| Autor: |
CHEN Gaojian, CAO Daiyong, WANG Anmin, WEI Yingchun, LIU Zhifei, ZHAO Meng |
| Jazyk: |
English<br />Chinese |
| Rok vydání: |
2024 |
| Předmět: |
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| Zdroj: |
矿业科学学报, Vol 9, Iss 2, Pp 144-155 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2096-2193 |
| DOI: |
10.19606/j.cnki.jmst.2024.02.002 |
| Popis: |
This study investigates the effect of SiO2 minerals on coal graphitization under natural conditions through high-temperature and high-pressure simulation experiment to invert the coal-based graphite formation environment.We thoroughly mixed the SiO2 additive with the sorted vitrinite in coal (from the Gemudi mining area in Guizhou province[SW China]) and then carried out high-temperature and high-pressure simulation experiment with ranging from 600 ℃ to 1 200 ℃, 1.5 GPa to 2.0 GPa.The graphitization products of the samples were analyzed by X-ray diffraction, Raman spectroscopy, and high-resolution transmission electron microscopy (HRTEM) to investigate the influence of the SiO2 additive on the process of coal graphitization.Results show that in contrast to the graphitization-promoting ability exhibited in high-temperature environments, SiO2 demonstrates a hindering effect on graphitization in high-temperature and high-pressure environments, inhibiting the growth of coal graphitization.This finding provides an hypothesis for the lower graphitization of coal in areas with strong tectonics under natural conditions. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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