Ignition of the Coal–Water Slurry Containing Petrochemicals and Charcoal

Кузнецов, Г. В.; Lyrschikov, Sergey Yu.; Стрижак, П. А.

doi:10.1021/acs.energyfuels.6b02245

Cited by 9 publications

(3 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure shows the ignition and combustion device of nanofluid fuels, which is similar to the device used in previous studies. − The device consists of a sample transfer system, a reaction system, a temperature measurement system, and a data acquisition system. There are two thermocouples.…”

Section: Methodsmentioning

confidence: 99%

Ignition and Combustion Characteristics of Heptane-Based Nanofluid Fuel Droplets

et al. 2019

View full text Add to dashboard Cite

Nanofluid fuels are promising fuels in the fields of spaceflight and aviation. Their stability is a critical constraint for potential applications. Oleic acid can enhance the stability of nanofluid fuels, but it influences the ignition and combustion performance of nanofluid fuels. In this study, the effects of various concentrations of oleic acid and nanoparticles (NPs) on the ignition and combustion performance of the heptane-based nanofluid droplets were studied using a high-temperature tubular resistance furnace system at 600–700 °C. The ignition delay times, ignition temperatures, and combustion processes of all samples were measured. The results show that with the increase of temperature, the ignition delay times and ignition temperatures of the pure heptane, heptane with addition of oleic acid, and heptane-based nanofluid droplets decrease. The addition of oleic acid into the heptane, its ignition delay time and ignition temperature significantly increase with the increase in oleic acid concentration, which are greatly increased by 60 and 40%, respectively, for the heptane droplet with 2% oleic acid compared with the heptane droplet. Oleic acid makes the heptane droplet to undergo microexplosion, surfactant combustion, and secondary extinguishment. With the increase in temperature and concentration of oleic acid, the microexplosion and the number of generated bubbles are more obvious. Al NPs have little influence on the ignition delay time of the heptane droplet with oleic acid at 600 and 650 °C, while the enhancement of nanoparticles is significant at 700 °C. In addition, Al NPs can decrease the ignition temperature of heptane-based nanofluid droplets and the decreased percent reaches 17%, but the promoting effect is weaker than the inhibition effect of oleic acid. With the increase in concentration of Al NPs, microexplosion of the heptane-based nanofluid droplet will be enhanced.

show abstract

Section: Methodsmentioning

confidence: 99%

Ignition and Combustion Characteristics of Heptane-Based Nanofluid Fuel Droplets

et al. 2019

View full text Add to dashboard Cite

show abstract

“…For this aim, a variety of methods have been developed. A number of scientifi c papers focus on the research into CWF combustion with additives of miscellaneous waste in different amounts that are produced by petrochemical, coke chemical, chemical, and wood processing industries (Chen et al, 2011;Glushkov et al, 2016;Iegorov et al, 2016;Jianzhong et al, 2014;Kuznetsov et al, 2016;Valiullin et al, 2017;Zhu et al, 2014).…”

Section: Problem Formulationmentioning

confidence: 99%

Experimental Investigation of the Influence of Temperature, Coal Metamorphic Stage, and of the Size of Coal–water Fuel Drop on the Fuel Drop Combustion Process

Pinchuk

Sharabura

Moumane

et al. 2019

Inter J Ener Clean Env

View full text Add to dashboard Cite

The experimental investigation carried out allowed one to determine the infl uence of the source coal grade, oven medium temperature, and of the CWF drop size on time and temperature correlations characterizing the process of individual fuel drop combustion in static air. It has been established that shortening of the total time of CWF drops combustion related to the oven medium temperature increase and the drop size decrease is governed by a power function. In identical conditions, the time of CWF drops combustion is shortened signifi cantly, when anthracite is replaced by the brown source coal. The research and processing of the obtained experimental data allowed establishing empirical dependences of the CWF drop combustion time on volatile content in the source coal, and on drops sizes, taking into account the oven medium temperature and the source coal grade. It was found that in the equation describing the dependence of the combustion time on the drops sizes the exponent of the size is equal to 1.6 and does not depend on the coal grade and oven medium temperature.

show abstract

“…and organic solid wastes (petrochemical and coal–chemical wastes, municipal solid waste, organic sludge, biomass-like solid waste, etc. ), which would bring serious threats to the ecological environment. − Accordingly, oil, organic solvents, and wastewater (industrial wastewater, petroleum and coal processing wastewater, sewage sludge wastewater, etc.) can be used as substitutes for the aqueous medium to efficiently recycle the heat value and deal with pollutants. − The inorganic matters in CWS can be deposited in slag and fly ash after combustion and gasification, and the organic substances can be converted chemically or burned directly to generate electricity.…”

Section: Introductionmentioning

confidence: 99%

Review and Perspectives of Anionic Dispersants for Coal–Water Slurry

Feng

et al. 2023

Energy Fuels

View full text Add to dashboard Cite

Dispersants are chemical moieties that modify interfacial characteristics by adsorption at the solid–liquid interface, and they have been widely used in modern industrial production. This review focuses on the research and perspectives of anionic dispersants for coal–water slurry (CWS). Various common anionic dispersants are briefly summarized, including natural and synthetic species. The interactions between coal particles in the CWS suspension, including van der Waals attraction and electrostatic repulsion, are described by the DLVO (Derjaguin–Landau–Verwey–Overbeek) theory. Due to the hydrophobic interaction and the steric effect resulting from the adsorption of polymer dispersants, the extended DLVO theory is introduced to elucidate the various interactions in the CWS system. Based on the interactions between the coal particles, the adsorption behaviors at the coal–water interface, and the interactions between coal and water, the dispersion and stabilization mechanisms are systematically and theoretically discussed. According to the variations of interaction energies between the coal particles, the use of anionic polymer dispersants can weaken the hydrophobic attraction and enhance the steric hindrance and electrostatic repulsion. Also, the rheological behaviors of CWSs are outlined, with emphasis on the pipeline transportation of CWS and the three-parameter Herschel–Bulkley model. Additionally, the properties of anionic dispersants for CWS can be improved by adjusting their chemical structures such as molecular weight, side chain length, rigidity and flexibility of the molecular chain, and variety, quantity, position, and proportion of hydrophobic and hydrophilic groups. In view of the relationships between the structure and property, a direction on the selection and preparation of dispersant for CWS is suggested. Finally, the current challenges and future perspectives of dispersants for CWS are put forward.

show abstract

Ignition of the Coal–Water Slurry Containing Petrochemicals and Charcoal

Cited by 9 publications

References 22 publications

Ignition and Combustion Characteristics of Heptane-Based Nanofluid Fuel Droplets

Ignition and Combustion Characteristics of Heptane-Based Nanofluid Fuel Droplets

Experimental Investigation of the Influence of Temperature, Coal Metamorphic Stage, and of the Size of Coal–water Fuel Drop on the Fuel Drop Combustion Process

Review and Perspectives of Anionic Dispersants for Coal–Water Slurry

Contact Info

Product

Resources

About