Effect of the Moisture Content of Coal Blends on Coke Structure and its Apparent Gasification Kinetics with CO&lt;sub&gt;2&lt;/sub&gt;

Wang, Ziming; Li, Kejiang; Zhang, Jianliang; Zhang, Xuehong; Gai-feng, Xue; Chen, Xitao; Sun, Minmin; Jiang, Chunhe

doi:10.2355/isijinternational.isijint-2020-009

Cited by 4 publications

(2 citation statements)

References 27 publications

(38 reference statements)

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“…Factors affecting the surface tension include the nature of the material, temperature, and surface contact with the material and other impurities . Temperature can affect surface tension due to changes in intermolecular van der Waals forces. − Therefore, the surface tension of the composite solution was tested at room temperature by using the suspension droplet method, and the trend of surface tension as a function of concentration is shown in Figure .…”

Section: Resultsmentioning

confidence: 99%

Study on Surface Activity of Inorganic Salts on [C₁₂MIm]Cl and Wetting Characteristics of Compound Modified Bituminous Coal

Zhang,

Ni,

Jiang

et al. 2024

Energy Fuels

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The technical problem of the difficult wetting of coal bed water injection urgently needs to be solved, and the wetting of surfactants on the coal body is mainly affected by the concentration. In recent years, research related to surface-active ionic liquids (SAILs) with long-chain alkyl groups has attracted much attention. Salt can enhance the wetting effect of surfactants, but there are few studies on the effect of inorganic salts on the surface activity of [C 12 MIm]Cl and the effect of compound wetting bituminous coal. In this paper, NaCl was selected to be complexed with [C 12 MIm]Cl, and the trends of key functional groups and surface activity changes during coal wetting were quantitatively characterized from a microscopic point of view by functional group and wetting characterization analysis. The results showed that under the treatment of 0.6 mol/L of NaCl + 10 mmol/L of the [C 12 MIm]Cl compound, the surface tension was reduced by 7 N m/m and the minimum contact angle by 15.5°. In the modified coal, the peak area of the �CH 2 group is reduced by 29%, the peak area of the −CH 3 group is increased by 24%, the peak area of the OH•••N group is reduced by 14%, and the wetting effect is enhanced. However, the high concentration of NaCl in the composite solution will weaken the wetting effect on bituminous coal. The research results provide theoretical support for coal seam composite wetting by water injection.

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Section: Resultsmentioning

confidence: 99%

Study on Surface Activity of Inorganic Salts on [C₁₂MIm]Cl and Wetting Characteristics of Compound Modified Bituminous Coal

Zhang,

Ni,

Jiang

et al. 2024

Energy Fuels

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“…Andriopoulos et al 28) evaluated the distribution of pore size in high-strength coke and showed that there were many pores with small diameters. Wang et al 29) suggested that excess water in the coal causes large pores between the particles during coking, resulting in an increase in the average diameter of the pores in the coke. Kubota et al 30) showed that the presence of coke with low circularity in the coke reduced the strength of the coke by optical microscopy of the polished surface of the coke.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Evaluation of Internal Structure of Coke Made by Blending Non-coking Coal Using X-ray Computed Tomography

Matsukawa,

Nakamura,

Igawa

et al. 2024

ISIJ Int.

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Image analysis was performed on the analytical objects constructed by X-ray computed tomography images of coke with anthracite as low swelling and softening-melting coal to evaluate the pore structure three-dimensionally. The sphericity of the pores was calculated based on the volume and surface area of the pores. Tracers were inserted into all anthracite particles to distinguish coke matrices derived from anthracite from those derived from coking coal. This is the first success in identifying coke matrices derived from coking coal and those derived from other carbon source. The sphericity of pores in the surrounding area of the coke matrix derived from anthracite and the area without coke matrix derived from anthracite was extracted from the analytical object. The surrounding area of the coke matrix derived from anthracite contained more low-sphericity pores compared to the area without coke matrix derived from anthracite. This may be due to the free expansion of the coking coal in the surrounding area of the anthracite since the anthracite does not soften or expand during carbonization. The coking coal expanded excessively to fill the voids between the particles, resulting in the bubbles bursting and generating connected pores.

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CFD-DEM study on the synergistic effect of coke consumption and particle dynamics in the blast furnace raceway

Xu,

Han,

et al. 2024

Particuology

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Effect of the Moisture Content of Coal Blends on Coke Structure and its Apparent Gasification Kinetics with CO<sub>2</sub>

Cited by 4 publications

References 27 publications

Study on Surface Activity of Inorganic Salts on [C₁₂MIm]Cl and Wetting Characteristics of Compound Modified Bituminous Coal

Study on Surface Activity of Inorganic Salts on [C₁₂MIm]Cl and Wetting Characteristics of Compound Modified Bituminous Coal

Three-Dimensional Evaluation of Internal Structure of Coke Made by Blending Non-coking Coal Using X-ray Computed Tomography

CFD-DEM study on the synergistic effect of coke consumption and particle dynamics in the blast furnace raceway

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Effect of the Moisture Content of Coal Blends on Coke Structure and its Apparent Gasification Kinetics with CO<sub>2</sub>

Cited by 4 publications

References 27 publications

Study on Surface Activity of Inorganic Salts on [C12MIm]Cl and Wetting Characteristics of Compound Modified Bituminous Coal

Study on Surface Activity of Inorganic Salts on [C12MIm]Cl and Wetting Characteristics of Compound Modified Bituminous Coal

Three-Dimensional Evaluation of Internal Structure of Coke Made by Blending Non-coking Coal Using X-ray Computed Tomography

CFD-DEM study on the synergistic effect of coke consumption and particle dynamics in the blast furnace raceway

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Study on Surface Activity of Inorganic Salts on [C₁₂MIm]Cl and Wetting Characteristics of Compound Modified Bituminous Coal

Study on Surface Activity of Inorganic Salts on [C₁₂MIm]Cl and Wetting Characteristics of Compound Modified Bituminous Coal