基于红外快速加热的塑料热解特性研究
Study on Pyrolysis Characteristics of Plastics Based on Infrared Rapid Heating
研究聚焦于废旧塑料热解处理,特别是红外快速加热技术在其中的应用潜力。采用固定床反应器,以低密度聚乙烯(LDPE)为模型塑料,系统探究升温速率与加热温度对热解产物分布及热解油组成的影响。结果显示,红外加热技术显著优化了热解过程,提高液态油产率,并影响热解油的化学组成。进一步地,在最优工艺参数(20 ℃/s,550 ℃)条件下,对比分析LDPE、高密度聚乙烯(HDPE)、聚丙烯(PP)、聚苯乙烯(PS)及聚对苯二甲酸乙二醇酯(PET)5种常见塑料的热解特性,揭示其热解行为的显著差异。LDPE与HDPE主要生成液态烃类产物,PS热解则高选择性地产生苯乙烯,而PET热解产物中苯甲酸占比较高,具有特殊的物理化学性质。研究不仅为塑料热解领域提供了新的实验数据,还强调了红外加热技术在提升塑料废弃物资源化利用效率方面的潜力,为未来的研究与实践提供参考。
The study focuses on the pyrolysis of plastic waste, particularly exploring the potential application of infrared rapid heating technology. Using a fixed-bed reactor and low-density polyethylene (LDPE) as a model plastic, the effects of heating rate and pyrolysis temperature on the product distribution and composition of pyrolysis oil were systematically investigated. The results demonstrate that infrared heating technology significantly optimizes the pyrolysis process, enhancing the liquid oil yield and altering the chemical composition of the pyrolysis oil. Furthermore, under optimal process parameters (20 ℃/s, 550 ℃), a comparative analysis of the pyrolysis characteristics of five common plastics, such as LDPE, high-density polyethylene (HDPE), polypropylene (PP), polystyrene (PS), and polyethylene terephthalate (PET), was conducted, revealing significant differences in their pyrolysis behaviors. LDPE and HDPE primarily produce liquid hydrocarbon products, while PS pyrolysis yields styrene with high selectivity. Furthermore, PET pyrolysis results in a higher proportion of benzoic acid in the products, possessing unique physicochemical properties. The study not only provides new experimental data for the field of plastic pyrolysis but also emphasizes the potential of infrared heating technology in enhancing the efficiency of plastic waste resource recovery. It offers scientific basis and technical reference for future research and practice.
| [1] |
|
| [2] |
|
| [3] |
|
| [4] |
|
| [5] |
赵洁, 宋春玲, 叶红, |
| [6] |
|
| [7] |
江珊, 刘红梅, 张蓝溪, |
| [8] |
|
| [9] |
孙艺蕾, 马跃, 李术元, |
| [10] |
|
| [11] |
|
| [12] |
|
| [13] |
|
| [14] |
贺兴处, 陈德珍. 典型聚乙烯、聚丙烯、聚苯乙烯废塑料共热解初期反应特性的ReaxFF分子模拟研究[J]. 燃料化学学报, 2022, 50(3): 346-356. |
| [15] |
|
| [16] |
|
| [17] |
|
| [18] |
|
| [19] |
|
| [20] |
|
| [21] |
|
| [22] |
|
| [23] |
|
| [24] |
隋毅, 姜浩, 闫玉麟. 红外加热固定床油页岩热解特性研究[J]. 化学工程师, 2023, 37(9): 100-103. |
| [25] |
|
| [26] |
|
| [27] |
|
| [28] |
|
| [29] |
|
| [30] |
|
国家自然科学基金企业创新发展联合基金重点支持项目(U24B20198)
/
| 〈 |
|
〉 |