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<p>The PET bottle waste consists of PET bottle and PP plug. We investigated the catalytic pyrolysis kinetics of PET bottle waste using HY-FAZ obtained by activating CFA with acid and alkali. The catalytic effect of coal fly ash was investigated by thermal analysis of PET bottle waste with and without HY-FAZ of 20%, respectively, and comparison of degree of decomposition. Pyrolysis occurred in a temperature range of 623–753&#xa0;K, and it was confirmed that HY-FAZ accelerated the pyrolysis process of waste, increasing the yield of volatile gas by 14.2% and decreasing the yield of solid residue by 14.14%. The pyrolysis with the HY-FAZ was characterized using TG and DTG in a temperature range of 313–923&#xa0;K in N<sub>2</sub> atmosphere at four different heating rates (5, 10, 15 and 20&#xa0;K·min<sup>−1</sup>). The pyrolysis kinetics was investigated with five methods (FR, FWO, KAS, STK and DAEM). The pyrolysis reaction of PET bottle waste with HY-FAZ catalyst was carried out in two stages, the activation energies (E<sub>a</sub>) of which were 177.3&#xa0;kJ·mol<sup>−1</sup> and 182.9&#xa0;kJ·mol<sup>−1</sup>, respectively.</p>

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Pyrolysis kinetics of polyethylene terephthalate (PET) plastic bottle waste with coal fly ash zeolite

  • 期刊论文

  • 发表日期：

    2025年10月7日

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  • Ryo Hua Ho,
  • Ju Won Ri,
  • Jong Ryul Ri,
  • Songchol Hong

摘要

The PET bottle waste consists of PET bottle and PP plug. We investigated the catalytic pyrolysis kinetics of PET bottle waste using HY-FAZ obtained by activating CFA with acid and alkali. The catalytic effect of coal fly ash was investigated by thermal analysis of PET bottle waste with and without HY-FAZ of 20%, respectively, and comparison of degree of decomposition. Pyrolysis occurred in a temperature range of 623–753 K, and it was confirmed that HY-FAZ accelerated the pyrolysis process of waste, increasing the yield of volatile gas by 14.2% and decreasing the yield of solid residue by 14.14%. The pyrolysis with the HY-FAZ was characterized using TG and DTG in a temperature range of 313–923 K in N2 atmosphere at four different heating rates (5, 10, 15 and 20 K·min−1). The pyrolysis kinetics was investigated with five methods (FR, FWO, KAS, STK and DAEM). The pyrolysis reaction of PET bottle waste with HY-FAZ catalyst was carried out in two stages, the activation energies (Ea) of which were 177.3 kJ·mol−1 and 182.9 kJ·mol−1, respectively.