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Recycling of post-use starch-based plastic bags through pyrolysis to produce sulfonated catalysts and chemicals.
- Source :
-
Journal of Analytical & Applied Pyrolysis . May2021, Vol. 155, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
-
Abstract
- [Display omitted] • Pyrolysis and sulfonation convert starch-based plastic (SBP) bags into SO 3 H-catalyst. • SO 3 H-catalyst from SBP-bags well-catalyzes the esterification of fatty acids. • SO 3 H-catalyst from SBP-bags is robust and recyclable for more than 7 cycles. • Highly pure terephthalic acid self-precipitates from SBP-bags pyrolysis liquid. • Pyrolysis liquid is enriched in levoglucosan, adipic acid and monobutenyl esters. Pyrolysis was explored as a technology for depolymerizing and charring starch-based plastic bags in a novel valorization perspective based on a chemical recycling strategy, alternative to anaerobic digestion or composting. The char obtained from the thermal treatment (420°C for 15 h) was sulfonated to give a highly active and recyclable heterogeneous acid catalyst (10 wt% yield based on starch-based plastic bags subjected to pyrolysis), comparable in terms of catalytic activity and reusability to the analog catalyst prepared from potato starch and tested on a model esterification reaction. From pyrolysis liquid of starch-based plastic bags, highly pure terephthalic acid (4 wt% yield) was isolated through self-precipitation, whereas the remaining pyrolysis liquid produced (21 wt%) was solvent-fractionated to give a polar fraction (7 wt% yield) enriched in levoglucosan, and a less polar fraction (14 wt% yield) enriched in monobutenyl adipate and terephthalate. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01652370
- Volume :
- 155
- Database :
- Academic Search Index
- Journal :
- Journal of Analytical & Applied Pyrolysis
- Publication Type :
- Academic Journal
- Accession number :
- 149838124
- Full Text :
- https://doi.org/10.1016/j.jaap.2021.105030