煤制油气化灰渣防灭火凝胶的制备及性能

doi:10.11896/cldb.22040127

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Abstract Aiming at the problems of environmental pollution and waste of solid waste resources caused by the accumulation of coal-based gasification ash residues, coal mine fire extinguishing material, gasification ash residue gel, was prepared using gasification residue as the base material and hydroxypropyl methylcellulose (HPMC) as the gelling agent. Coal mine fire-extinguishing materials were analyzed by scanning electron microscope and Fourier transform infrared spectrometer to analyze their microscopic morphology and surface functional group characteristics. Factors such as gelation time, thermal stability and water retention were investigated, and the optimal formulation of the gasification slag gel was determined to be the water-cement ratio of 1∶1.25 and the addition of HPMC of 1.5%. The reaction of functional groups, such as hydroxyl, methyl, methylene, substituted aromatic hydrocarbons and carbon-oxygen bonds, was inhibited during the spontaneous combustion of coal. At 80 ℃, the peak area of aromatic hydrocarbons decreased by 11.85%, and the peak area of aliphatic hydrocarbons decreased by 43.07%. The peak area of aromatic hydrocarbons decreased by 27.36% and the peak area of aliphatic hydrocarbons decreased by 44.23% at 120 ℃. During the oxidative heating process of the gel-treated coal samples, the CO concentration decreased by 65.07% at 100 ℃. The CO concentration decreased by 53.09% and the C₂H₄ concentration decreased by 23.68% at 200 ℃. The microscopic and macroscopic results showed that the spontaneous combustion process of coal was inhibited better by the gasification ash slag gel. Its chemical resistance was better than that of CaCl₂, which could effectively prevent coal spontaneous combustion disasters. This solves the problem of ash accumulation, and realizes the resource utilization of solid waste.

Key words： gasification ash coal spontaneous combustion fire prevention gel

Published: 10 February 2024 Online: 2024-02-19

CLC number:

X752

Fund:Shaanxi Province Technology Innovation Guidance Special Project(2021QFY04-05),Science and Technology Program of YuLin High Tech Industrial Development Zone (ZD-2020-15),Science and Technology Program of YuLin High Tech Industrial Development Zone (ZD-2021-05),Science and Technology Program of YuLin High Tech Industrial Development Zone (ZD-2021-13).

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	ZHANG Duo
	SUN Wei
	GUO Ximan
	CEN Xiaoxin
	DAI Aiping

Cite this article:

ZHANG Duo,SUN Wei,GUO Ximan, et al. Preparation and Properties of Coal-based Gasification Ash Fire-extinguishing Gel[J]. Materials Reports, 2024, 38(3): 22040127-7.

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http://www.mater-rep.com/EN/10.11896/cldb.22040127 OR http://www.mater-rep.com/EN/Y2024/V38/I3/22040127

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