Coal flotation in a low-rank carbonaceous mineral using 3-phenyl-1-propanol as a collector reagent

Vilasó-Cadre, Javier E.; Ávila-Márquez, Delia M.; Reyes-Domínguez, I. A.; Blanco-Flores, Alien; Gutiérrez-Castañeda, E.

doi:10.1016/j.fuel.2021.121363

Cited by 19 publications

(9 citation statements)

References 26 publications

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“…Studies on the froth flotation process focused on developing new efficient flotation collectors. − As a result of the fact that traditional nonpolar hydrocarbon collectors (diesel, kerosene, etc.) are not effective, organics with oxygen functional group collectors (esters, phenols, organic acids, oxidized hydrocarbon, alcohol, and ethers) have been investigated and adopted in low-rank coal flotation. The reason is that oxygen-containing functional groups will react with the surface of coal and then improve the hydrophobic property.…”

Section: Introductionmentioning

confidence: 99%

Effect of Na⁺ and K⁺ on the Modification of Low-Rank Coal by an Ionic Surfactant and Its Adsorption Mechanism

Li,

Zhou,

Albijanic

et al. 2023

Energy Fuels

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This study is dedicated to investigating the impacts of the inorganic salt concentration on low-rank coal modified by ionic surfactants [dodecyltrimethylammonium chloride (DTAC) and sodium dodecyl sulfate (SDS)] and its adsorption mechanism using ζ potential determination, total organic carbon test, contact angle measurement, and Fourier transform infrared (FTIR) analysis, in addition to the interaction theory calculations and adsorption experiments. The results of interaction model calculation, adsorption capacity and contact angle showed that the salt solution (KCl and NaCl) could effectively increase the adsorption capacity of the surfactant on coal and improve the hydrophobicity of coal. Moreover, the relatively optimal salt concentrations for DTAC-and SDS-modified coal were different, which were 500 g/t coal of KCl and 5000 g/t coal of NaCl, respectively. The FTIR analysis results indicated that DTAC was adsorbed on the coal by strong electrostatic force and weak hydrogen bonding force, but the way of SDS molecule adsorption was mainly hydrogen bonds. The role of salt ions is to break the hydrogen bonds of coal−water and surfactant−water, in addition to enhance the electrostatic interaction, which makes the electrostatic adsorption of DTAC and hydrogen bond adsorption of SDS on the coal surface easier to occur.

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Section: Introductionmentioning

confidence: 99%

Effect of Na⁺ and K⁺ on the Modification of Low-Rank Coal by an Ionic Surfactant and Its Adsorption Mechanism

Li,

Zhou,

Albijanic

et al. 2023

Energy Fuels

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“…It is well recognized that unburned carbon is hydrophobic, and the adsorption process is commonly enhanced using solvents with hydrophobic and non-ionic hydrophilic groups. 16 Indeed, conventional oils such as kerosene, fuel oil, and waste oil 17 exhibit good adsorption performance in low-rank coal systems. However, the relatively low unburned carbon content in the suspension system leads to weak adsorption ability under the same conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, emphasis should be placed on selecting organic solvents that can effectively adsorb unburned carbon. It is well recognized that unburned carbon is hydrophobic, and the adsorption process is commonly enhanced using solvents with hydrophobic and non-ionic hydrophilic groups . Indeed, conventional oils such as kerosene, fuel oil, and waste oil exhibit good adsorption performance in low-rank coal systems.…”

Section: Introductionmentioning

confidence: 99%

Stepwise Separation for Calcium Recovery from an Ammonium Sulfate Leaching System

Gu²,

Yang

et al. 2023

Ind. Eng. Chem. Res.

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Calcium recovery from high calcium solid waste is driven by the latter's growing environmental impact, emphasizing the need to develop a high value-added utilization approach. Inspired by our previous study, we develop a stepwise separation strategy for calcium recovery from an ammonium sulfate leaching system to efficiently remove iron and unburned carbon residue. In this study, tributyl phosphate (TBP) used as the carbon residue adsorbent for calcium recovery exhibits high selectivity and good recycling stability. Adsorption measurements show that TBP yields a superior carbon residue adsorption ability with a maximum adsorption ratio greater than 95%. Moreover, the adsorption percentage is also kept more than 90% after 10 cycles, which substantiates the good potential of TBP for reuse. Besides, the low concentration (1 mol/L) of H 2 SO 4 provides an acidic environment, which makes TBP more feasible to be applied in carbon residue adsorption and effective iron(III) stripping. Furthermore, it is inferred from the Fourier transform infrared spectroscopy/X-ray photoelectron spectrometer and density functional theory analyses that the enhanced carbon separation performance may be ascribed to the carboxyl in carbon residue coordinated to the donor oxygen atom of TBP at the position of P− O. This work provides the foothold for further research on the recovery of calcium from industrial by-products.

