Thermogravimetric Analysis of Target Inhibitors for the Spontaneous Self-Heating of Coal

Raymond, Christopher J.; Farmer, Justin; Dockery, Christopher R.

doi:10.1080/00102202.2016.1177034

Cited by 18 publications

(7 citation statements)

References 20 publications

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“…Char was produced by pyrolysis of anaerobically digested and thermally dried sewage sludge (SS) supplied by an urban wastewater treatment plant located in Madrid (Spain). Information about SS properties can be found elsewhere (Ruiz-G omez et al, 2017). The pyrolysis was performed in a fixed-bed reactor of 1 kg of capacity ( Abrego et al, 2018) in N 2 atmosphere (250 mL (STP) min À1 ).…”

Section: Methodsmentioning

confidence: 99%

“…This SS mineral matter is mainly composed of Al, Fe, Si, Ca and P (Ruiz-G omez et al, 2017). Some inorganic compounds, such as pyrite (Wang et al, 2003) and calcium carbonate (Sujant and Zhang, 2000) promote the oxidation process while others such as phosphates inhibit it (Raymond et al, 2016)). The presence of relatively high amounts of N and S is also a particularity of SS char.…”

Section: Introductionmentioning

confidence: 99%

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Functionalization of sewage sludge char by partial oxidation with molecular oxygen to enhance its adsorptive properties

Atienza-Martínez

Suraini

Ábrego

et al. 2021

Journal of Cleaner Production

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Functionalization of sewage sludge char by partial oxidation with molecular oxygen to enhance its adsorptive properties

Atienza-Martínez

Suraini

Ábrego

et al. 2021

Journal of Cleaner Production

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“…Wang et al 9 selected inorganic salt such as magnesium chloride and calcium chloride to combine with free radical scavengers N,Ndibenzylhydroxylamine and 2,6-di-tert-butyl-4-methylphenol to form a composite inhibitor. Christopher et al 10 studied the effect of inorganic phosphate Pi and sulfonate mixed with surfactants on coal spontaneous combustion and found that inorganic salts can destroy free radicals generated during coal oxidation and surfactants can prevent coal from contacting with oxygen. Dou et al 11 studied the inhibitory effect of catechin and poly(ethylene glycol) on coal and found that they could generate more stable ether bonds in coal.…”

Section: Introductionmentioning

confidence: 99%

Fire-Prevention Characteristics of an Active Colloid Prepared from Stimulated Fly Ash Component

Jie

Zhou

2022

ACS Omega

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In this paper, an active colloid (AC) with a three-dimensional network framework, prepared from stimulated fly ash (FA) component by an acid–base compound chemical method, was proposed for prevention of coal mine fire. During the stimulation process, the active substance in fly ash can be released and transformed into effective components for fire prevention. Research results show that Al3+, Fe3+, and Ti4+ from FA can serve as metal cross-linking agents to graft-copolymerize with sodium carboxymethyl cellulose. Mg2+ and Ca2+ can be formed into halogenated salts that are encapsulated by composite colloids and cooperate with them to participate in fire prevention. The remaining fly ash solid particles served as an inert component can be fixed in the framework to encapsulate more water, improving the colloid’s strength and water retention. The content of the active component was measured by inductively coupled plasma (ICP) emission spectroscopy to evaluate the stimulation effect of fly ash. The gel time, viscosity, water retention, and other performance parameters were determined for evaluation of physical characteristics. The fire-prevention performances of AC were also determined by the inhibition performance test, thermogravimetric analysis, and infrared spectroscopy. Moreover, the fire-prevention mechanism of AC was also explored. These results showed that the AC prepared from the stimulated fly ash component can greatly inhibit the spontaneous combustion of coal and can be chosen as a potential material for prevention of coal mine fire caused by spontaneous combustion of coal.

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“…Minerals have received extensive attention in the process of spontaneous combustion from scholars because of their high reactivity characteristics. In recent years, many studies have been done on the effects of coal minerals on spontaneous combustion [10–15] 1…”

Section: Introductionmentioning

confidence: 99%

Mechanistic Study on the Impact of the Occurrence of Various Basic Mineral Species on Spontaneous Combustion Propensity of Alkali‐Rich Low‐Rank Coal

Lü

Zhao

et al. 2022

ChemistrySelect

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Spontaneous combustion of low‐rank coal, especially alkali‐rich coal, is a key issue that determines the safety of storage and transportation. To understand the role of different forms of Alkali and alkaline earth metals (AAEMs) on coal spontaneous combustion, AAEMs in raw coal were sequentially eluted by water, ammonium acetate (NH4OAc) and hydrochloric acid (HCl) solution. The occurrence forms and mineralogical characteristics of AAEMs in raw coal and its derived coal samples were investigated. Further, the spontaneous combustion tendency of raw coal and derived coal samples was measured by programmed heating process and the chemical structure parameters were characterized by thermogravimetric analysis and differential scanning calorimetry (TGA‐DSC) and in situ infrared spectroscopy. The results show that demineralization mitigates the spontaneous combustion tendency by the increasing the ignition temperature, confirming the enhancement of inherent mineral on low‐temperature oxidation. In situ infrared spectroscopy results suggest that acid‐soluble and ion‐exchangeable AAEMs have greater catalytic impact on the oxidation reaction of coal than water‐soluble AAEMs. Specifically, the complete removal of AAEMs by acid‐washing treatment has the most obvious effect on the change of oxygen‐containing functional groups, which greatly reduces the generation rate of carboxylic acid, ester and anhydride groups during the low temperature oxidation. Moreover, calcium elements including ion‐exchangeable calcium and HCl‐soluble calcium can promote the oxidation capacity of coal at low‐temperature, which were verified by loaded coal samples.

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Thermogravimetric Analysis of Target Inhibitors for the Spontaneous Self-Heating of Coal

Cited by 18 publications

References 20 publications

Functionalization of sewage sludge char by partial oxidation with molecular oxygen to enhance its adsorptive properties

Functionalization of sewage sludge char by partial oxidation with molecular oxygen to enhance its adsorptive properties

Fire-Prevention Characteristics of an Active Colloid Prepared from Stimulated Fly Ash Component

Mechanistic Study on the Impact of the Occurrence of Various Basic Mineral Species on Spontaneous Combustion Propensity of Alkali‐Rich Low‐Rank Coal

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