Huang Zhigang, Wu Jiahui, Yang Tenglun, Wang Zihan, Zhang Tong, Gao Fei, Yang Li, Li Gang
School of Computer and Artificial Intelligence, Beijing Technology and Business University, Haidian District, Beijing 100048, China.
Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics, Beijing Technology and Business University, No. 11 Fuchenglu, Haidian District, Beijing 100048, China.
Foods. 2024 Apr 13;13(8):1191. doi: 10.3390/foods13081191.
The impact of COVID-19 has boosted growth in the takeaway and medical industries but has also generated a large amount of plastic waste. Peanut shells (PS) are produced in large quantities and are challenging to recycle in China. Co-pyrolysis of peanut shells (PS) and polypropylene (PP) is an effective method for processing plastic waste and energy mitigation. Thermogravimetric analysis was conducted on PS, PP, and their blends (PS-PP) at different heating rates (10, 20, 30 °C·min). The results illustrated that the co-pyrolysis process of PS-PP was divided into two distinct decomposition stages. The first stage (170-400 °C) was predominantly linked to PS decomposition. The second stage (400-520 °C) resulted from the combinations of PS and PP's thermal degradations, with the most contribution from PP degradation. With the increase in heating rate, thermogravimetric hysteresis appeared. Kinetic analysis indicated that the co-pyrolysis process reduced the individual pyrolysis activation energy, especially in the second stage, with a correlation coefficient (R) generally maintained above 0.95. The multi-level reaction mechanism function model can effectively reveal the co-pyrolysis process mechanism. PS proved to be high-quality biomass for co-pyrolysis with PP, and all mixtures exhibited synergistic effects at a mixing ratio of 1:1 (PS1-PP1). This study accomplished effective waste utilization and optimized energy consumption. It holds significance in determining the interaction mechanism of mixed samples in the co-pyrolysis process.
新冠疫情的影响推动了外卖和医疗行业的发展，但也产生了大量塑料垃圾。花生壳在中国产量巨大且回收困难。花生壳（PS）与聚丙烯（PP）共热解是处理塑料垃圾和缓解能源问题的有效方法。在不同升温速率（10、20、30℃·min）下对花生壳、聚丙烯及其混合物（PS-PP）进行了热重分析。结果表明，PS-PP的共热解过程分为两个明显的分解阶段。第一阶段（170-400℃）主要与花生壳分解有关。第二阶段（400-520℃）是花生壳和聚丙烯热降解共同作用的结果，其中聚丙烯降解贡献最大。随着升温速率的增加，出现了热重滞后现象。动力学分析表明，共热解过程降低了各自的热解活化能，尤其是在第二阶段，相关系数（R）一般保持在0.95以上。多级反应机理函数模型能有效揭示共热解过程机理。花生壳被证明是与聚丙烯共热解的优质生物质，所有混合物在1:1（PS1-PP1）的混合比例下均表现出协同效应。本研究实现了有效的废物利用并优化了能源消耗。它对于确定共热解过程中混合样品的相互作用机理具有重要意义。
