Abstract
AbstractIn this study, poly-lactic acid (PLA) and poly-3-hydroxybutyrate-co-3-hydroxyhexanoate (PHBH) were pyrolyzed at various temperatures (300, 350, 400, 500, 600, and 700 °C) and heating rates (5, 10, 20, 30, and 40 °C min−1) using a pyrolysis–gas chromatograph/mass spectrometer (Py–GC/MS). The results revealed that the main pyrolysis products of PLA were acetaldehyde, lactide (including meso-lactide and d-, l-lactide), and oligomers. Crotonic acid and its oligomers accounted for most of the PHBH pyrolyzates. The pyrolysis temperature significantly correlated with the product distribution, but the heating rate had a small effect on the product distribution. Lactide and crotonic acid were two kinds of high-value chemicals, and their highest yields were obtained at 400 and 600 °C with 29.7 and 72.6 area %, respectively. Secondary reactions could not be neglected at 700 °C, and acetaldehyde and crotonic acid decreased to 65.0 and 69.6 area %, respectively. These results imply that pyrolyzate selectivity can be controlled by temperature management during pyrolysis.
Funder
Environment Research and Technology Development Fund
Publisher
Springer Science and Business Media LLC
Subject
Mechanics of Materials,Waste Management and Disposal
Reference62 articles.
1. Plastics Europe (2020) Plastics—the facts 2020. Plastics Europe. https://plasticseurope.org/knowledge-hub/plastics-the-facts-2020/. Accessed 6 Jan 2021
2. Plastics Europe (2009) The compelling facts about plastics 2009—an analysis of European plastics production, demand and recovery for 2008. Plastics Europe. https://plasticseurope.org/wp-content/uploads/2021/10/2009-Compelling-facts.pdf. Accessed 6 Jan 2021
3. Clark JH (2017) From waste to wealth using green chemistry: the way to long term stability. Curr Opin Green Sustain Chem 8:10. https://doi.org/10.1016/j.cogsc.2017.07.008
4. Law KL, Starr N, Siegler TR, Jambeck JR, Mallos NJ, Leonard GH (2020) The United States’ contribution of plastic waste to land and ocean. Sci Adv 6:eabd0288. https://doi.org/10.1126/sciadv.abd0288
5. The People's Government of Beijing Municipal (2020) Beijing action plan for plastic pollution control (2020–2025). The People's Government of Beijing Municipal. http://www.beijing.gov.cn/zhengce/zhengcefagui/202012/t20201225_2185594.html. Accessed 6 Jan 2022
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