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Characteristics of two-stage air gasification of polystyrene with active carbon as a tar removal agent

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  • Jeong, Yong-Seong
  • Kim, Jong-Woo
  • Seo, Myung-Won
  • Mun, Tae-Young
  • Kim, Joo-Sik

Abstract

Air gasification of polystyrene was conducted using a two-stage gasifier consisting of a fluidized bed and a tar-cracking reactor filled with active carbon. The aim was to obtain a hydrogen-rich producer gas with a low level of tar. In addition to the possibility of tar removal, the effects of the reaction temperature and equivalence ratio on the producer gas quality were investigated. In this study, it was found that the gasification of polystyrene had different characteristics to the gasification of other plastic, resulting in a high production of char. Active carbon played a crucial role, significantly decreasing the tar content in gas to 11 mg/Nm3. Furthermore, gasification with active carbon produced a gas having a high content of hydrogen (26 vol%). The change in fluidized bed gasifier temperature within the range of 700–900 °C exerted no significant effects on the gas quality. In contrast, a high tar-cracking reactor temperature clearly increased hydrogen and carbon monoxide contents. With an increasing equivalence ratio, oxidation of char was promoted, resulting in a significant increase in gas production and carbon oxides. The current study showed a good possibility for the recycling of polystyrene via gasification, producing a clean and hydrogen-rich gas.

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  • Jeong, Yong-Seong & Kim, Jong-Woo & Seo, Myung-Won & Mun, Tae-Young & Kim, Joo-Sik, 2021. "Characteristics of two-stage air gasification of polystyrene with active carbon as a tar removal agent," Energy, Elsevier, vol. 219(C).
    • Handle: RePEc:eee:energy:v:219:y:2021:i:c:s0360544220327882
    DOI: 10.1016/j.energy.2020.119681
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    References listed on IDEAS

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    9. Jeong, Yong-Seong & Choi, Young-Kon & Park, Ki-Bum & Kim, Joo-Sik, 2019. "Air co-gasification of coal and dried sewage sludge in a two-stage gasifier: Effect of blending ratio on the producer gas composition and tar removal," Energy, Elsevier, vol. 185(C), pages 708-716.
    10. Wang, Shuxiao & Shan, Rui & Lu, Tao & Zhang, Yuyuan & Yuan, Haoran & Chen, Yong, 2020. "Pyrolysis char derived from waste peat for catalytic reforming of tar model compound," Applied Energy, Elsevier, vol. 263(C).
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    2. Jeong, Yong-Seong & Mun, Tae-Young & Kim, Joo-Sik, 2022. "Two-stage gasification of dried sewage sludge: Effects of gasifying agent, bed material, gas cleaning system, and Ni-coated distributor on product gas quality," Renewable Energy, Elsevier, vol. 185(C), pages 208-216.
    3. Tatyana Iglina & Pavel Iglin & Dmitry Pashchenko, 2022. "Industrial CO 2 Capture by Algae: A Review and Recent Advances," Sustainability, MDPI, vol. 14(7), pages 1-26, March.
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    5. Kim, Jae-Kyung & Jeong, Yong-Seong & Kim, Jong-Woo & Kim, Joo-Sik, 2023. "Two-stage thermochemical conversion of polyethylene terephthalate using steam to produce a clean and H2- and CO-rich syngas," Energy, Elsevier, vol. 276(C).
    6. Chen, Zhijie & Wei, Wei & Chen, Xueming & Liu, Yiwen & Shen, Yansong & Ni, Bing-Jie, 2024. "Upcycling of plastic wastes for hydrogen production: Advances and perspectives," Renewable and Sustainable Energy Reviews, Elsevier, vol. 195(C).

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