Wettability effect of ethoxylated nonyl phenol with different ethylene oxide chain length on Shendong long-flame coal surface

Li, Lin; He, Meng; Li, Zhihao; Ma, Chuandong; Yu, Hao; You, Xiaofang

doi:10.1016/j.mtcomm.2020.101697

Cited by 8 publications

(7 citation statements)

References 34 publications

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“…In addition, for the concentration of NPEO, an equilibrium concentration close to the critical micelle concentration (CMC) maximized the hydrophobicity of the low-rank coal surface. 60 The ester group has a stronger electron-absorbing ability. It can generate more stable hydrogen bonds, so the ester surfactant can adsorb more firmly on the low-rank/oxidized coal surface, bringing better hydrophobicity and flotation effect.…”

Section: Renewable Collector Replacing Conventionalmentioning

confidence: 99%

Advances and Perspectives of Green and Sustainable Flotation of Low-Rank/Oxidized Coal: A Review

Gao,

Li,

Lyu

et al. 2024

Energy Fuels

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Flotation is a mature technology for the commercial processing of fine coals. However, due to the difficult flotation characteristics of low-rank/oxidized coals, conventional flotation is often inefficient, resulting in massive low-rank/oxidized coal resources not being utilized efficiently and thus going to waste. In addition, the large quantities of conventional oil collectors used to meet satisfactory flotation objectives adversely affect the environment. Under the current huge energy demand and environmental pressures, the efficient, green, and sustainable upgrading of low-rank/oxidized coals is an urgent need for the coal industry. In recent years, a number of attractive techniques to improve separation accuracy have been proposed. However, few ideas have been reported about the application of different types of technologies throughout the flotation process which can improve the flotation process objectives and thus reduce the formation of contaminants. In order to explore an ideal flotation technology for low-rank/oxidized coals, this paper provides a systematic review of the research progress in low-rank/oxidized coal flotation, including the updates in three aspects: the development of pretreatment processes, selection and combination of flotation reagents, as well as optimization of flotation conditions. The synergy of multiple technologies, that maximize flotation objectives and thus reduce the dosage of non-renewable collectors, is the key to achieving green separation of low-rank/oxidized coals. According to the advantages of existing technologies, a green and sustainable flotation process for low-rank/oxidized coal combining pretreatment process, green flotation reagents, and flotation optimization process is proposed to obtain positive process objectives while maximizing economic savings and environmental friendliness.

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Section: Renewable Collector Replacing Conventionalmentioning

confidence: 99%

Advances and Perspectives of Green and Sustainable Flotation of Low-Rank/Oxidized Coal: A Review

Gao,

Li,

Lyu

et al. 2024

Energy Fuels

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“…e magnitude of the adsorption energy value can measure the adsorption strength. e more negative the adsorption energy, the more energy released, the higher the degree of aggregation, and the higher the adsorption strength [37,85,86].…”

Section: Adsorption Energymentioning

confidence: 99%

“…Surfactants have been widely used in the coal industry, such as in the fields of coal flotation and coal dust suppression [34][35][36][37][38][39][40][41]. e research on the interface characteristics of coal relies on the basic theory of coal wettability [42][43][44].…”

Section: Introductionmentioning

confidence: 99%

Computational Study on the Microscopic Adsorption Characteristics of Linear Alkylbenzene Sulfonates with Different Chain Lengths on Anthracite Surface

Chen

Yan

et al. 2022

Journal of Chemistry

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In order to explore the influence of different lengths of hydrophobic carbon chains on the diffusion characteristics of surfactants on the surface of anthracite, six linear alkyl benzene sulfonates with different hydrophobic carbon chain lengths were selected (mC, m = 8, 10, 12, 14, 16, 18; m represents the numbers of carbon atoms in the hydrophobic carbon chain), and molecular dynamics (MD) simulations were adopted. Models of surfactant-anthracite, surfactant-graphite layer, and water-surfactant-anthracite were constructed. After analyzing a series of properties such as adsorption energy, diffusion coefficient, radial distribution function (RDF), and hydrophobic tail order parameters, it was found that 12C had the highest adsorption strength on the surface of anthracite; the reason was that 12C had the highest degree of aggregation near the oxygen-containing functional groups on the surface of anthracite. Further studies had found that the hydrophobic tail chain of 12C had the strongest isotropy. The study fills the gap in the systematic study of the diffusion characteristics of linear alkylbenzene sulfonates (LAS) with different chain lengths on the surface of anthracite, enriches and develops the basic theory of coal wettability, and also provides technical ideas for the design of new surfactants and new dust suppression agents.

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“…In the coal industry, surfactants have been widely used in coal flotation and coal dust suppression [16][17][18][19][20]. Research on coal flotation and coal dust suppression relies on the basic theory of coal wettability [16,[21][22][23].…”

Section: Introductionmentioning

confidence: 99%

“…Existing experimental research has proved that diffusion characteristics of surfactants on a coal surface are an important factor affecting the wettability of coal [23][24][25][26][27][28]. However, the experimental method cannot explain the structure, dynamics, and energy characteristics of the molecular adsorption In the coal industry, surfactants have been widely used in co suppression [16][17][18][19][20]. Research on coal flotation and coal dust s basic theory of coal wettability [16,[21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Microscopic Diffusion Characteristics of Linear Alkylbenzene Sulfonates on the Surface of Anthracite: The Influence of Different Attachment Sites of Benzene Ring in the Backbone

et al. 2021

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In order to explore the effect of the attachment site of the benzene ring in the backbone of the surfactant on its diffusion characteristics on the surface of anthracite, the molecular dynamics simulation method was used, and the four isomers (m-C16, m = 2,4,6,8; m represents the attachment site of the benzene ring in the backbone) of sodium hexadecyl benzene sulfonate (SHS) were selected. Binary models of surfactant/anthracite, surfactant/graphene modified by oxygen-containing functional groups, and a ternary model of water/surfactant/anthracite were constructed. By analyzing a series of properties such as interaction energy, contact surface area, relative concentration distribution, radial distribution function, hydrophobic tail chain order parameter, etc., it is concluded that the adsorption strength of 4-C16 on the surface of anthracite is the highest; the reason is that 4-C16 has the highest degree of aggregation near the oxygen-containing functional groups on the surface of anthracite. Further investigations find that 4-C16 can be densely covered on the ketone group, and the longer branch chain of 4-C16 has the highest degree of order in the Z-axis direction.

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Wettability effect of ethoxylated nonyl phenol with different ethylene oxide chain length on Shendong long-flame coal surface

Cited by 8 publications

References 34 publications

Advances and Perspectives of Green and Sustainable Flotation of Low-Rank/Oxidized Coal: A Review

Advances and Perspectives of Green and Sustainable Flotation of Low-Rank/Oxidized Coal: A Review

Computational Study on the Microscopic Adsorption Characteristics of Linear Alkylbenzene Sulfonates with Different Chain Lengths on Anthracite Surface

Microscopic Diffusion Characteristics of Linear Alkylbenzene Sulfonates on the Surface of Anthracite: The Influence of Different Attachment Sites of Benzene Ring in the Backbone

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