PMID- 33932851 OWN - NLM STAT- MEDLINE DCOM- 20210525 LR - 20210525 IS - 1879-2456 (Electronic) IS - 0956-053X (Linking) VI - 127 DP - 2021 May 15 TI - Catalytic pyrolysis of petroleum-based and biodegradable plastic waste to obtain high-value chemicals. PG - 101-111 LID - S0956-053X(21)00222-1 [pii] LID - 10.1016/j.wasman.2021.04.024 [doi] AB - The petroleum-based plastics, high-density polyethylene (HDPE), low-density polyethylene (LDPE), and polypropylene (PP), and the biodegradable plastic, polylactide (PLA) were processed by thermal and catalytic pyrolysis to investigate their suitability as feedstock for chemical recycling. The influence of pyrolysis temperature (400-600 degrees C) and catalyst (zeolite, spent FCC, and MgO catalyst) on the pyrolysis liquid composition and yield was studied. The studied petroleum-based plastics had similar decomposition temperature ranges but produced their highest pyrolysis yields at different temperatures. Pyrolysis liquids from thermal degradation of HDPE and LDPE consisted high yield of waxes but those of PP and PLA consisted of both waxes and liquid oil. Catalysts affected not only the pyrolysis yield, but also the proportions of liquid oil and wax in pyrolysis liquids. Alkenes, alkanes, and aromatics were the main compounds in the pyrolysis liquids. Spent FCC catalyst reduced the production of waxes and increased the production of gasoline-range hydrocarbons and aromatics. MgO catalyst led to high coke formation from polyolefins and PLA. Lactic acid, lactide and propanoic acid were examples of valuable chemicals recovered from the pyrolysis of PLA. Lactide was the main product (up to 79%) of catalytic pyrolysis with zeolite at 400 degrees C. Spent FCC catalyst produced mostly propanoic acid at 400 degrees C but at 600 degrees C, L-lactic acid became the most abundant compound. CI - Copyright (c) 2021 Elsevier Ltd. All rights reserved. FAU - Saeaung, Koranit AU - Saeaung K AD - Energy and Materials for Sustainability (EMS) Research Group, Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand. FAU - Phusunti, Neeranuch AU - Phusunti N AD - Energy and Materials for Sustainability (EMS) Research Group, Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand; Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand. Electronic address: neeranuch.p@psu.ac.th. FAU - Phetwarotai, Worasak AU - Phetwarotai W AD - Energy and Materials for Sustainability (EMS) Research Group, Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand. FAU - Assabumrungrat, Suttichai AU - Assabumrungrat S AD - Center of Excellence in Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand; Bio-Circular-Green-economy Technology & Engineering Center, BCGeTEC, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand. Electronic address: suttichai.a@chula.ac.th. FAU - Cheirsilp, Benjamas AU - Cheirsilp B AD - Biotechnology for Bioresource Utilization Laboratory, Department of Industrial Biotechnology, Faculty of Agro-Industry, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand. Electronic address: benjamas.che@psu.ac.th. LA - eng PT - Journal Article DEP - 20210428 PL - United States TA - Waste Manag JT - Waste management (New York, N.Y.) JID - 9884362 RN - 0 (Biodegradable Plastics) RN - 0 (Petroleum) RN - 0 (Plastics) SB - IM MH - *Biodegradable Plastics MH - Catalysis MH - *Petroleum MH - Plastics MH - Pyrolysis MH - Recycling OTO - NOTNLM OT - Catalytic pyrolysis OT - Petroleum-based plastics OT - Plastic wastes OT - Polylactide OT - Spent FCC OT - Zeolite COIS- Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. EDAT- 2021/05/02 06:00 MHDA- 2021/05/26 06:00 CRDT- 2021/05/01 20:23 PHST- 2020/08/24 00:00 [received] PHST- 2021/04/09 00:00 [revised] PHST- 2021/04/10 00:00 [accepted] PHST- 2021/05/02 06:00 [pubmed] PHST- 2021/05/26 06:00 [medline] PHST- 2021/05/01 20:23 [entrez] AID - S0956-053X(21)00222-1 [pii] AID - 10.1016/j.wasman.2021.04.024 [doi] PST - ppublish SO - Waste Manag. 2021 May 15;127:101-111. doi: 10.1016/j.wasman.2021.04.024. Epub 2021 Apr 28.