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“…However, the above-mentioned two methods have some limitations in practical application due to the high cost of agents and cumbersome practical operation methods. 6 , 7 To solve the above-mentioned problems, the development of mixed collectors has been extensively studied. 8 , 9 On the one hand, the mixed collector is mostly a conventional collector, which has the advantage of sufficient supply and low price.…”

Section: Introductionmentioning

confidence: 99%

“…At present, the development of new collectors and emulsification of collectors have achieved satisfactory results. However, the above-mentioned two methods have some limitations in practical application due to the high cost of agents and cumbersome practical operation methods. , To solve the above-mentioned problems, the development of mixed collectors has been extensively studied. , On the one hand, the mixed collector is mostly a conventional collector, which has the advantage of sufficient supply and low price. On the other hand, the mixed collector does not need to change the existing process and equipment in practical production, which greatly improves the feasibility of practical application.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Flotation Separation of Low-Rank Coal with a Mixed Collector: Experimental and Molecular Dynamics Simulation Study

Kang

Zhang

2022

ACS Omega

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The efficient flotation separation of low-rank coal is still a difficult problem. The development of a collector is the key to solve the problem. In this study, a kind of mixed collector scheme with a practical value is proposed. The effects of the single collector dodecane (D) and methyl oleate (MO) and mixed collector D–didodecyl dimethyl ammonium bromide (DDAB) and MO–DDAB on flotation separation of low-rank coal were investigated. The flotation test results show that when the molar ratios of the mixed collector D–DDAB and MO–DDAB are 9:1 and the flotation time is 4 min, the cumulative combustible recovery of low-rank coal flotation is 71.49 and 76.73%, respectively, and the cleaned coal ash is 15.26 and 13.03%, respectively. The mixed collector significantly improves the flotation effect of low-rank coal compared with the single collector. According to the analysis results of the contact angle, wetting heat, Fourier-transform infrared spectroscopy, and X-ray photoelectron spectroscopy, the hydrophobicity of the low-rank coal surface is enhanced under the action of the mixed collector, and the adsorption between the mixed collector and coal surface is stronger. In addition, molecular dynamics (MD) simulation results show that compared with D or MO, DDAB tends to adsorb on the surface of low-rank coal, and the diffusion coefficients of water molecules on the surface of coal increase. The mixed collector first repels water molecules through its double hydrophobic carbon chain to weaken the binding of the coal surface to water molecules and then uses D or MO to further repel water molecules, thus effectively enhancing the surface hydrophobicity of low-rank coal.

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Coal flotation in a low-rank carbonaceous mineral using 3-phenyl-1-propanol as a collector reagent

Cited by 19 publications

References 26 publications

Effect of Na⁺ and K⁺ on the Modification of Low-Rank Coal by an Ionic Surfactant and Its Adsorption Mechanism

Effect of Na⁺ and K⁺ on the Modification of Low-Rank Coal by an Ionic Surfactant and Its Adsorption Mechanism

Stepwise Separation for Calcium Recovery from an Ammonium Sulfate Leaching System

Enhanced Flotation Separation of Low-Rank Coal with a Mixed Collector: Experimental and Molecular Dynamics Simulation Study

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Coal flotation in a low-rank carbonaceous mineral using 3-phenyl-1-propanol as a collector reagent

Cited by 19 publications

References 26 publications

Effect of Na+ and K+ on the Modification of Low-Rank Coal by an Ionic Surfactant and Its Adsorption Mechanism

Effect of Na+ and K+ on the Modification of Low-Rank Coal by an Ionic Surfactant and Its Adsorption Mechanism

Stepwise Separation for Calcium Recovery from an Ammonium Sulfate Leaching System

Enhanced Flotation Separation of Low-Rank Coal with a Mixed Collector: Experimental and Molecular Dynamics Simulation Study

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Product

Resources

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Effect of Na⁺ and K⁺ on the Modification of Low-Rank Coal by an Ionic Surfactant and Its Adsorption Mechanism

Effect of Na⁺ and K⁺ on the Modification of Low-Rank Coal by an Ionic Surfactant and Its Adsorption Mechanism