Advances and approaches for chemical recycling of plastic waste,Journal of Polymer Science

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Advances and approaches for chemical recycling of plastic waste
Journal of Polymer Science ( IF 3.9 ) Pub Date : 2020-04-20 , DOI: 10.1002/pol.20190261
Timmy Thiounn ₁ , Rhett C. Smith ₁

Affiliation

The global production and consumption of plastics has increased at an alarming rate over the last few decades. The accumulation of pervasive and persistent waste plastic has concomitantly increased in landfills and the environment. The societal, ecological, and economic problems of plastic waste/pollution demand immediate and decisive action. In 2015, only 9% of plastic waste was successfully recycled in the United States. The major current recycling processes focus on the mechanical recycling of plastic waste; however, even this process is limited by the sorting/pretreatment of plastic waste and degradation of plastics during the process. An alternative to mechanical processes is chemical recycling of plastic waste. Efficient chemical recycling would allow for the production of feedstocks for various uses including fuels and chemical feedstocks to replace petrochemicals. This review focuses on the most recent advances for the chemical recycling of three major polymers found in plastic waste: PET, PE, and PP. Commercial processes for recycling hydrolysable polymers like polyesters or polyamides, polyolefins, or mixed waste streams are also discussed.

中文翻译：

塑料废物化学回收的进展和方法

在过去的几十年中，全球塑料的生产和消费以惊人的速度增长。在垃圾填埋场和环境中，普遍存在的持久性废塑料的积累随之增加。塑料废物/污染的社会，生态和经济问题需要立即采取果断行动。2015年，美国仅成功回收了9％的塑料废料。当前主要的回收过程集中在塑料废物的机械回收上。但是，即使这个过程也受到塑料废物的分类/预处理和过程中塑料降解的限制。机械过程的替代方法是化学废物的塑料回收。有效的化学循环利用将允许生产各种用途的原料，包括燃料和代替石化产品的化学原料。这篇综述着重介绍了塑料废料中发现的三种主要聚合物：PET，PE和PP的化学回收的最新进展。还讨论了回收可水解聚合物（如聚酯或聚酰胺，聚烯烃或混合废料流）的商业方法。

更新日期：2020-04-20

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