Experimental study and molecular simulation of spontaneous combustion of coal gangue by oxidation under different water contents

Wang, Wencai; Wang, Peng; Cao, Zhao; Cao, Yongdan; Ma, Yingge

doi:10.1080/19392699.2022.2151588

Cited by 6 publications

(6 citation statements)

References 33 publications

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“…Verifying the image features of the spliced microscopic hyperspectral images by calculating them is the way to assess the stitching effect of two microscopic hyperspectral image MATLAB software was employed to differentiate and con-trast the shape [8], grayscale [9], and texture [10] features of the upper and lower sides of the images prior to stitching. The stitching precision is demonstrated in Table 1 for the image features.…”

Section: 2results Analysismentioning

confidence: 99%

A method for microscopic hyperspectral image mosaic based on RGB image layer feature localization and mosaicing

Liu,

Long,

Chen

2024

International Conference on Computer Graphics, Artificial Intelligence, and Data Processing (ICCAID 2023)

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Research into early data collection is often neglected, despite the growing focus on micro hyperspectral imaging technology in the medical field. Unfortunately, the data obtained from a single micro hyperspectral image is often limited in scope, making it hard to extract features and analyze spectral data of healthy cells. To address the above issues, a micro hyperspectral image stitching method based on RGB image layer feature localization and stitching is proposed, Extract the collected data into three RGB bands, perform feature extraction on them, calculate the horizontal offset, and complete the matching and stitching of microscopic hyperspectral images based on the coordinate position relationship.By employing the mean filtering technique, data fusion can be accomplished, thus allowing for the stitching of hyperspectral images on the micro dimension for spectral information.

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Section: 2results Analysismentioning

confidence: 99%

A method for microscopic hyperspectral image mosaic based on RGB image layer feature localization and mosaicing

Liu,

Long,

Chen

2024

International Conference on Computer Graphics, Artificial Intelligence, and Data Processing (ICCAID 2023)

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“…However, the gas adsorption capacity of kaolinite may affect the spontaneous combustion of gangues. 13,37 It can be seen that the amount of CO produced by the spontaneous combustion of gangues is large, and the characteristics are obvious in the oxygen-poor state inside the gangue hill. As an indicator gas for monitoring spontaneous combustion, further studies of its adsorption and diffusion are of strong practical interest.…”

Section: Mechanism Analysis Of Co Productionmentioning

confidence: 99%

“…Through molecular simulation, Wang 11 found that the adsorption amount of H 2 is positively correlated with the coal rank and affected by the chemical properties and pores of the coal surface. Wang 12,13 used a double-layer kaolinite model instead of a coal gangue to study the adsorption behavior of the gangue. They also found that a gangue with a high moisture content has a good effect on oxygen adsorption, while a gangue with a pressure below 10 MPa has a significant change in the system energy for oxygen adsorption through gangue slits, and based on this, the process of oxygen adsorption and seepage in the gangue is divided into four stages, which shows that the spontaneous combustion of the coal gangue can be controlled by controlling the pressure.…”

Section: Introductionmentioning

confidence: 99%

Molecular simulation of CO production and adsorption in a coal–kaolinite composite gangue slit model

Zhang,

Li,

et al. 2024

RSC Adv.

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“…CG is a complex mixture, which has the characteristics of low carbon and high ash content, low calorific value, and difficult combustion, which is different from coal’s oxidation pyrolysis and combustion characteristics. − Recently, many scholars have studied the oxidation pyrolysis process and thermodynamics of CG spontaneous combustion and achieved fruitful results. , For example, Ran et al used thermal analysis technology to study CG from four different production areas and obtained the characteristic parameters of the pyrolysis reaction process of CG, such as activation energy, mechanism function, etc. The experimental results showed that reaction temperature, CG particle size, CG production area, and heating rate all had an influence on the pyrolysis reaction process of CG.…”

Section: Introductionmentioning

confidence: 99%

Study on Pyrolysis and Oxidation Characteristics of Coal Gangue Based on TGA-DSC

Jin,

Li,

Liu

et al. 2024

ACS Omega

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Coal gangue spontaneous combustion has caused serious environmental and ecological problems. To investigate the reaction kinetic parameters of the gangue and the exothermic characteristics of the spontaneous combustion of the influence of the law, this study employs the thermogravimetric method to explore the characteristic parameters of the pyrolysis and oxidative combustion process of the gangue from the perspective of thermodynamics, and, at the same time, using the differential scanning calorimetry (DSC) on the exothermic effect of the gangue to explore the gangue to obtain the gangue and the original coal TG/DTG/DSC curves to be compared and from the perspective of thermodynamics. The change rule and potential parameters in the pyrolysis and oxidative combustion process of coal gangue (CG) were analyzed, the oxidation kinetic properties of CG were studied, and the reaction mechanism of oxidative spontaneous combustion of CG was further explained. The results show that the TG/DTG/DSC curves of CG in different gas atmospheres will have significant differences in all stages, and in the process of pyrolysis and oxidative combustion, the thermogravimetric curves of CG and those of the original coal show a consistent trend, except for the large difference in peak amplitude in different stages; in different gas atmospheres, as the rate of warming increases, the TG/DTG/DSC curves of the gangue are tilted toward the hightemperature region, they are inclined to the high-temperature region with the increase of the heating rate, and the phenomenon of "hysteresis" of characteristic temperature occurs. The research results provide a theoretical basis for the construction of a spontaneous combustion early warning system based on the fine division of gangue pyrolysis and oxidation combustion stages.

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Experimental study and molecular simulation of spontaneous combustion of coal gangue by oxidation under different water contents

Cited by 6 publications

References 33 publications

A method for microscopic hyperspectral image mosaic based on RGB image layer feature localization and mosaicing

A method for microscopic hyperspectral image mosaic based on RGB image layer feature localization and mosaicing

Molecular simulation of CO production and adsorption in a coal–kaolinite composite gangue slit model

Study on Pyrolysis and Oxidation Characteristics of Coal Gangue Based on TGA-DSC

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