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Roles of Ion-Exchangeable Sodium in the Conversion Process of Tar to Soot during Rapid Pyrolysis of Two Brown Coals in a Drop-Tube Reactor

[Image: see text] In this work, two series of brown coals (including acid-washed coal and ion-exchangeable Na-loaded coal) were pyrolyzed in a drop-tube reactor. The experimental results revealed that soot and tar yields of Na-loaded coals were significantly lower than that of acid-washed coals. Gas...

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Autores principales: Dong, Heming, Zhang, Yu, Du, Qian, Li, Dun, Feng, Dongdong, Gao, Jianmin, Wu, Shaohua, Luan, Jiyi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2020
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7191602/
https://www.ncbi.nlm.nih.gov/pubmed/32363260
http://dx.doi.org/10.1021/acsomega.9b03441
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author Dong, Heming
Zhang, Yu
Du, Qian
Li, Dun
Feng, Dongdong
Gao, Jianmin
Wu, Shaohua
Luan, Jiyi
author_facet Dong, Heming
Zhang, Yu
Du, Qian
Li, Dun
Feng, Dongdong
Gao, Jianmin
Wu, Shaohua
Luan, Jiyi
author_sort Dong, Heming
collection PubMed
description [Image: see text] In this work, two series of brown coals (including acid-washed coal and ion-exchangeable Na-loaded coal) were pyrolyzed in a drop-tube reactor. The experimental results revealed that soot and tar yields of Na-loaded coals were significantly lower than that of acid-washed coals. Gasified Na can reduce the formation of big soot agglomerates. During coal primary pyrolysis, ion-exchangeable Na can reduce the amount and aromaticity of primary tar. Na released with volatiles can catalyze the cracking of aliphatic and aromatic compounds, inhibit the polymerization between aromatic rings, and promote the combination of soot/tar with oxygen-containing substances, resulting in the decrease of graphite crystallite size and the increase of amorphous carbon content. Na can also reduce the organization degree of soot by forming intercalation compounds.
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spelling pubmed-71916022020-05-01 Roles of Ion-Exchangeable Sodium in the Conversion Process of Tar to Soot during Rapid Pyrolysis of Two Brown Coals in a Drop-Tube Reactor Dong, Heming Zhang, Yu Du, Qian Li, Dun Feng, Dongdong Gao, Jianmin Wu, Shaohua Luan, Jiyi ACS Omega [Image: see text] In this work, two series of brown coals (including acid-washed coal and ion-exchangeable Na-loaded coal) were pyrolyzed in a drop-tube reactor. The experimental results revealed that soot and tar yields of Na-loaded coals were significantly lower than that of acid-washed coals. Gasified Na can reduce the formation of big soot agglomerates. During coal primary pyrolysis, ion-exchangeable Na can reduce the amount and aromaticity of primary tar. Na released with volatiles can catalyze the cracking of aliphatic and aromatic compounds, inhibit the polymerization between aromatic rings, and promote the combination of soot/tar with oxygen-containing substances, resulting in the decrease of graphite crystallite size and the increase of amorphous carbon content. Na can also reduce the organization degree of soot by forming intercalation compounds. American Chemical Society 2020-04-17 /pmc/articles/PMC7191602/ /pubmed/32363260 http://dx.doi.org/10.1021/acsomega.9b03441 Text en Copyright © 2020 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Dong, Heming
Zhang, Yu
Du, Qian
Li, Dun
Feng, Dongdong
Gao, Jianmin
Wu, Shaohua
Luan, Jiyi
Roles of Ion-Exchangeable Sodium in the Conversion Process of Tar to Soot during Rapid Pyrolysis of Two Brown Coals in a Drop-Tube Reactor
title Roles of Ion-Exchangeable Sodium in the Conversion Process of Tar to Soot during Rapid Pyrolysis of Two Brown Coals in a Drop-Tube Reactor
title_full Roles of Ion-Exchangeable Sodium in the Conversion Process of Tar to Soot during Rapid Pyrolysis of Two Brown Coals in a Drop-Tube Reactor
title_fullStr Roles of Ion-Exchangeable Sodium in the Conversion Process of Tar to Soot during Rapid Pyrolysis of Two Brown Coals in a Drop-Tube Reactor
title_full_unstemmed Roles of Ion-Exchangeable Sodium in the Conversion Process of Tar to Soot during Rapid Pyrolysis of Two Brown Coals in a Drop-Tube Reactor
title_short Roles of Ion-Exchangeable Sodium in the Conversion Process of Tar to Soot during Rapid Pyrolysis of Two Brown Coals in a Drop-Tube Reactor
title_sort roles of ion-exchangeable sodium in the conversion process of tar to soot during rapid pyrolysis of two brown coals in a drop-tube reactor
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7191602/
https://www.ncbi.nlm.nih.gov/pubmed/32363260
http://dx.doi.org/10.1021/acsomega.9b03441
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