Effect of Carbon-Nanotube-Based Additives on Rheological Properties of Liquid Boiler Fuel

Zvereva, E. R.; Зуева, О. С.; Khabibullina, R. V.; Mingaleeva, G. R.; Akhmetvalieva, G. R.; Salikhzyanova, D. R.; Khatmullina, Z. F.

doi:10.1007/s10553-016-0734-x

Cited by 15 publications

(8 citation statements)

References 8 publications

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“…Moisture measurements of the initial mass showed the presence of 14.1 wt % water in the sample. When stirred and heated above 50 °C, the oil system became mobile, and their viscosity was very similar to fuel oil. − …”

Section: Methodsmentioning

confidence: 99%

Influence of High-Molecular n-Alkane Associates on Rheological Behavior of the Crude Oil Residue

et al. 2022

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In this paper, we present the results of chemical and physical investigations of the crude oil residue of low-sulfur but high-paraffin-base crude oil produced from the Mangyshlak (Kazakhstan) reservoir. The object contains 14.6 wt % of resins and significant amounts of high-molecular alkanes. A non-Newtonian behavior of the system is preserved even at 70–90 °C. 1H NMR data revealed divergence in temperature-dependent ratios corresponding to the low-viscous liquid petroleum products. The experimental results indicate the existence of associations of n-alkanes among themselves, as well as with resins and asphaltenes in the composition of the crude oil residue sample. In paraffin-base crude oil, the size of such associates (coacervates) is in the range of 100–300 nm. The associative behavior of medium- and long-chain n-alkanes is explained by their existence in transitional plastic (rotator) phases. As building blocks, associates of n-alkanes can be combined into worm-like structures due to adsorption of resins and asphaltenes on their surface and adhesion, thereby determining the non-Newtonian behavior and thixotropy of the system. Worm-like structures may be partially destructed under shear thinning (torn into shorter pieces) but can regenerate their structure over time. The optical and electron microscopy results justify the asphaltene aggregation model proposed by Balestrin and Loh. The formation of coacervates from asphaltene and concomitant molecules, which are surrounded by solvation shells of high-molecular alkanes, is evidenced. It is proposed that high-molecular n-alkane associates, as well as coacervates containing asphaltene and concomitant molecules, are compositional parts of many oil dispersed systems.

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Section: Methodsmentioning

confidence: 99%

Influence of High-Molecular n-Alkane Associates on Rheological Behavior of the Crude Oil Residue

et al. 2022

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“…This is due to the fact that there are only two main factors for the existence of additional structure formation: the very fact of introducing nanoparticles with excess surface energy into the dispersed system and the possibility of moving and associating molecules around them due to the liquid aggregate state of the system. The effect of adding small amounts of nanoparticles (including together with other additives that have already proved their effectiveness) can be used to improve the rheological properties of various types of hydrocarbon fuels, contributing to a decrease in energy intensity and production costs in technological processes [15][16][17]. However, the practical use of this effect requires solving two questions.…”

Section: The Methods In Generalmentioning

confidence: 99%

Methods and Materials of Nanotechnologies for Improving the Boiler Fuel Properties

Zvereva

Makarova

Зуева

2018

SSP

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It was shown that nanotechnology methods and materials can be used to create a composite fuel with improved performance characteristics. To reduce the viscosity of various types of hydrocarbon fuel, small amounts of nanoparticles can be added, leading to an additional structure formation, which may result in a change in the rheological properties due to the transition to layerwise shear flow. The possibilities of using carbon nanotubes and dehydrated carbonate sludge of water treatment were analyzed. The presence of a synergistic effect in the joint application of carbon nanotubes with carbonate sludge has been established. It has been shown that the choice of corresponding nanoparticles and their dispersion medium for a particular type of hydrocarbon fuel can significantly improve its performance characteristics.

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“…It turned out that the addition of small amounts of functional nanoscale structures to the fuel such as engineered nanoparticles of metals, oxides, carbides, nitrides [3][4][5][6][7][8][9][10], as well as carbon nanotubes [9][10][11][12][13][14][15][16][17], changes the properties of the fuel and can lead to an improvement in its operational and environmental characteristics. In our works [18][19][20], it was shown that the use of functional nanoscale structures can also be useful for improving the properties of heavy boiler fuel (fuel oil). Such additives alter the performance of the fuel and can lead to a decrease in the amount of harmful emissions into the atmosphere during the combustion of fuel oil [21].…”

Section: Introductionmentioning

confidence: 97%

Carbonate sludge as a nanostructured material for environmental engineering

et al. 2020

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The behaviour features of carbonate sludge which are a waste of water treatment process were studied in aqueous and oil environment. Based on the analysis of images of carbonate sludge particles in liquid media made by laser scanning confocal microscopes, the existence of nanostructures of various chemical compositions having several hundred nanometers in size, both single and forming porous conglomerate structures with a developed surface was revealed. The existence of such fragmentation of fine carbonate sludge powder particles in liquid media suggests that the mechanism of action of sludge additives is similar to that of nanoparticles. It was shown that the waste of the water treatment can be used as a cheap and environmentally friendly nanostructured material for industrial and environmental engineering, in particular, to improve the properties of hydrocarbon fuels. If necessary, the effect of carbonate sludge can be enhanced by changing its composition at the coagulation stage or by adding other nanoparticles. The data on the composition and texture characteristics of used sludge were given.

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Effect of Carbon-Nanotube-Based Additives on Rheological Properties of Liquid Boiler Fuel

Cited by 15 publications

References 8 publications

Influence of High-Molecular n-Alkane Associates on Rheological Behavior of the Crude Oil Residue

Influence of High-Molecular n-Alkane Associates on Rheological Behavior of the Crude Oil Residue

Methods and Materials of Nanotechnologies for Improving the Boiler Fuel Properties

Carbonate sludge as a nanostructured material for environmental engineering

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