推进多层薄膜回收的循环性:平衡质量和可持续性
Milad Golkaram1, Rajesh Mehta1, Sami Zakarya2
1Netherlands Organization for Applied Scientific Research (TNO), Princetonlaan 8, 3584 CB Utrecht, The Netherlands.
Polymers
|November 13, 2025
概括
回收多层薄膜 (MLF) 是一个复杂的过程. 先进的方法提高了回收材料的质量,但需要更高的回收含量目标,以显著减少温室气体排放并提高可持续性.
科学领域:
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 多层薄膜 (MLF) 的回收在实现循环经济目标方面面临重大障碍.
- 现有的回收方法,如机械,溶解和溶解,都有局限性.
- 提高MLF回收的质量对于其更广泛的应用至关重要.
研究的目的:
- 评估先进的试点规模的过程,以提高MLF回收物质的质量.
- 评估不同MLF回收路径和回收含量水平对环境的影响,特别是温室气体 (GHG) 排放.
- 挑战当前的回收内容目标,并提出更雄心勃勃的可持续发展目标.
主要方法:
- 实施先进的试点规模工艺,包括近红外/数字水印 (NIR/DW),超临界二氧化碳去污,溶解和创新的机械回收技术 (METEOR和多纳米层,MNL).
- 评估两种回收路径:基于溶解的和基于METEOR/MNL的.
- 生命周期评估 (LCA),重点关注各种MLF成分和回收内容百分比的温室气体 (GHG) 排放.
主要成果:
- 先进的回收工艺提高了MLF回收的质量.
- 回收PET/PE和含有10%回收物质的金属化PP薄膜可能会增加温室气体排放,而不是垃圾填埋场焚烧.
- 在PE/PA和PE/EVOH薄膜中,在10%的回收含量下,温室气体减少率分别为0.5%和4%.
- 将回收材料的含量从0%提高到50%,可以将温室气体排放量减少36%.
结论:
- 通过先进的回收技术,可以提高MLF回收的质量.
- 目前的低回收含量目标 (例如,10%) 可能不会产生显著的环境效益,甚至可以增加某些MLF类型的温室气体排放.
- 建议制定一个更雄心勃勃的目标,即到2050年超过25%的回收含量,以实现大幅减少温室气体并提高MLF回收的可持续性.
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