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Emissions of polycyclic aromatic hydrocarbons (PAHs) during hydrothermally treated municipal solid waste combustion for energy generation

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  • Peng, Nana
  • Liu, Zhengang
  • Liu, Tingting
  • Gai, Chao

Abstract

Hydrothermal treatment (HT) is one of the efficient approaches for upgrading municipal solid waste (MSW). In the present study, emission characteristics of polycyclic aromatic hydrocarbons (PAHs) from hydrothermally treated municipal solid waste (H-MSW) combustion alone and H-MSW/coal co-combustion were investigated at different temperatures. The results showed that for all fuel combustion, the majority of PAHs were 3- or 4-ring PAHs. In addition, flue gas had the highest yields of PAHs followed by fly ash and bottom ash, while the ring number of dominated PAHs in fly ash was higher than those in flue gas and bottom ash. Compared to MSW, H-MSW combustion generated less PAHs at the value of 1131.95–7649.24μg/g. The blending of H-MSW and coal reduced total PAH emissions and positive interactions were observed between H-MSW and coal during co-combustion. The toxicity equivalent quantity (TEQ) values of the PAHs from combustion were in the order MSW>H-MSW>H-MSW/coal, which was consistent with the total PAH emissions. The present study illustrated that significant reduction of PAH emissions and toxicity from combustion could be achieved by HT and the blending of H-MSW and coal.

Suggested Citation

  • Peng, Nana & Liu, Zhengang & Liu, Tingting & Gai, Chao, 2016. "Emissions of polycyclic aromatic hydrocarbons (PAHs) during hydrothermally treated municipal solid waste combustion for energy generation," Applied Energy, Elsevier, vol. 184(C), pages 396-403.
    • Handle: RePEc:eee:appene:v:184:y:2016:i:c:p:396-403
    DOI: 10.1016/j.apenergy.2016.10.028
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    References listed on IDEAS

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    1. Park, Ki-Bum & Oh, Seung-Jin & Begum, Guzelciftci & Kim, Joo-Sik, 2018. "Production of clean oil with low levels of chlorine and olefins in a continuous two-stage pyrolysis of a mixture of waste low-density polyethylene and polyvinyl chloride," Energy, Elsevier, vol. 157(C), pages 402-411.
    2. Peng, Nana & Gai, Chao & Peng, Chao, 2020. "Enhancing hydrogen-rich syngas production and energy recovery efficiency by integrating hydrothermal carbonization pretreatment with steam gasification," Energy, Elsevier, vol. 210(C).
    3. Park, Ki-Bum & Jeong, Yong-Seong & Guzelciftci, Begum & Kim, Joo-Sik, 2019. "Characteristics of a new type continuous two-stage pyrolysis of waste polyethylene," Energy, Elsevier, vol. 166(C), pages 343-351.
    4. Munir, M.T. & Mohaddespour, Ahmad & Nasr, A.T. & Carter, Susan, 2021. "Municipal solid waste-to-energy processing for a circular economy in New Zealand," Renewable and Sustainable Energy Reviews, Elsevier, vol. 145(C).

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