Type of the study: Original research article relationship between temperature rise characteristics and the emission of carbon oxides during the spontaneous combustion latency of coal

Liu, Hao; Li, Zenghua; Yang, Yongliang; Miao, Guodong

doi:10.1016/j.jclepro.2023.138380

Cited by 13 publications

(2 citation statements)

References 41 publications

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“…This propensity primarily depends on factors such as the degree of coal metamorphism, brittleness, porosity, moisture content, composition of coal rock, and other internal factors. According to relevant national standards, 41 the classification index for assessing spontaneous combustion propensity should be based on the oxygen absorption per gram of dry coal at room temperature (30 °C) and atmospheric pressure (1.013 × 105 Pa). The temperature acquisition system is utilized for real-time monitoring of both coal and furnace temperatures.…”

Section: Determination Of Spontaneous Combustion Tendencymentioning

confidence: 99%

A Novel Microbial Compound Inhibitor and Its Efficacy in Preventing and Controlling Mine Fire Risks: A Case Study on Low-Rank Coal Spontaneous Combustion

Wang,

Liu,

et al. 2024

ACS Omega

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To guarantee the safety and sustainability of coal mining by effectively mitigating the substantial risk associated with coal spontaneous combustion, this study proposes a multifaceted prevention strategy aligned with green environmental principles. A compound flame retardant with a physicochemical control mechanism was prepared using indigenous microorganisms to mineralize residual coal after mining, utilizing Bacillus pasteurelli as a substitute material for inorganic salts. Under laboratory conditions simulating coal self-combustion, biobased flame retardants were employed to investigate the physical and chemical transformations of heat and mass evolution from ambient temperature to combustion in two representative low-rank coals. By quantitatively comparing alterations in microbiome-based groups among raw lignite, bioretarded lignite, and two control samples, the inhibitory mechanism of biobased materials on the oxygen reaction pathway was elucidated. The findings substantiated that biobased modification can consolidate the methyl and methylene groups present in aliphatic hydrocarbon side chains, which are prone to instigating low-temperature oxidation reactions. Additionally, the preventive performance of biobased flame retardants was assessed through temperature-programmed experiments, which involved estimating the critical self-heating temperature, oxygen consumption, and gas production rates of compared coal samples. The results demonstrated significant enhancements in the resistance to spontaneous combustion following bioretarded modification. Notably, the identification grade of long flame coal shifted from easy to moderate susceptibility to spontaneous combustion. Furthermore, biobased flame retardants exhibited remarkable flame retardancy rates of approximately 80% for lignite, thereby validating their efficacy as more environmentally friendly and technologically advanced substitute materials for inhibiting spontaneous combustion in low-rank coals.

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Section: Determination Of Spontaneous Combustion Tendencymentioning

confidence: 99%

A Novel Microbial Compound Inhibitor and Its Efficacy in Preventing and Controlling Mine Fire Risks: A Case Study on Low-Rank Coal Spontaneous Combustion

Wang,

Liu,

et al. 2024

ACS Omega

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“…[16][17][18][19][20] The researches reveal the change law of oxygen-containing groups during the low-temperature oxidation of coal, such as hydroxyl (-OH), ether bonds (C-O-C), carbonyl (-C=O), and carboxyl (-COOH). 21,22 However, it is the peroxide that is the first product of the reaction between coal and oxygen. 23 The free radicals produced by its decomposition are gradually transformed into oxygen-containing groups such as carbonyl and carboxyl groups.…”

mentioning

confidence: 99%

Characterization of peroxide on coal surface: A combined △SCF and XPS study

Liu,

2024

Surface & Interface Analysis

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X‐ray photoelectron spectroscopy (XPS) is widely used to determine the composition of elements and oxygen‐containing functional groups. Accurate determination of core‐electron binding energies (CEBEs) is essential for identifying the types and contents of oxygen‐functional groups present on the surface of coal. The △SCF method has been carried out on CEBEs for an extensive series of oxygen‐containing organic systems encompassing the most common functionalities. The polymers for which experimental values are available for comparison demonstrate the adequacy of the treatment for describing CEBEs for the O1s core level. Therefore, a sound basis is provided for the discussion of CEBEs (O1s) for functionalities for which experimental values are not accurate or available, such as carbonyl, carboxyl, and peroxide. The results are applied to the XPS study of oxidized coal. The change law of peroxide and oxygen‐containing functional groups was discussed. The calculation method and results in this paper can provide a guide for readers to use XPS to study the oxidation of coal surfaces.

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Structures and contributions of active substances in the latent oxidation of coal based on the oxygen isotope tracer method

Zhao,

Dai,

Qin

et al. 2024

Energy

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Type of the study: Original research article relationship between temperature rise characteristics and the emission of carbon oxides during the spontaneous combustion latency of coal

Cited by 13 publications

References 41 publications

A Novel Microbial Compound Inhibitor and Its Efficacy in Preventing and Controlling Mine Fire Risks: A Case Study on Low-Rank Coal Spontaneous Combustion

A Novel Microbial Compound Inhibitor and Its Efficacy in Preventing and Controlling Mine Fire Risks: A Case Study on Low-Rank Coal Spontaneous Combustion

Characterization of peroxide on coal surface: A combined △SCF and XPS study

Structures and contributions of active substances in the latent oxidation of coal based on the oxygen isotope tracer method

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