Co-pyrolysis of poly (lactic acid) and sesame stalk: Synergistic effect, kinetic and thermodynamic studies

IF 5.4 3区工程技术 Q2 ENERGY & FUELS

Thermal Science and Engineering Progress Pub Date : 2025-10-08 DOI:10.1016/j.tsep.2025.104191

Zhen Huang, Hong-da Ji, Yi Liu, Ying Wang, Zi-xin Wang, Yu-jiang Liu

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Abstract

For the study of the biomass effect on pyrolysis of plastic wastes, co-pyrolysis features and kinetics of poly (lactic acid) (PLA)/sesame straw hybrids have been investigated for the first time by experimental evaluation and theoretical analysis. Our results show that the onset pyrolysis temperatures of PLA have decreased considerably after blending with sesame straw and there is a considerable synergistic effect between two feedstocks. Based on nonisothermal results, kinetic analysis has been isoconversionally made by using integral and differential methods and their performances in obtaining activation energy are fully compared. The calculations show that the activation energies are 115.8∼150.1, 150.7∼210.1 and 132.2∼178.5 kJ/mol for the PLA mixtures with the sesame straw content 10, 20 and 30 mass%, respectively. The pre-exponential factor has been calculated model-freely with the use of the compensation effect while the reaction mechanism function has been appropriately determined by following the Master plots method. Additionally, thermodynamic analysis for the entire pyrolysis is also done in terms of enthalpy, entropy and Gibbs free energy changes. Overall, the results acquired from this work may open up new avenues for thermally disposing waste plastics and advancing sustainable energy generation.

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聚乳酸与芝麻秸秆共热解：协同效应、动力学和热力学研究

为研究生物质对塑料废弃物热解的影响，通过实验评价和理论分析，首次对聚乳酸/芝麻秸秆杂交物共热解特性和动力学进行了研究。结果表明，与芝麻秸秆共混后，PLA的起始热解温度明显降低，两种原料之间存在明显的协同效应。在非等温结果的基础上，用积分法和微分法等转换进行了动力学分析，并比较了它们在求活化能方面的性能。计算表明，芝麻秸秆含量为10、20和30质量%时，PLA混合物的活化能分别为115.8 ~ 150.1、150.7 ~ 210.1和132.2 ~ 178.5 kJ/mol。利用补偿效应模型自由地计算了指数前因子，并采用主图法确定了反应机理函数。此外，还对整个热解过程进行了焓、熵和吉布斯自由能变化的热力学分析。总的来说，从这项工作中获得的结果可能为热处理废塑料和推进可持续能源生产开辟新的途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Thermal Science and Engineering Progress Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

7.20

自引率

10.40%

发文量

327

审稿时长

41 days

期刊介绍： Thermal Science and Engineering Progress (TSEP) publishes original, high-quality research articles that span activities ranging from fundamental scientific research and discussion of the more controversial thermodynamic theories, to developments in thermal engineering that are in many instances examples of the way scientists and engineers are addressing the challenges facing a growing population – smart cities and global warming – maximising thermodynamic efficiencies and minimising all heat losses. It is intended that these will be of current relevance and interest to industry, academia and other practitioners. It is evident that many specialised journals in thermal and, to some extent, in fluid disciplines tend to focus on topics that can be classified as fundamental in nature, or are ‘applied’ and near-market. Thermal Science and Engineering Progress will bridge the gap between these two areas, allowing authors to make an easy choice, should they or a journal editor feel that their papers are ‘out of scope’ when considering other journals. The range of topics covered by Thermal Science and Engineering Progress addresses the rapid rate of development being made in thermal transfer processes as they affect traditional fields, and important growth in the topical research areas of aerospace, thermal biological and medical systems, electronics and nano-technologies, renewable energy systems, food production (including agriculture), and the need to minimise man-made thermal impacts on climate change. Review articles on appropriate topics for TSEP are encouraged, although until TSEP is fully established, these will be limited in number. Before submitting such articles, please contact one of the Editors, or a member of the Editorial Advisory Board with an outline of your proposal and your expertise in the area of your review.