建筑行业中碳纤维的回收潜力:从技术和生态的角度来看
Berfin Bayram1, Vanessa Overhage2, Marco Löwen3
1Department of Anthropogenic Material Cycles, RWTH Aachen University, Aachen, Germany.
概括
来自热解的回收碳纤维 (rCFs) 可以从混凝土中分离出来,为原始碳纤维 (CFs) 提供了一个有利于环境的替代品. 使用rCF显著降低了材料生产中的全球变暖潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 可持续工程 可持续工程
- 回收技术的回收技术
背景情况:
- 碳纤维 (CFs) 越来越多地被使用,但它们的寿命终止 (EOL) 管理带来了重大的环境挑战.
- 热解提供了一种生产适合重复使用的回收碳纤维 (rCF) 的方法.
研究的目的:
- 为了评估使用烧解再生碳纤维 (rCFs) 作为织增强混凝土中的 rovings 的有效性.
- 评估用于将rCFs与混凝土分离的机械加工方法,并分析其特性.
- 进行技术环境和生命周期评估 (LCA),将rCF与原始CF进行比较.
主要方法:
- 回收碳纤维 (rCFs) 通过热解产生,并纳入混凝土结构.
- 使用各种设置的子磨坊进行机械加工,以分离rCFs.
- 进行了技术环境评估和生命周期评估 (LCA),以评估过程,并将rCF与原始CF进行比较.
主要成果:
- 平均而言,87%的rCF rovings可以成功地从混凝土中分离出来.
- 为了最大限度地提高rCF分离产量和长度,最佳的机器设置不同.
- rCF rovings 的最高产量与最高细分数相对应,表明分离的限制.
- 生命周期评估显示,原始CF生产的全球变暖潜力比rCF生产高230%.
结论:
- 回收碳纤维 (rCFs) 是织物钢筋混凝土的可行材料,通过机械加工可以实现有效的分离.
- 使用RCF具有显著的环境效益,主要是通过与原始CF相比,大幅减少全球变暖潜力.
- 需要进一步的研究来完善RCF质量评估和LCA方法,包括分配方法.
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