Mechanical and chemical recycling of solid plastic waste
Mechanical and chemical recycling of solid plastic waste
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DOI：
10.1016/j.wasman.2017.07.044
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发表时间：
2017-11-01
期刊：
影响因子：
8.1
通讯作者：
Van Geem, Kevin
中科院分区：
文献类型：
--
作者：
Ragaert, Kim;Delva, Laurens;Van Geem, Kevin
本文综述了目前通过机械和化学回收的聚合物回收途径。这些回收途径的原则是针对当今的工业现实，通过讨论主要的工业技术，设计策略和回收的具体废物流的例子。本文首先概述了固体塑料废物（SPW）的类型及其来源，然后讨论了SPW的不同价值评估方案。关于机械回收的部分概述了当前的分类技术，机械回收的具体挑战，如热机械或寿命降解以及聚合物混合物的不可降解性。它还包括一些工业实例，如聚对苯二甲酸乙二醇酯（PET）回收，以及消费后包装，报废车辆或电子设备的SPW。一个单独的部分致力于设计和回收之间的关系，强调概念的作用，如回收设计。关于化学品回收的部分收集了化学分解、热解、流化催化裂化、氢技术和气化等技术的最新进展。此外，本文还讨论了这些回收策略的主要挑战（和一些潜在的补救措施），并将其与相关的聚合物科学联系起来，从而提供了一个学术角度和应用角度。(C)2017爱思唯尔有限公司版权所有
This review presents a comprehensive description of the current pathways for recycling of polymers, via both mechanical and chemical recycling. The principles of these recycling pathways are framed against current-day industrial reality, by discussing predominant industrial technologies, design strategies and recycling examples of specific waste streams. Starting with an overview on types of solid plastic waste (SPW) and their origins, the manuscript continues with a discussion on the different valorisation options for SPW. The section on mechanical recycling contains an overview of current sorting technologies, specific challenges for mechanical recycling such as thermo-mechanical or lifetime degradation and the immiscibility of polymer blends. It also includes some industrial examples such as polyethylene terephthalate (PET) recycling, and SPW from post-consumer packaging, end-of-life vehicles or electr(on)ic devices. A separate section is dedicated to the relationship between design and recycling, emphasizing the role of concepts such as Design from Recycling. The section on chemical recycling collects a state-of-the-art on techniques such as chemolysis, pyrolysis, fluid catalytic cracking, hydrogen techniques and gasification. Additionally, this review discusses the main challenges (and some potential remedies) to these recycling strategies and ground them in the relevant polymer science, thus providing an academic angle as well as an applied one. (C) 2017 Elsevier Ltd. All rights reserved.