The Effect of Silicon-Containing Minerals on Coal Evolution at High-Temperature Pre-Graphitization Stage

Coal is a carrier of carbon enrichment, so it has the potential for the preparation of coal-based carbon materials. In this paper, LT anthracite and TSG bituminous coal were selected, and the corresponding graphitized samples were prepared from high-temperature treatment. The effects of silicon-cont...
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Autor*in:	Yan Shao [verfasserIn] Shaoqing Wang [verfasserIn] Xueqi Li [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2022

Schlagwörter:	coal silicon-containing minerals pre-graphitization stage structural evolution micromorphology

Übergeordnetes Werk:	In: Minerals - MDPI AG, 2012, 13(2022), 1, p 20
Übergeordnetes Werk:	volume:13 ; year:2022 ; number:1, p 20

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.3390/min13010020

Katalog-ID:	DOAJ081738080

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520			\|a Coal is a carrier of carbon enrichment, so it has the potential for the preparation of coal-based carbon materials. In this paper, LT anthracite and TSG bituminous coal were selected, and the corresponding graphitized samples were prepared from high-temperature treatment. The effects of silicon-containing minerals on coal evolution during the high-temperature pre-graphitization stage were investigated by XRD, Raman spectroscopy, and SEM. The results showed that with increasing temperature, the silicon-containing samples showed smaller d<sub<002</sub< and ID<sub<1</sub</IG, and higher L<sub<c</sub<, while L<sub<a</sub< presented a slight increase. It was found by SEM that the micromorphology of all samples was mainly massive structures. Meanwhile, irregular polyhedral structures also were observed in silicon-containing samples at 1300 °C, which were related to the formation and deposition of SiC. The carbothermal reactions of silicon-containing minerals continued to generate SiC and precipitate with increasing temperature, resulting in the gradual transformation of the needle-like structures into polyhedral structures. However, SiC was completely decomposed at 2800 °C. These changes indicated that during the pre-graphitization stage, silicon-containing minerals form SiC to advance the reduction of the interlayer spacing and the increase of longitudinal layer stacking height, thereby enhancing structural ordering and graphitization degree, while it had less effect on the lateral size. This will help to further understand the role of silicon-containing minerals in the coal pre-graphitization stage and also provide useful information about synthetic coal-based graphite.
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language	English
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authorswithroles_txt_mv	Yan Shao @@aut@@ Shaoqing Wang @@aut@@ Xueqi Li @@aut@@
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callnumber-first	Q - Science
author	Yan Shao
spellingShingle	Yan Shao misc QE351-399.2 misc coal misc silicon-containing minerals misc pre-graphitization stage misc structural evolution misc micromorphology misc Mineralogy The Effect of Silicon-Containing Minerals on Coal Evolution at High-Temperature Pre-Graphitization Stage
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topic_title	QE351-399.2 The Effect of Silicon-Containing Minerals on Coal Evolution at High-Temperature Pre-Graphitization Stage coal silicon-containing minerals pre-graphitization stage structural evolution micromorphology
topic	misc QE351-399.2 misc coal misc silicon-containing minerals misc pre-graphitization stage misc structural evolution misc micromorphology misc Mineralogy
topic_unstemmed	misc QE351-399.2 misc coal misc silicon-containing minerals misc pre-graphitization stage misc structural evolution misc micromorphology misc Mineralogy
topic_browse	misc QE351-399.2 misc coal misc silicon-containing minerals misc pre-graphitization stage misc structural evolution misc micromorphology misc Mineralogy
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title	The Effect of Silicon-Containing Minerals on Coal Evolution at High-Temperature Pre-Graphitization Stage
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title_full	The Effect of Silicon-Containing Minerals on Coal Evolution at High-Temperature Pre-Graphitization Stage
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title_sort	effect of silicon-containing minerals on coal evolution at high-temperature pre-graphitization stage
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title_auth	The Effect of Silicon-Containing Minerals on Coal Evolution at High-Temperature Pre-Graphitization Stage
