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Recycling of post-use starch-based plastic bags through pyrolysis to produce sulfonated catalysts and chemicals
- Source :
- Journal of Analytical and Applied Pyrolysis. 155:105030
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- 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.
- Subjects :
- Terephthalic acid
Chemistry
Starch
020209 energy
Levoglucosan
Pyrolysi
02 engineering and technology
Analytical Chemistry
chemistry.chemical_compound
Chemical recycling
Heterogeneous acid catalyst
Fuel Technology
020401 chemical engineering
Yield (chemistry)
0202 electrical engineering, electronic engineering, information engineering
Char
Building block
Starch-based plastic bags
0204 chemical engineering
Potato starch
Pyrolysis
Nuclear chemistry
Plastic bag
Subjects
Details
- ISSN :
- 01652370
- Volume :
- 155
- Database :
- OpenAIRE
- Journal :
- Journal of Analytical and Applied Pyrolysis
- Accession number :
- edsair.doi.dedup.....fd84f5e413d0498f5ebde48c97931d5a