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Three-stage air gasification of waste polyethylene: In-situ regeneration of active carbon used as a tar removal additive

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  • Jeong, Yong-Seong
  • Choi, Young-Kon
  • Kim, Joo-Sik

Abstract

Air gasification of waste polyethylene (PE) was conducted using active carbon as a tar removal agent in a new type of three-stage gasifier. The main focus was on the in-situ regeneration of active carbon, which was conducted simply with air treatment, which was mainly performed with variations of treatment time and air flow rate. In the experiments, active carbon was found to be very effective in hydrogen production and tar removal. The maximum hydrogen content of the producer gas obtained with active carbon was approximately 27 vol%, while the producer gas was free of tar. Active carbon, treated with air for 10 min, while stopping feeding, had a surface area of 937 m2/g (83% recovery rate). A 4 h of gasification performed with a dolomite guard bed and a mesh type distributor produced a gas having H2 and heavier tar than toluene contents of 28 and 0 vol%, respectively. The regeneration study suggested that a severe coke formation could be diminished, when methods such as frequent air regeneration with short treatment time, the use of other regeneration agents, such as CO2 or H2O and/or the selection of a proper distributor would be applied.

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  • Jeong, Yong-Seong & Choi, Young-Kon & Kim, Joo-Sik, 2019. "Three-stage air gasification of waste polyethylene: In-situ regeneration of active carbon used as a tar removal additive," Energy, Elsevier, vol. 166(C), pages 335-342.
    • Handle: RePEc:eee:energy:v:166:y:2019:i:c:p:335-342
    DOI: 10.1016/j.energy.2018.10.086
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    References listed on IDEAS

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    1. Cho, Min-Hwan & Mun, Tae-Young & Choi, Young-Kon & Kim, Joo-Sik, 2014. "Two-stage air gasification of mixed plastic waste: Olivine as the bed material and effects of various additives and a nickel-plated distributor on the tar removal," Energy, Elsevier, vol. 70(C), pages 128-134.
    2. Machin, Einara Blanco & Pedroso, Daniel Travieso & Proenza, Nestor & Silveira, José Luz & Conti, Leonetto & Braga, Lúcia Bollini & Machin, Adrian Blanco, 2015. "Tar reduction in downdraft biomass gasifier using a primary method," Renewable Energy, Elsevier, vol. 78(C), pages 478-483.
    3. Nakamura, Shunsuke & Kitano, Shigeru & Yoshikawa, Kunio, 2016. "Biomass gasification process with the tar removal technologies utilizing bio-oil scrubber and char bed," Applied Energy, Elsevier, vol. 170(C), pages 186-192.
    4. Cho, Min-Hwan & Mun, Tae-Young & Kim, Joo-Sik, 2013. "Air gasification of mixed plastic wastes using calcined dolomite and activated carbon in a two-stage gasifier to reduce tar," Energy, Elsevier, vol. 53(C), pages 299-305.
    5. Cho, Min-Hwan & Choi, Young-Kon & Kim, Joo-Sik, 2015. "Air gasification of PVC (polyvinyl chloride)-containing plastic waste in a two-stage gasifier using Ca-based additives and Ni-loaded activated carbon for the production of clean and hydrogen-rich prod," Energy, Elsevier, vol. 87(C), pages 586-593.
    6. Al-Rahbi, Amal S. & Williams, Paul T., 2017. "Hydrogen-rich syngas production and tar removal from biomass gasification using sacrificial tyre pyrolysis char," Applied Energy, Elsevier, vol. 190(C), pages 501-509.
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    Cited by:

    1. Igor Donskoy, 2023. "Particle Agglomeration of Biomass and Plastic Waste during Their Thermochemical Fixed-Bed Conversion," Energies, MDPI, vol. 16(12), pages 1-25, June.
    2. 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).
    3. 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).
    4. Choi, Min-Jun & Jeong, Yong-Seong & Kim, Joo-Sik, 2021. "Air gasification of polyethylene terephthalate using a two-stage gasifier with active carbon for the production of H2 and CO," Energy, Elsevier, vol. 223(C).
    5. Jeong, Yong-Seong & Park, Ki-Bum & Kim, Joo-Sik, 2020. "Hydrogen production from steam gasification of polyethylene using a two-stage gasifier and active carbon," Applied Energy, Elsevier, vol. 262(C).
    6. Šuhaj, Patrik & Husár, Jakub & Haydary, Juma & Annus, Július, 2022. "Experimental verification of a pilot pyrolysis/split product gasification (PSPG) unit," Energy, Elsevier, vol. 244(PA).
    7. Zeng, Xi & Wang, Fang & Han, Zhennan & Han, Jiangze & Zhang, Jianling & Wu, Rongcheng & Xu, Guangwen, 2019. "Assessment of char property on tar catalytic reforming in a fluidized bed reactor for adopting a two-stage gasification process," Applied Energy, Elsevier, vol. 248(C), pages 115-125.
    8. Huang, Zhen & Zheng, Anqing & Deng, Zhengbing & Wei, Guoqiang & Zhao, Kun & Chen, Dezhen & He, Fang & Zhao, Zengli & Li, Haibin & Li, Fanxing, 2020. "In-situ removal of toluene as a biomass tar model compound using NiFe2O4 for application in chemical looping gasification oxygen carrier," Energy, Elsevier, vol. 190(C).

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