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Study of Combustion Characteristics and Matching Between the Blends of Gasification Fine Slag and Coal with Varied Ranks

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Abstract

Gasification fine slag (GS) is a kind of solid waste produced in the process of coal gasification. Due to its high annual production and large accumulation, it is potentially harmful to air quality and groundwater, and has certain impact on human health, so resource utilization of coal gasification slag is an urgent problem at present. Combustion is considered as a cost-effective way for GS utilization. In this paper, the combustion characteristics and fuel matching of GS mixed with different coalification degree coal (lignite, bituminous coal, anthracite) were studied. The combustion of three kinds of mixed fuels was analyzed by thermogravimetric data, conventional combustion characteristic parameters, activation energy and statistical principal component analysis (PCA). The kinetic analysis shows that the co-combustion with coal effectively reduces the activation energy of GS, and the activation energy increases with the increase of coalification degree. The results of PCA analysis show that with the increase of coalification degree, the matching of mixed fuel is improved, and the low rank coal is mainly affected by the addition ratio, while the influence of the heating rate of high rank coal is more significant. The results of this study can provide some guidance for the co-combustion of GS.

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Data Availability

Enquiries about data availability should be directed to the authors.

Abbreviations

GS:

Gasification fine slag

L:

Lignite

B:

Bituminous coal

A:

Anthracite

PCA:

Principal component analysis

TG:

Thermogravimetric analysis

DTG:

The value of differential thermogravimetric

Ti :

The ignition temperature

Tb :

The burnout temperature

Tp :

The peak point on the DTG curve

S:

The comprehensive combustion characteristic index

E:

Activation energy

R:

Gas constant

T:

Absolute temperature

Ci :

The ignition index

Cb :

The burnout index

− Rp :

Maximum mass loss rate

− Rv :

Average mass loss rate

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Funding

This work was supported by the National Natural Science Foundation of China (51974311), the National Key Research and Development Program of China (2019YFC1904302), science and technology small and medium-sized enterprise innovation ability promotion project of Shandong province (2021TSGC1372), science and technology development plan project of Heze (2021LSDT01).

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Authors and Affiliations

  1. National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China

    Yan Li, Yixin Zhang, Wenke Jia, Yang Guo, Hongguan Wang, Sixi Guo, Manman Xue, Fanhui Guo & Jianjun Wu

  2. School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China

    Yan Li, Yixin Zhang, Wenke Jia, Yang Guo, Hongguan Wang, Sixi Guo, Manman Xue, Fanhui Guo & Jianjun Wu

  3. Shandong Engineering Research Center of Chemical Intermediate, Jining University, Qufu, 273155, China

    Chongdian Si

Authors
  1. Yan Li
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  2. Yixin Zhang
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  3. Wenke Jia
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  4. Yang Guo
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Contributions

Yan Li: Conceptualization, Methodology, Writing original draft. Yixin Zhang: Conceptualization, Methodology. Wenke Jia: Validation, Writing-review and editing. Yang Guo: Resources, Writing review and editing. Hongguan Wang: Validation Writing-review and editing. Sixi Guo: Data curation, Writing review and editing. Manman Xue: Data curation. Fanhui Guo: Methodology. Jianjun Wu: Project administration. Supervision, Funding. Chongdian Si: Supervision, Funding.

Corresponding authors

Correspondence to Yixin Zhang or Jianjun Wu.

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Li, Y., Zhang, Y., Jia, W. et al. Study of Combustion Characteristics and Matching Between the Blends of Gasification Fine Slag and Coal with Varied Ranks. Waste Biomass Valor (2024). https://doi.org/10.1007/s12649-024-02439-x

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