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Fast co-pyrolysis characteristics of high-alkali coal and polyethylene using infrared rapid heating

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  • Li, Moshan
  • Lu, Yiyu
  • Hu, Erfeng
  • Yang, Yang
  • Tian, Yishui
  • Dai, Chongyang
  • Li, Chenhao

Abstract

Optimizing secondary reactions using infrared-fast pyrolysis has proved beneficial for investigating the co-pyrolysis behavior. In this study, co-pyrolysis of high-alkali coal (PC) and polyethylene at different temperatures, co-pyrolysis of polyethylene with demineralized coal (DP), and pyrolysis of raw high-alkali coal (RC) and demineralized coal (DC) were conducted in an infrared heating reactor. The results show that the co-pyrolysis promoted the formation of tar and the highest tar yield was 16.16% at 700 °C, and the PC tar yield was higher than that of RC, DC at 500 °C with 7.51% and 5.99% respectively. The tar yields of DP and PC were 7.49% and 11.80%, respectively, and the later had a slightly higher tar yield due to the interaction with AAEM. The addition of PE coupled infrared rapid heating can efficiently reduce the nitrogen and chlorine-containing fractions while increasing the content of long-chain alkanols and linear hydrocarbons. The content of organochlorines decreased from 2.95% at 500 °C to 1.00% at 800 °C. Alkanol and linear hydrocarbons have the highest content in the co-pyrolysis tar, with the total highest content of 61.56% at 600 °C.

Suggested Citation

  • Li, Moshan & Lu, Yiyu & Hu, Erfeng & Yang, Yang & Tian, Yishui & Dai, Chongyang & Li, Chenhao, 2023. "Fast co-pyrolysis characteristics of high-alkali coal and polyethylene using infrared rapid heating," Energy, Elsevier, vol. 266(C).
    • Handle: RePEc:eee:energy:v:266:y:2023:i:c:s0360544223000294
    DOI: 10.1016/j.energy.2023.126635
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