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Clean pyrolysis oil from a continuous two-stage pyrolysis of scrap tires using in-situ and ex-situ desulfurization

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  • Choi, Gyung-Goo
  • Oh, Seung-Jin
  • Kim, Joo-Sik

Abstract

Scrap tire pyrolysis was conducted to produce low sulfur oil (below 0.45 wt%), which is strongly demanded for reduction of SOx emissions. In the experiments, a continuous two-stage pyrolyzer consisting of an auger reactor and fluidized bed reactor and various additives (CaO, Fe, FeO, calcined olivine) and fluidizing media (product gas and N2) were tested for the in-situ desulfurization. The auger reactor operated at ∼340 °C yielded a liquid with 3–5 wt.% of pyrolysis oil. The content of DL-limonene in this liquid product was ∼51 wt% and increased further to ∼76 wt% through subsequent ethanol extraction. The fluidized bed reactor (∼510 °C) produced pyrolysis oils with yields around 30–37 wt%. N2 reduced the sulfur content in pyrolysis oil more effective than product gas, due to its dilution effect. The majority of tested desulfurizing additives reduced the sulfur content in pyrolysis oil, and the application of FeO powder and N2 in particular produced pyrolysis oil with the lowest sulfur content (0.39 wt%). Two ex-situ desulfurization methods (ethanol extraction and oxidation/ethanol extraction) were tested to further reduce the sulfur content. The oxidation/ethanol extraction method decreased the content of sulfur in pyrolysis oil to 0.17 wt%.

Suggested Citation

  • Choi, Gyung-Goo & Oh, Seung-Jin & Kim, Joo-Sik, 2017. "Clean pyrolysis oil from a continuous two-stage pyrolysis of scrap tires using in-situ and ex-situ desulfurization," Energy, Elsevier, vol. 141(C), pages 2234-2241.
    • Handle: RePEc:eee:energy:v:141:y:2017:i:c:p:2234-2241
    DOI: 10.1016/j.energy.2017.12.015
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    References listed on IDEAS

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    1. Kumaravel, S.T. & Murugesan, A. & Kumaravel, A., 2016. "Tyre pyrolysis oil as an alternative fuel for diesel engines – A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 60(C), pages 1678-1685.
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    3. Choi, Gyung-Goo & Oh, Seung-Jin & Kim, Joo-Sik, 2016. "Scrap tire pyrolysis using a new type two-stage pyrolyzer: Effects of dolomite and olivine on producing a low-sulfur pyrolysis oil," Energy, Elsevier, vol. 114(C), pages 457-464.
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    5. Choi, Gyung-Goo & Oh, Seung-Jin & Kim, Joo-Sik, 2016. "Non-catalytic pyrolysis of scrap tires using a newly developed two-stage pyrolyzer for the production of a pyrolysis oil with a low sulfur content," Applied Energy, Elsevier, vol. 170(C), pages 140-147.
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    2. Irina Glushankova & Aleksandr Ketov & Marina Krasnovskikh & Larisa Rudakova & Iakov Vaisman, 2019. "End of Life Tires as a Possible Source of Toxic Substances Emission in the Process of Combustion," Resources, MDPI, vol. 8(2), pages 1-10, June.
    3. Arabiourrutia, Miriam & Lopez, Gartzen & Artetxe, Maite & Alvarez, Jon & Bilbao, Javier & Olazar, Martin, 2020. "Waste tyre valorization by catalytic pyrolysis – A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 129(C).
    4. Bi, Rongshan & Zhang, Yan & Jiang, Xiao & Yang, Haixing & Yan, Kejia & Han, Min & Li, Wenhua & Zhong, Hua & Tan, Xinshun & Xia, Li & Sun, Xiaoyan & Xiang, Shuangguang, 2022. "Simulation and techno-economical analysis on the pyrolysis process of waste tire," Energy, Elsevier, vol. 260(C).
    5. Khodaei, Hassan & Gonzalez, Luis & Chapela, Sergio & Porteiro, Jacobo & Nikrityuk, Petr & Olson, Chris, 2021. "CFD-based coupled multiphase modeling of biochar production using a large-scale pyrolysis plant," Energy, Elsevier, vol. 217(C).

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