Study on the effect of anionic/nonionic surfactants on gangue synergistic dust reduction: Molecular dynamics simulation and experimental validation

Construction and Building Materials, Journal Year: 2025, Volume and Issue: 460, P. 139871 - 139871

Published: Jan. 1, 2025

Language: Английский

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Study on a novel Hydraulic rotary wind-spray control combined dust reduction device for shearer

Process Safety and Environmental Protection, Journal Year: 2025, Volume and Issue: unknown, P. 106858 - 106858

Published: Feb. 1, 2025

Language: Английский

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Fractal Evolution Characteristics of Pore Structure in Coal-Acidified Stimulation

Fractal and Fractional, Journal Year: 2025, Volume and Issue: 9(2), P. 62 - 62

Published: Jan. 22, 2025

The pore structure and connectivity of coal are the primary factors influencing permeability reservoirs. However, clay carbonate minerals commonly found filling pores fractures within coal. To address impact these on fracturing effectiveness, acidic technology has been introduced. This technique proven to be an effective measure for enhancing extraction rate low-permeability seams with high mineral content. In this study, samples were treated a 3% HCl solution, changes in before after acidification analyzed through low-temperature nitrogen adsorption X-ray diffraction (XRD) testing. results as follows: After acidification, specific surface area, total volume, volume different stages, average size all significantly increased. Specifically, BET area grew by 4.8 times expanded 7.7 times, volumes ranges <10 nm 10–60 increasing 10.1 times. smoothness improved, indicated decreased fractal dimensions D1 (reflecting roughness) D2 (representing distribution uniformity). mechanism was mainly attributed dissolution coal, which led removal obstructive such ankerite calcite that had accumulated pores. resulted formation new micropores microfractures, achieving enhancement expansion.

Language: Английский

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Study on the effect of acidification reaction conditions on the pore structure of coal samples based on 2D NMR T1-T2

Advanced Powder Technology, Journal Year: 2025, Volume and Issue: 36(3), P. 104792 - 104792

Published: Jan. 28, 2025

Language: Английский

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Study on the effect of mixed acid treatment on the microstructure and gas desorption kinetics of lignite

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(4)

Published: April 1, 2025

Research on physical and chemical structure, pore morphology, desorption characteristics of coal before after acidification is crucial for advancing coalbed methane development. Changes in mineral composition, gas behavior were systematically analyzed using techniques such as scanning electron microscopy (SEM), low temperature liquid nitrogen adsorption (LTNA), x-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR). SEM images reveal that treatments substantially alter the surface morphology lignite. The combined application hydrofluoric acid, hydrochloric acetic acid effectively removes inorganic minerals from while enhancing connectivity pores. LTNA experiments indicated specific area, volume, maximum capacity lignite significantly increased following mixed treatment. XRD FTIR analyses demonstrated treatment altered properties enhanced reactivity Gas measured acidification. three acids improved performance, initial velocity release amount increased, showed more obvious advantages stage desorption. A comprehensive quantitative index (φ) was established to relate microscopic parameters with parameters, allowing evaluation impact performance. φ value three-acid group 3.83, exceeding 1, which highlights superior effect

Language: Английский

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Thermal hazard characteristics of lignite wetted with surfactant SDBS based on experimental and thermodynamic analysis

Journal of Molecular Liquids, Journal Year: 2024, Volume and Issue: 418, P. 126698 - 126698

Published: Dec. 9, 2024

Language: Английский

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