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在英国使用分布式模型探索化学回收的潜力 - - 一个生命周期评估的角度

Suviti Chari¹, Andrea Paulillo¹, Massimiliano Materazzi¹

¹Department of Chemical Engineering, University College London, London WC1E 7JE, UK.

Waste management (New York, N.Y.)

|March 8, 2025

概括

英国的塑料废物的化学回收利用小规模热解可显著减少温室气体排放. 这一过程为传统的废物管理和原始塑料生产提供了可行的替代方案,尽管存在一些环境权衡.

科学领域:

环境科学环境科学
化学工程是化学工程的重要组成部分.
材料科学材料科学材料科学

背景情况:

增加的塑料生产需要超越机械方法的先进回收解决方案.
化学回收 (CR) 为复杂的塑料废物流提供了一个补充的方法.
具有现场升级的分散式热解是一种新的CR策略.

研究的目的:

在英国,对一家小型的,分散的化学回收工厂进行生命周期评估 (LCA).
评估将混合塑料废弃物 (MPW) 转化为油的环境影响.
为了将CR与传统废物管理和原始塑料生产进行比较.

主要方法:

一个165公斤/小时的热解装置的生命周期评估 (LCA).
从废物和产品的角度进行评估.
与废物转化为能源,混合寿命末期场景和初始塑料生产的比较.

主要成果:

化学回收将气候变化影响减少1284公斤的CO2eq/,而不是废物转化为能源.
CR显示430公斤的二氧化碳等值/的影响比混合寿命终止管理低.
与原始塑料生产相比,化学回收的油可以显著减少影响.

结论:

化学回收是减少温室气体排放的可行途径.
小规模的,分散的CR工厂显示出潜力,但面临着副产品影响的挑战.
进一步优化和政策支持对于推进化学回收至关重要.

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