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Influence Mechanism of Water-Soluble Sodium on Zhundong Coal Pyrolysis

[Image: see text] An inherent water-soluble sodium-loaded coal sample was prepared using crown ether for this study. The pyrolysis process of an inherent water-soluble sodium-loaded coal sample and a water-soluble sodium compound-loaded coal sample was researched by thermogravimetric analysis (TGA)....

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Autores principales: Zhang, Zhiyuan, Zhou, Hengtao, Wang, Xutao, Zhang, Lilin, Rao, Peijun, Zhu, Huanguang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9016871/
https://www.ncbi.nlm.nih.gov/pubmed/35449928
http://dx.doi.org/10.1021/acsomega.1c07311
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author Zhang, Zhiyuan
Zhou, Hengtao
Wang, Xutao
Zhang, Lilin
Rao, Peijun
Zhu, Huanguang
author_facet Zhang, Zhiyuan
Zhou, Hengtao
Wang, Xutao
Zhang, Lilin
Rao, Peijun
Zhu, Huanguang
author_sort Zhang, Zhiyuan
collection PubMed
description [Image: see text] An inherent water-soluble sodium-loaded coal sample was prepared using crown ether for this study. The pyrolysis process of an inherent water-soluble sodium-loaded coal sample and a water-soluble sodium compound-loaded coal sample was researched by thermogravimetric analysis (TGA). Also, the pyrolysis kinetics of the coal samples were analyzed and researched by the distributed activation energy model (DAEM). The results show that the inherent water-soluble sodium is mainly concentrated on coal particles, which further aggravates the degree of the pyrolysis reaction. The presence of sodium can promote the weight loss of coal samples in the preliminary stage of pyrolysis and the thermal condensation stage, block the escape of volatile matter during the main pyrolysis period, and inhibit the process of graphitization of char. The activation energy of pyrolysis increases with the carbon conversion rate, and the presence of sodium can reduce the activation energy under the same carbon conversion rate.
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spelling pubmed-90168712022-04-20 Influence Mechanism of Water-Soluble Sodium on Zhundong Coal Pyrolysis Zhang, Zhiyuan Zhou, Hengtao Wang, Xutao Zhang, Lilin Rao, Peijun Zhu, Huanguang ACS Omega [Image: see text] An inherent water-soluble sodium-loaded coal sample was prepared using crown ether for this study. The pyrolysis process of an inherent water-soluble sodium-loaded coal sample and a water-soluble sodium compound-loaded coal sample was researched by thermogravimetric analysis (TGA). Also, the pyrolysis kinetics of the coal samples were analyzed and researched by the distributed activation energy model (DAEM). The results show that the inherent water-soluble sodium is mainly concentrated on coal particles, which further aggravates the degree of the pyrolysis reaction. The presence of sodium can promote the weight loss of coal samples in the preliminary stage of pyrolysis and the thermal condensation stage, block the escape of volatile matter during the main pyrolysis period, and inhibit the process of graphitization of char. The activation energy of pyrolysis increases with the carbon conversion rate, and the presence of sodium can reduce the activation energy under the same carbon conversion rate. American Chemical Society 2022-03-31 /pmc/articles/PMC9016871/ /pubmed/35449928 http://dx.doi.org/10.1021/acsomega.1c07311 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Zhang, Zhiyuan
Zhou, Hengtao
Wang, Xutao
Zhang, Lilin
Rao, Peijun
Zhu, Huanguang
Influence Mechanism of Water-Soluble Sodium on Zhundong Coal Pyrolysis
title Influence Mechanism of Water-Soluble Sodium on Zhundong Coal Pyrolysis
title_full Influence Mechanism of Water-Soluble Sodium on Zhundong Coal Pyrolysis
title_fullStr Influence Mechanism of Water-Soluble Sodium on Zhundong Coal Pyrolysis
title_full_unstemmed Influence Mechanism of Water-Soluble Sodium on Zhundong Coal Pyrolysis
title_short Influence Mechanism of Water-Soluble Sodium on Zhundong Coal Pyrolysis
title_sort influence mechanism of water-soluble sodium on zhundong coal pyrolysis
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9016871/
https://www.ncbi.nlm.nih.gov/pubmed/35449928
http://dx.doi.org/10.1021/acsomega.1c07311
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