Economic and Environmental Benefits of Modular Microwave-Assisted Polyethylene Terephthalate Depolymerization
Economic and Environmental Benefits of Modular Microwave-Assisted Polyethylene Terephthalate Depolymerization
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DOI：
10.1021/acssuschemeng.2c07203
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发表时间：
2023-02-23
影响因子：
8.4
通讯作者：
Ierapetritou, Marianthi
中科院分区：
文献类型：
--
作者：
Luo, Yuqing;Selvam, Esun;Ierapetritou, Marianthi
越来越多的塑料垃圾危及环境。聚对苯二甲酸乙二醇酯（PET）是最广泛使用的塑料之一，因为它广泛用于纤维和包装。最近，化学回收和升级回收的方法已被提出，以生产有价值的产品，从捆聚酯原料。这项工作进行了技术经济分析和生命周期评估，以评估各种技术的环境和经济性能，包括在多相催化剂上通过微波电气化。我们证明了使用微波辅助的非均相糖酵解工艺生产对苯二甲酸二甲酯（2-羟乙基）（BHET）可以比传统的对苯二甲酸二甲酯（DMT）路线具有更低的生产成本和排放，因为催化剂的高反应性和良好的可重复使用性。该工艺反应速度快，选择性高，是有效处理空间分布PET废弃物的理想工艺。
The growing amount of plastic waste endangers the environment. Polyethylene terephthalate (PET) is among the most widespread plastics due to its extensive use in fibers and packaging. Recently, chemical recycling and upcycling approaches have been proposed to produce valuable products from bale PET feedstocks. This work performs techno-economic analysis and life cycle assessment to evaluate the environmental and economic performances of various technologies, including electrification via microwaves over a heterogeneous catalyst. We demonstrate that using a microwave-assisted heterogeneous glycolysis process to produce bis(2-hydroxyethyl) terephthalate (BHET) could have lower production costs and emissions than the traditional dimethyl terephthalate (DMT) route due to the high reactivity and excellent reusability of the catalyst. The fast reaction rate and high selectivity render this process ideal for handling spatially distributed PET waste effectively.