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Study on correlations of coal chemical properties based on database of real-time data

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  • Wang, Chang'an
  • Wu, Song
  • Lv, Qiang
  • Liu, Xuan
  • Chen, Wufeng
  • Che, Defu

Abstract

The chemical properties of coal have conspicuous impacts on reactivity and thermal conversion of coal. Nevertheless, the quantitative investigation on correlations of coal chemical properties is still insufficient. The quantified correlations between fuel ratio and various indices of coal chemical property is yet lacking, and little research was conducted to quantitatively describe the proximate and ultimate analyses using ternary diagrams. Here, we investigated the correlations of coal chemical properties based on database of real-time (experimental or actual) data in China. Some noteworthy variations and quantified correlations among chemical properties of coal were firstly demonstrated. The majority of coals (∼87%) lie within a range defined by the fuel ratio of 1.0–10.0. Ternary correlations of ultimate and proximate analyses show different distributions with coal rank. The index of coal explosibility is slightly lowered with the increasing carbon content, while the increase of oxygen content leads to certain rise of coal explosibility. In addition, the majority of low-fusion coals have high levels of volatile matter. The occurrence and content of minerals both present considerable influences on ash fusion behaviors. The present study can provide useful information for better understanding the correlations between chemical properties and reactivities of coal.

Suggested Citation

  • Wang, Chang'an & Wu, Song & Lv, Qiang & Liu, Xuan & Chen, Wufeng & Che, Defu, 2017. "Study on correlations of coal chemical properties based on database of real-time data," Applied Energy, Elsevier, vol. 204(C), pages 1115-1123.
    • Handle: RePEc:eee:appene:v:204:y:2017:i:c:p:1115-1123
    DOI: 10.1016/j.apenergy.2017.03.049
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    4. Zhao, Jingyu & Deng, Jun & Chen, Long & Wang, Tao & Song, Jiajia & Zhang, Yanni & Shu, Chi-Min & Zeng, Qiang, 2019. "Correlation analysis of the functional groups and exothermic characteristics of bituminous coal molecules during high-temperature oxidation," Energy, Elsevier, vol. 181(C), pages 136-147.
    5. Honghua Song & Yixin Zhao & Yaodong Jiang & Weisheng Du, 2020. "Experimental Investigation on the Tensile Strength of Coal: Consideration of the Specimen Size and Water Content," Energies, MDPI, vol. 13(24), pages 1-18, December.
    6. Wang, Pengqian & Wang, Chang'an & Yuan, Maobo & Wang, Chaowei & Zhang, Jinping & Du, Yongbo & Tao, Zichen & Che, Defu, 2020. "Experimental evaluation on co-combustion characteristics of semi-coke and coal under enhanced high-temperature and strong-reducing atmosphere," Applied Energy, Elsevier, vol. 260(C).
    7. Xu, Jun & Tang, Hao & Su, Sheng & Liu, Jiawei & Xu, Kai & Qian, Kun & Wang, Yi & Zhou, Yingbiao & Hu, Song & Zhang, Anchao & Xiang, Jun, 2018. "A study of the relationships between coal structures and combustion characteristics: The insights from micro-Raman spectroscopy based on 32 kinds of Chinese coals," Applied Energy, Elsevier, vol. 212(C), pages 46-56.

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