Fundamental, technical and environmental overviews of plastic chemical recycling†

IF 9.3 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Green Chemistry Pub Date : 2024-10-22 DOI:10.1039/d4gc03127j

Hui Luo , Helen Tyrrell , Jingyang Bai , Rukayya Ibrahim Muazu , Xiangyi Long

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Abstract

The accumulation of plastic waste is a severe environmental challenge worldwide. Although mechanical recycling methods are in place for plastics such as polyethylene terephthalate (PET), the physical and chemical properties are significantly compromised after a number of cycles, and they eventually reach end-of-life and end up in landfill. Chemical recycling is a collection of emerging innovative technologies that transform plastic waste into base chemicals, monomers and feedstocks. This approach complements mechanical recycling, bridging the gap between waste management and the petrochemical industry. However, with regard to the seven types of recyclable plastic, there is currently no clear overview of the suitable techniques. Therefore, we aim to provide a critical perspective on the suitability of different chemical processes towards recycling different types of plastic, by combining fundamental knowledge and research advancements in recent years, with an emphasis on assessing their environmental and economic impacts. Finally, based on the development status, we will highlight the current challenges and future opportunities in implementing chemical recycling technologies to meet the sustainability requirement of a climate-neutral circular economy.

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塑料化学品回收利用的基础、技术和环境概述†。

塑料废物的积累是全球面临的严峻环境挑战。尽管对聚对苯二甲酸乙二酯（PET）等塑料采用了机械回收方法，但经过多次循环后，其物理和化学性质会受到严重影响，最终达到报废年限，被填埋。化学回收是一系列新兴的创新技术，可将塑料废弃物转化为基础化学品、单体和原料。这种方法与机械回收相辅相成，在废物管理和石化工业之间架起了一座桥梁。然而，对于七种可回收塑料，目前还没有合适技术的明确概述。因此，我们希望通过结合基础知识和近年来的研究进展，对不同化学工艺在回收不同类型塑料方面的适用性提供一个批判性的视角，并重点评估其对环境和经济的影响。最后，根据发展现状，我们将强调在实施化学回收技术以满足气候中和循环经济的可持续性要求方面，当前面临的挑战和未来的机遇。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Green Chemistry 化学-化学综合

CiteScore

16.10

自引率

7.10%

发文量

677

审稿时长

1.4 months

期刊介绍： Green Chemistry is a journal that provides a unique forum for the publication of innovative research on the development of alternative green and sustainable technologies. The scope of Green Chemistry is based on the definition proposed by Anastas and Warner (Green Chemistry: Theory and Practice, P T Anastas and J C Warner, Oxford University Press, Oxford, 1998), which defines green chemistry as the utilisation of a set of principles that reduces or eliminates the use or generation of hazardous substances in the design, manufacture and application of chemical products. Green Chemistry aims to reduce the environmental impact of the chemical enterprise by developing a technology base that is inherently non-toxic to living things and the environment. The journal welcomes submissions on all aspects of research relating to this endeavor and publishes original and significant cutting-edge research that is likely to be of wide general appeal. For a work to be published, it must present a significant advance in green chemistry, including a comparison with existing methods and a demonstration of advantages over those methods.