An experimental study of the effect of water content on combustion of coal tar/water emulsion droplets

Deng, Shaozhi; Zhou, Jiemin

doi:10.1016/j.energy.2011.07.052

Cited by 16 publications

(6 citation statements)

References 23 publications

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“…Deng and Zhou [9] experimentally investigated the droplets of coal tar/water emulsion for the unsteady behaviour of the burning droplets. They analysed coke residues by the scanning electron microscope (SEM).…”

Section: Coal Based Slurriesmentioning

confidence: 99%

Review on production, characterisation and utilisation of solid fuels in diesel engines

Wamankar

Murugan

2015

Renewable and Sustainable Energy Reviews

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Section: Coal Based Slurriesmentioning

confidence: 99%

Review on production, characterisation and utilisation of solid fuels in diesel engines

Wamankar

Murugan

2015

Renewable and Sustainable Energy Reviews

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“…23,24 Sulfur exists in coal in the form of pyrite, sulfate, and organic sulfur, among which pyrite has the greatest impact on coal spontaneous combustion. 25 Deng et al 26 found that under the separate action of different microstructure contents and pyrite, low-temperature oxidation can enhance the apparent activation energy of coal. Meanwhile, Zhang et al 27 and carbon and enhances the rate of gasification reactivity by inhibiting the growth of heavy aromatic structures, catalyzing the graphitization process, and enhancing the surface chemical properties.…”

Section: Introductionmentioning

confidence: 99%

“…Sulfur exists in coal in the form of pyrite, sulfate, and organic sulfur, among which pyrite has the greatest impact on coal spontaneous combustion . Deng et al found that under the separate action of different microstructure contents and pyrite, low-temperature oxidation can enhance the apparent activation energy of coal. Meanwhile, Zhang et al .…”

Section: Introductionmentioning

confidence: 99%

Effects of Moisture and Associated Pyrite on the Microstructure of Anthracite Coal for Spontaneous Combustion

et al. 2020

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To explore the micromechanism of the structural changes of anthracite due to heat accumulation by water and pyrite, during oxidation, anthracite with coal samples was selected in this work from Baijiao Coalmine, Sichuan, China. The samples were added with water of 1, 5, 10, 15, and 20 mass % and pyrite of 1, 2, 4, and 6 mass % and were conducted to experimented torts. As compared with the raw coal sample, the effects of water and pyrite on the microstructure of anthracite were studied. The results indicate that the oxygen-containing functional group of coal increases with the addition of water. The content of the aromatic structure in coal was thought to be due to water and pyrite synergistic effects. The synergistic effect of water and pyrite accelerates the oxidation process of seven types of active groups in coal samples. The water content was 10–15 mass %, and the associated pyrite content was 2–4 mass %; the contribution to the oxidation activity of the main active groups of coal was the largest under oxidizing conditions.

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“…17−23 For example, the use of an emulsifying crude coal tar with water to form water-in-oil emulsions is a good way to improve the combustion of coal tar and reduce environmental problems. 24 At certain conditions, the combustion of emulsion drops is accompanied by a phenomenon of microexplosion. Microexplosion represents rapid disintegration of an emulsion droplet caused by explosive boiling of embedded liquid subdroplets with a lower boiling point.…”

Section: Introductionmentioning

confidence: 99%

“…Nowadays there is an increase in the research interest of the issues related to an opportunity to use the emulsive combustible systems of oil-in-water and water-in-oil emulsions as fuels. − This is due to a number of reasons associated first of all with the issues of a decrease in the emission of NO x and soot, as well as with changes in the rheological properties of hydrocarbon fuels for increasing the spray combustion efficiency. − For example, the use of an emulsifying crude coal tar with water to form water-in-oil emulsions is a good way to improve the combustion of coal tar and reduce environmental problems …”

Section: Introductionmentioning

confidence: 99%

Combustion of Foamed Emulsions in the Quenching/Reignition Regime

et al. 2017

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In this paper, we consider the problems of combustion of a foamed emulsion consisting of oxygen bubbles dispersed in the emulsion, which represents a water solution of surfactant with oil drops distributed in it. The interest to study such problems is caused by the perspective of obtaining a new type of fuel based on a water–oil blend as well as by the need to solve ecological issues related to oil spilled on the water surface. At a significant content of water in the combustible foam, an irregular regime of flame propagation can be established that is related to sequential quenching and reignition of the foam. On the basis of experimental research, we study the influence of the magnesium oxide particle fraction, fuel concentration, and tube diameter on the speed of flame propagation in the foamed emulsion in the quenching/reignition regime. It is found that the presence of magnesium oxide particles in the foam leads to an increase in the total burning rate of the foam. A reduction in the tube diameter and the use of a leaner foam favor the onset of the quenching/reignition regime.

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An experimental study of the effect of water content on combustion of coal tar/water emulsion droplets

Cited by 16 publications

References 23 publications

Review on production, characterisation and utilisation of solid fuels in diesel engines

Review on production, characterisation and utilisation of solid fuels in diesel engines

Effects of Moisture and Associated Pyrite on the Microstructure of Anthracite Coal for Spontaneous Combustion

Combustion of Foamed Emulsions in the Quenching/Reignition Regime

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