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Title	Chemical upcycling of waste polyolefinic plastics to low-carbon synthetic naphtha for closing the plastic use loop
ID_Doc	17103
Authors	Dai, LL; Zhou, N; Lv, YC; Cheng, YL; Wang, YP; Liu, YH; Cobb, K; Chen, P; Lei, HW; Ruan, R
Title	Chemical upcycling of waste polyolefinic plastics to low-carbon synthetic naphtha for closing the plastic use loop
Year	2021
Published
Abstract	Designing an effective pathway to remove waste plastics from landfill and incineration plants and create a circular economy requires a more appropriate technology beyond the conventional mechanical recycling by melting and re-molding. This study aims to convert waste plastic into low-carbon synthetic naphtha which can be used as a feedstock for new plastic production, via a new and simple technical approach. To be specific, waste plastics are decomposed and reformed into naphtha fractions via a one-step catalytic pyrolysis over Al2O3 pillared montmorillonite clay catalyst. Experimental results show that Al2O3 pillared montmorillonite clay produces up to 60.3% C-5-C-12 alkanes, while ZSM-5 gives high contents of aromatics (46%) and olefins (35%). The promising results of Al2O3 pillared M-clay may be due to the special features of this material, including the large pore size and Al2O3-induced active sites (more Bronsted acid sites). The further batch experiments confirm the feasibility of scaling up and processing the polyolefinic plastic mixture. (C) 2021 Elsevier B.V. All rights reserved.
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