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

IF 2.8 4区化学 Q3 POLYMER SCIENCE

Journal of Polymer Research Pub Date : 2025-10-07 DOI:10.1007/s10965-025-04582-y

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

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Abstract

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 (E_a) of which were 177.3 kJ·mol⁻¹ and 182.9 kJ·mol⁻¹, respectively.

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粉煤灰沸石对聚对苯二甲酸乙二醇酯（PET）废塑料的热解动力学研究

PET瓶废弃物由PET瓶和PP塞组成。以酸、碱活化CFA得到的HY-FAZ为原料，研究了PET瓶废弃物的催化热解动力学。通过对含20% HY-FAZ和不含20% HY-FAZ的PET瓶废弃物进行热分析，并对其分解程度进行比较，考察粉煤灰的催化作用。热解温度在623 ~ 753 K范围内，HY-FAZ加速了废弃物的热解过程，挥发性气体产率提高了14.2%，固体渣产率降低了14.14%。在N2气氛中，以5、10、15和20 K·min−1 4种不同的升温速率，在313 ~ 923 K的温度范围内对HY-FAZ的热解进行了TG和DTG表征。采用FR、two、KAS、STK和DAEM五种方法研究了热解动力学。PET瓶废弃物在HY-FAZ催化剂上的热解反应分两个阶段进行，其活化能（Ea）分别为177.3 kJ·mol−1和182.9 kJ·mol−1。

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来源期刊

Journal of Polymer Research 化学-高分子科学

CiteScore

4.70

自引率

7.10%

发文量

472

审稿时长

3.6 months

期刊介绍： Journal of Polymer Research provides a forum for the prompt publication of articles concerning the fundamental and applied research of polymers. Its great feature lies in the diversity of content which it encompasses, drawing together results from all aspects of polymer science and technology. As polymer research is rapidly growing around the globe, the aim of this journal is to establish itself as a significant information tool not only for the international polymer researchers in academia but also for those working in industry. The scope of the journal covers a wide range of the highly interdisciplinary field of polymer science and technology, including: polymer synthesis; polymer reactions; polymerization kinetics; polymer physics; morphology; structure-property relationships; polymer analysis and characterization; physical and mechanical properties; electrical and optical properties; polymer processing and rheology; application of polymers; supramolecular science of polymers; polymer composites.