Department of Plastics Engineering, University of Massachusetts Lowell, Lowell, MA 01851, USA.
Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, 10607, Taiwan.
ChemSusChem. 2022 Jun 8;15(11):e202200171. doi: 10.1002/cssc.202200171. Epub 2022 May 9.
Plastic waste is an emerging environmental issue for our society. Critical action to tackle this problem is to upcycle plastic waste as valuable feedstock. Thermochemical conversion of plastic waste has received growing attention. Although thermochemical conversion is promising for handling mixed plastic waste, it typically occurs at high temperatures (300-800 °C). Catalysts can play a critical role in improving the energy efficiency of thermochemical conversion, promoting targeted reactions, and improving product selectivity. This Review aims to summarize the state-of-the-art of catalytic thermochemical conversions of various types of plastic waste. First, general trends and recent development of catalytic thermochemical conversions including pyrolysis, gasification, hydrothermal processes, and chemolysis of plastic waste into fuels, chemicals, and value-added materials were reviewed. Second, the status quo for the commercial implementation of thermochemical conversion of plastic waste was summarized. Finally, the current challenges and future perspectives of catalytic thermochemical conversion of plastic waste including the design of sustainable and robust catalysts were discussed.
塑料废物是我们社会面临的一个新出现的环境问题。解决这个问题的关键行动是将塑料废物升级循环为有价值的原料。塑料废物的热化学转化受到了越来越多的关注。虽然热化学转化在处理混合塑料废物方面具有广阔的前景，但它通常在高温（300-800°C）下进行。催化剂在提高热化学转化的能源效率、促进目标反应和提高产品选择性方面可以发挥关键作用。本综述旨在总结各种类型塑料废物的催化热化学转化的最新进展。首先，综述了包括热解、气化、水热过程和塑料废物化学解为燃料、化学品和增值材料在内的催化热化学转化的一般趋势和最新发展。其次，总结了塑料废物热化学转化的商业实施现状。最后，讨论了催化热化学转化塑料废物的当前挑战和未来展望，包括设计可持续和稳健的催化剂。
