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Effects of Vitrinite in Low-Rank Coal on the Structure and Combustion Reactivity of Pyrolysis Chars

[Image: see text] Pyrolysis is a highly promising technology for the efficient utilization of low-rank coal. The structure of coal plays an important role in its utilization. In this paper, the evolution of the char structure during heat treatment (200–800 °C) of Naomaohu coal and its different vitr...

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Autores principales: Xu, Yanmei, Fu, Qingyun, Hong, Yingmin, Zhang, Ying, Wang, Liang, Bei, Ke, Chou, I-Ming, Hu, Haoquan, Pan, Zhiyan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2020
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7377080/
https://www.ncbi.nlm.nih.gov/pubmed/32715216
http://dx.doi.org/10.1021/acsomega.0c01542
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author Xu, Yanmei
Fu, Qingyun
Hong, Yingmin
Zhang, Ying
Wang, Liang
Bei, Ke
Chou, I-Ming
Hu, Haoquan
Pan, Zhiyan
author_facet Xu, Yanmei
Fu, Qingyun
Hong, Yingmin
Zhang, Ying
Wang, Liang
Bei, Ke
Chou, I-Ming
Hu, Haoquan
Pan, Zhiyan
author_sort Xu, Yanmei
collection PubMed
description [Image: see text] Pyrolysis is a highly promising technology for the efficient utilization of low-rank coal. The structure of coal plays an important role in its utilization. In this paper, the evolution of the char structure during heat treatment (200–800 °C) of Naomaohu coal and its different vitrinite-rich fractions was studied. The functional group structure, aromatic ring structure, and crystallite size of chars were determined by Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, and X-ray diffraction (XRD) spectroscopy, respectively. The results indicated that minerals inhibit the condensation reaction of aromatic rings during pyrolysis. The high vitrinite content in coal is conducive to the formation of larger char crystallite average sizes (L(a)). The relationship between L(a) (1.69–3.10 nm) and the Raman band area ratio A((G(R)+V(L)+V(R)))/A(D) or A(D)/A(all) was established. In addition, the combustion performance and kinetics of chars were also investigated. The results showed that the char from high contents of the liptinite fraction has lower combustion reactivity, and demineralization treatment has significantly reduced the combustion reactivity of char.
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spelling pubmed-73770802020-07-24 Effects of Vitrinite in Low-Rank Coal on the Structure and Combustion Reactivity of Pyrolysis Chars Xu, Yanmei Fu, Qingyun Hong, Yingmin Zhang, Ying Wang, Liang Bei, Ke Chou, I-Ming Hu, Haoquan Pan, Zhiyan ACS Omega [Image: see text] Pyrolysis is a highly promising technology for the efficient utilization of low-rank coal. The structure of coal plays an important role in its utilization. In this paper, the evolution of the char structure during heat treatment (200–800 °C) of Naomaohu coal and its different vitrinite-rich fractions was studied. The functional group structure, aromatic ring structure, and crystallite size of chars were determined by Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, and X-ray diffraction (XRD) spectroscopy, respectively. The results indicated that minerals inhibit the condensation reaction of aromatic rings during pyrolysis. The high vitrinite content in coal is conducive to the formation of larger char crystallite average sizes (L(a)). The relationship between L(a) (1.69–3.10 nm) and the Raman band area ratio A((G(R)+V(L)+V(R)))/A(D) or A(D)/A(all) was established. In addition, the combustion performance and kinetics of chars were also investigated. The results showed that the char from high contents of the liptinite fraction has lower combustion reactivity, and demineralization treatment has significantly reduced the combustion reactivity of char. American Chemical Society 2020-07-08 /pmc/articles/PMC7377080/ /pubmed/32715216 http://dx.doi.org/10.1021/acsomega.0c01542 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 Xu, Yanmei
Fu, Qingyun
Hong, Yingmin
Zhang, Ying
Wang, Liang
Bei, Ke
Chou, I-Ming
Hu, Haoquan
Pan, Zhiyan
Effects of Vitrinite in Low-Rank Coal on the Structure and Combustion Reactivity of Pyrolysis Chars
title Effects of Vitrinite in Low-Rank Coal on the Structure and Combustion Reactivity of Pyrolysis Chars
title_full Effects of Vitrinite in Low-Rank Coal on the Structure and Combustion Reactivity of Pyrolysis Chars
title_fullStr Effects of Vitrinite in Low-Rank Coal on the Structure and Combustion Reactivity of Pyrolysis Chars
title_full_unstemmed Effects of Vitrinite in Low-Rank Coal on the Structure and Combustion Reactivity of Pyrolysis Chars
title_short Effects of Vitrinite in Low-Rank Coal on the Structure and Combustion Reactivity of Pyrolysis Chars
title_sort effects of vitrinite in low-rank coal on the structure and combustion reactivity of pyrolysis chars
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7377080/
https://www.ncbi.nlm.nih.gov/pubmed/32715216
http://dx.doi.org/10.1021/acsomega.0c01542
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