Influence of antioxidants on spontaneous combustion and coal properties

Onifade, Moshood; Genc, Bekir; Gbadamosi, Abisola Risiwat; Morgan, Andrew M.; Ngoepe, Thapelo

doi:10.1016/j.psep.2021.02.017

Cited by 63 publications

(15 citation statements)

References 34 publications

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“…The presence of high minerals in a fuel act as a heat sink and blocks the pores and active sites of a fuel . A coal sample with high ash content was reported to have low SPONCOM liability . It is therefore expected for biomass to have high SPONCOM liability given that it has low ash content.…”

Section: Resultsmentioning

confidence: 99%

“…28 A coal sample with high ash content was reported to have low SPONCOM liability. 9 It is therefore expected for biomass to have high SPONCOM liability given that it has low ash content. Manic et al 8 also reported the same trend when investigating the selfignition potential of different biomass feedstocks.…”

Section: Relationship Between the Physicochemical Properties Of Bioma...mentioning

confidence: 99%

“…Generally, the methods used to predict the SPONCOM liability are based on thermal analysis . In an investigation conducted by Avila, using thermogravimetric analysis (TGA), the SPONCOM characteristics of biomass, biomass-coal blends, among other fuels were tested.…”

Section: Introductionmentioning

confidence: 99%

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Inhibition of Spontaneous Combustion Characteristic of Biomass Treated with Imidazolium-Based Ionic Liquids Using Thermogravimetric Analysis

Matsobane,

Bada,

Genc

et al. 2023

ACS Omega

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Emim HSO 4 , and [Bmim + OAc − ] on the SPONCOM liability of Sersia lancea biomass sample harvested from the Vaal River Mine, South Africa. The results of the derivative thermogravimetric (DTG) analysis of this indigenous biomass showed that it is highly liable to SPONCOM prior to treatment with ILs. Following treatment with all three ILs, the DTG results showed that ILs can potentially inhibit the SPONCOM liability of biomass, with [Bmim + OAc − ] showing the best inhibitory effects. With [Bmim + OAc − ] (IL-C), the TGspc index of S. lancea biomass was reduced to 0.0207 from 0.1457%/°C min −1 , and the sample was classified as low reactive after treatment. This indicates that less oxygen was consumed by the treated samples with [Bmim + OAc − ] than by the untreated ones. From the textural properties of the IL-treated biomass, the mechanism responsible for the lower liability of the treated biomass was determined. This study establishes that biomass is very reactive, and it is important to understand its liability to SPONCOM, before being shipped as a fired or co-fired fuel across the Atlantic.

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Section: Resultsmentioning

confidence: 99%

Section: Relationship Between the Physicochemical Properties Of Bioma...mentioning

confidence: 99%

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Inhibition of Spontaneous Combustion Characteristic of Biomass Treated with Imidazolium-Based Ionic Liquids Using Thermogravimetric Analysis

Matsobane,

Bada,

Genc

et al. 2023

ACS Omega

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“…Considering factors such as accuracy, feasibility, and efficiency, we often use O 2 concentration as a monitoring indicator in practice. We usually divide SCTZ in the mined-out area into heat dissipation, oxidation and suffocation zones according to air leakage, O 2 concentration, and temperature [ 2 ]( Table 1 ). This paper has taken the higher slice working face on the seventh mining and fifth face of Lingquan Mine as the object of study.…”

Section: Prefacementioning

confidence: 99%

Study on Spontaneous Combustion “Three Zones” of the Distribution Law and Integrated Fire Prevention Technology in Mined-Out Area of Lingquan Mine

Liu

Shen

Chen

et al. 2022

Computational Intelligence and Neuroscience

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To determine the risk range of remaining coal in the goaf of the higher slice on the seventh mining and fifth face of Lingquan Mine, the beam tube monitoring system was adopted to supervise the temperature and gas content changes in the goaf during the normal mining period of the working face. As per the principle of dividing spontaneous combustion “three zones” (SCTZ), numerical simulation of the distribution of SCTZ in the goaf of the work face was performed. The O2 content and index gas in the goaf were measured and analyzed, and combined with the in-situ measurement outcomes, the distribution of SCTZ in the goaf was determined through the FLUENT numerical modeling program. The outcomes show that the distribution pattern of SCTZ in the goaf of fully mechanized mining face is: the heat dissipation zone is 0–41 m, the oxidation zone is 41–97 m, the suffocation zone is more than 97 m away from the work face, and the increment of temperature is 0.7/°C. Based on the judgement result of SCTZ, the minimum recovery rate of work face is above 3.7 m/d. The use of new polymer materials validly solves the problem of excessive CO in the return air corner of the goaf and prevents self-ignition accidents in the goaf.

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“…The fire accident caused by coal spontaneous combustion (CSC) is one of the most serious coal mine accidents. [3][4][5] The occurrence of CSC is a complex physical and chemical reaction process, [6][7][8][9] resulting from multiple factors, among which the properties of coal (including coalification degree, water content, particle size, and porosity) [10][11][12] are key influencing factors. At present, as coal mining gradually develops toward the deep, the properties of coal undergo greater variations, [13][14][15] and thermal damage is one of the most important variations.…”

Section: Introductionmentioning

confidence: 99%

Effect of thermal damage on pore development and oxidation reaction of coal

Shao

Yang

2022

Asia-Pacific J Chem Eng

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With the coal entering deep mining, the thermal damage to the destruction of the coal body structure, causing the phenomenon of coal spontaneous combustion is more and more common. To better understand the effect of thermal damage on coal spontaneous combustion, the law of thermal damage on pore structure and free radical of coal was studied by automatic specific surface area analyzer and electron spin resonance spectrometer. It was concluded that 225 C was a key point of thermal damage on coal spontaneous combustion.

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Influence of antioxidants on spontaneous combustion and coal properties

Cited by 63 publications

References 34 publications

Inhibition of Spontaneous Combustion Characteristic of Biomass Treated with Imidazolium-Based Ionic Liquids Using Thermogravimetric Analysis

Inhibition of Spontaneous Combustion Characteristic of Biomass Treated with Imidazolium-Based Ionic Liquids Using Thermogravimetric Analysis

Study on Spontaneous Combustion “Three Zones” of the Distribution Law and Integrated Fire Prevention Technology in Mined-Out Area of Lingquan Mine

Effect of thermal damage on pore development and oxidation reaction of coal

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