    (Ningbo Key Laboratory of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
    School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
    Key Laboratory of Bio-Based Polymeric Materials Technology and Application of Zhejiang Province, Ningbo 315201, China)

  • Weihong Cao

    (Ningbo Key Laboratory of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China)

  • Yueying Zhao

    (Ningbo Key Laboratory of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China)

Abstract

To probe the possibility of thiophenolate as an origin of dibenzothiophenes (DBTs) and establish the detailed chemical transformations from thiophenolate to DBTs, the thermal degradation of thiophenolate has been carried out at various temperatures. The characterizations of both gaseous products and solid residues indicate that DBTs together with benzene, diphenyl sulfide, and diphenyl disulfide are the major degradation products. The presence of benzene supports that the thermal degradation of thiophenolate begins with the homolysis of Ar‒H bonds. The subsequent hydroarylation followed by the elimination and cyclization reactions facilely generates DBTs. The transformation of thiophenolate to DBTs is chemically simple and highly geochemically feasible. It readily unifies the chemical pathways involved in the generation of DBTs from thiophenolate and that of dibenzofurans from phenolate in nature.

Suggested Citation

  • Yu Ji & Qiang Yao & Weihong Cao & Yueying Zhao, 2021. "A Probable Origin of Dibenzothiophenes in Coals and Oils," Energies, MDPI, vol. 14(1), pages 1-16, January.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:1:p:234-:d:474678
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    References listed on IDEAS

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    1. Nzihou, Ange & Stanmore, Brian & Lyczko, Nathalie & Minh, Doan Pham, 2019. "The catalytic effect of inherent and adsorbed metals on the fast/flash pyrolysis of biomass: A review," Energy, Elsevier, vol. 170(C), pages 326-337.
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