abstract	Coal is a carrier of carbon enrichment, so it has the potential for the preparation of coal-based carbon materials. In this paper, LT anthracite and TSG bituminous coal were selected, and the corresponding graphitized samples were prepared from high-temperature treatment. The effects of silicon-containing minerals on coal evolution during the high-temperature pre-graphitization stage were investigated by XRD, Raman spectroscopy, and SEM. The results showed that with increasing temperature, the silicon-containing samples showed smaller d<sub<002</sub< and ID<sub<1</sub</IG, and higher L<sub<c</sub<, while L<sub<a</sub< presented a slight increase. It was found by SEM that the micromorphology of all samples was mainly massive structures. Meanwhile, irregular polyhedral structures also were observed in silicon-containing samples at 1300 °C, which were related to the formation and deposition of SiC. The carbothermal reactions of silicon-containing minerals continued to generate SiC and precipitate with increasing temperature, resulting in the gradual transformation of the needle-like structures into polyhedral structures. However, SiC was completely decomposed at 2800 °C. These changes indicated that during the pre-graphitization stage, silicon-containing minerals form SiC to advance the reduction of the interlayer spacing and the increase of longitudinal layer stacking height, thereby enhancing structural ordering and graphitization degree, while it had less effect on the lateral size. This will help to further understand the role of silicon-containing minerals in the coal pre-graphitization stage and also provide useful information about synthetic coal-based graphite.
abstractGer	Coal is a carrier of carbon enrichment, so it has the potential for the preparation of coal-based carbon materials. In this paper, LT anthracite and TSG bituminous coal were selected, and the corresponding graphitized samples were prepared from high-temperature treatment. The effects of silicon-containing minerals on coal evolution during the high-temperature pre-graphitization stage were investigated by XRD, Raman spectroscopy, and SEM. The results showed that with increasing temperature, the silicon-containing samples showed smaller d<sub<002</sub< and ID<sub<1</sub</IG, and higher L<sub<c</sub<, while L<sub<a</sub< presented a slight increase. It was found by SEM that the micromorphology of all samples was mainly massive structures. Meanwhile, irregular polyhedral structures also were observed in silicon-containing samples at 1300 °C, which were related to the formation and deposition of SiC. The carbothermal reactions of silicon-containing minerals continued to generate SiC and precipitate with increasing temperature, resulting in the gradual transformation of the needle-like structures into polyhedral structures. However, SiC was completely decomposed at 2800 °C. These changes indicated that during the pre-graphitization stage, silicon-containing minerals form SiC to advance the reduction of the interlayer spacing and the increase of longitudinal layer stacking height, thereby enhancing structural ordering and graphitization degree, while it had less effect on the lateral size. This will help to further understand the role of silicon-containing minerals in the coal pre-graphitization stage and also provide useful information about synthetic coal-based graphite.
abstract_unstemmed	Coal is a carrier of carbon enrichment, so it has the potential for the preparation of coal-based carbon materials. In this paper, LT anthracite and TSG bituminous coal were selected, and the corresponding graphitized samples were prepared from high-temperature treatment. The effects of silicon-containing minerals on coal evolution during the high-temperature pre-graphitization stage were investigated by XRD, Raman spectroscopy, and SEM. The results showed that with increasing temperature, the silicon-containing samples showed smaller d<sub<002</sub< and ID<sub<1</sub</IG, and higher L<sub<c</sub<, while L<sub<a</sub< presented a slight increase. It was found by SEM that the micromorphology of all samples was mainly massive structures. Meanwhile, irregular polyhedral structures also were observed in silicon-containing samples at 1300 °C, which were related to the formation and deposition of SiC. The carbothermal reactions of silicon-containing minerals continued to generate SiC and precipitate with increasing temperature, resulting in the gradual transformation of the needle-like structures into polyhedral structures. However, SiC was completely decomposed at 2800 °C. These changes indicated that during the pre-graphitization stage, silicon-containing minerals form SiC to advance the reduction of the interlayer spacing and the increase of longitudinal layer stacking height, thereby enhancing structural ordering and graphitization degree, while it had less effect on the lateral size. This will help to further understand the role of silicon-containing minerals in the coal pre-graphitization stage and also provide useful information about synthetic coal-based graphite.
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title_short	The Effect of Silicon-Containing Minerals on Coal Evolution at High-Temperature Pre-Graphitization Stage
url	https://doi.org/10.3390/min13010020 https://doaj.org/article/9b1f5bb14327404cb7febc1ebb7ec3ef https://www.mdpi.com/2075-163X/13/1/20 https://doaj.org/toc/2075-163X
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The Effect of Silicon-Containing Minerals on Coal Evolution at High-Temperature Pre-Graphitization Stage

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