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Pyrolysis for Nylon 6 Monomer Recovery from Teabag Waste

In this work, we used pyrolysis to treat teabag waste (TBW). Changes in the pyrolysis temperature affected the composition and yield of the products. For example, more non-condensable gases and less char were produced with an increase in the pyrolysis temperature. Pyrolysis conducted under a nitroge...

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Autores principales: Kim, Soosan, Lee, Nahyeon, Lee, Jechan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7697768/
https://www.ncbi.nlm.nih.gov/pubmed/33207591
http://dx.doi.org/10.3390/polym12112695
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author Kim, Soosan
Lee, Nahyeon
Lee, Jechan
author_facet Kim, Soosan
Lee, Nahyeon
Lee, Jechan
author_sort Kim, Soosan
collection PubMed
description In this work, we used pyrolysis to treat teabag waste (TBW). Changes in the pyrolysis temperature affected the composition and yield of the products. For example, more non-condensable gases and less char were produced with an increase in the pyrolysis temperature. Pyrolysis conducted under a nitrogen environment yielded caprolactam at temperatures between 400 and 700 °C. An increase in the pyrolysis temperature from 400 to 500 °C increased the caprolactam yield from 3.1 to 6.2 wt.%. At 700 °C, the yield decreased to 4.6 wt.%. The highest caprolactam yield (i.e., 6.2 wt.% at 500 °C) was equivalent to 59.2 wt.% on the basis of the weight of the non-biomass part of the TBW. The pyrolytic products other than caprolactam (e.g., combustible gases, pyrolytic liquid, and char) can function as fuels to supply energy during pyrolysis in order to increase and maintain the temperature. The higher heating values (HHVs) of the combustible gases and pyrolytic liquid produced at 500 °C were 7.7 and 8.3 MJ kg(−1), respectively. The HHV of the char produced at 500 °C was 23 MJ kg(−1), which is comparable to the HHV of coal. This work will help to develop effective pyrolysis processes to valorize everyday waste by recovering value-added chemicals such as polymer monomers and by producing alternative fuels.
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spelling pubmed-76977682020-11-29 Pyrolysis for Nylon 6 Monomer Recovery from Teabag Waste Kim, Soosan Lee, Nahyeon Lee, Jechan Polymers (Basel) Article In this work, we used pyrolysis to treat teabag waste (TBW). Changes in the pyrolysis temperature affected the composition and yield of the products. For example, more non-condensable gases and less char were produced with an increase in the pyrolysis temperature. Pyrolysis conducted under a nitrogen environment yielded caprolactam at temperatures between 400 and 700 °C. An increase in the pyrolysis temperature from 400 to 500 °C increased the caprolactam yield from 3.1 to 6.2 wt.%. At 700 °C, the yield decreased to 4.6 wt.%. The highest caprolactam yield (i.e., 6.2 wt.% at 500 °C) was equivalent to 59.2 wt.% on the basis of the weight of the non-biomass part of the TBW. The pyrolytic products other than caprolactam (e.g., combustible gases, pyrolytic liquid, and char) can function as fuels to supply energy during pyrolysis in order to increase and maintain the temperature. The higher heating values (HHVs) of the combustible gases and pyrolytic liquid produced at 500 °C were 7.7 and 8.3 MJ kg(−1), respectively. The HHV of the char produced at 500 °C was 23 MJ kg(−1), which is comparable to the HHV of coal. This work will help to develop effective pyrolysis processes to valorize everyday waste by recovering value-added chemicals such as polymer monomers and by producing alternative fuels. MDPI 2020-11-16 /pmc/articles/PMC7697768/ /pubmed/33207591 http://dx.doi.org/10.3390/polym12112695 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Kim, Soosan
Lee, Nahyeon
Lee, Jechan
Pyrolysis for Nylon 6 Monomer Recovery from Teabag Waste
title Pyrolysis for Nylon 6 Monomer Recovery from Teabag Waste
title_full Pyrolysis for Nylon 6 Monomer Recovery from Teabag Waste
title_fullStr Pyrolysis for Nylon 6 Monomer Recovery from Teabag Waste
title_full_unstemmed Pyrolysis for Nylon 6 Monomer Recovery from Teabag Waste
title_short Pyrolysis for Nylon 6 Monomer Recovery from Teabag Waste
title_sort pyrolysis for nylon 6 monomer recovery from teabag waste
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7697768/
https://www.ncbi.nlm.nih.gov/pubmed/33207591
http://dx.doi.org/10.3390/polym12112695
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