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Aspects of chemical recycling of complex plastic waste via the gasification route.

Authors :
Weiland F
Lundin L
Celebi M
van der Vlist K
Moradian F
Source :
Waste management (New York, N.Y.) [Waste Manag] 2021 May 01; Vol. 126, pp. 65-77. Date of Electronic Publication: 2021 Mar 17.
Publication Year :
2021

Abstract

Oxygen blown high-temperature gasification constitutes an opportunity for chemical recycling of plastic wastes. This article summarizes the results from comparative tests of combustion and gasification of two complex plastic wastes: a plastic reject (PR) from processing recycled paper and an automotive shredder residue (ASR). Calculated gasification efficiencies corresponded to about 80% and 60%, respectively. Gasification resulted in lower yields of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/F) compared to direct combustion. A two-stage process, including gasification followed by syngas combustion, reduced the emissions of HCl and PCDD/F in the flue gas to <1.4% and <0.2%, respectively, compared to the levels from direct combustion of the PR feedstock. Most of the PCDD/F (>99%) was captured along with particulate matter (soot) during gasification. The contribution to the toxic concentration of PCDD/F was mainly from the PCDF congeners. Fly ash particulate matter from ASR combustion contained a significant proportion of zinc, which thus constitutes a great potential for use in zinc recycling.<br />Competing Interests: 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.<br /> (Copyright © 2021 Elsevier Ltd. All rights reserved.)

Details

Language :
English
ISSN :
1879-2456
Volume :
126
Database :
MEDLINE
Journal :
Waste management (New York, N.Y.)
Publication Type :
Academic Journal
Accession number :
33740713
Full Text :
https://doi.org/10.1016/j.wasman.2021.02.054